Merge remote-tracking branch 'es/7.x' into enrich-7.x

.ci/bwcVersions

@@ -43,4 +43,5 @@ BWC_VERSION:
   - "7.3.0"
   - "7.3.1"
   - "7.3.2"
+  - "7.3.3"
   - "7.4.0"

.ci/init.gradle

@@ -86,6 +86,10 @@ if (buildCacheUrl) {
             .getData();
     gradle.settingsEvaluated { settings ->
         settings.buildCache {
+            local {
+                // Disable the local build cache in CI since we use ephemeral workers and it incurs an IO penalty
+                enabled = false
+            }
             remote(HttpBuildCache) {
                 url = buildCacheUrl
                 push = buildCachePush

buildSrc/build.gradle

@@ -105,6 +105,7 @@ dependencies {
   compile localGroovy()
   
   compile 'commons-codec:commons-codec:1.12'
+  compile 'org.apache.commons:commons-compress:1.19'
 
   compile 'com.netflix.nebula:gradle-extra-configurations-plugin:3.0.3'
   compile 'com.netflix.nebula:nebula-publishing-plugin:4.4.4'

buildSrc/settings.gradle

@@ -1 +1,2 @@
 include 'reaper'
+include 'symbolic-link-preserving-tar'

buildSrc/src/main/groovy/org/elasticsearch/gradle/doc/DocsTestPlugin.groovy

@@ -21,19 +21,21 @@ package org.elasticsearch.gradle.doc
 import org.elasticsearch.gradle.OS
 import org.elasticsearch.gradle.Version
 import org.elasticsearch.gradle.VersionProperties
-import org.elasticsearch.gradle.test.RestTestPlugin
+import org.gradle.api.Plugin
 import org.gradle.api.Project
 import org.gradle.api.Task
+
 /**
  * Sets up tests for documentation.
  */
-public class DocsTestPlugin extends RestTestPlugin {
+class DocsTestPlugin implements Plugin<Project> {
 
     @Override
-    public void apply(Project project) {
+    void apply(Project project) {
         project.pluginManager.apply('elasticsearch.testclusters')
         project.pluginManager.apply('elasticsearch.standalone-rest-test')
-        super.apply(project)
+        project.pluginManager.apply('elasticsearch.rest-test')
+
         String distribution = System.getProperty('tests.distribution', 'default')
         // The distribution can be configured with -Dtests.distribution on the command line
         project.testClusters.integTest.testDistribution = distribution.toUpperCase()

buildSrc/src/main/groovy/org/elasticsearch/gradle/test/ClusterFormationTasks.groovy

@@ -687,9 +687,7 @@ class ClusterFormationTasks {
     static Task configureExecTask(String name, Project project, Task setup, NodeInfo node, Object[] execArgs) {
         return project.tasks.create(name: name, type: LoggedExec, dependsOn: setup) { Exec exec ->
             exec.workingDir node.cwd
-            if ((project.isRuntimeJavaHomeSet && node.isBwcNode == false) // runtime Java might not be compatible with old nodes
-                    || node.nodeVersion.before(Version.fromString("7.0.0"))
-                    || node.config.distribution == 'integ-test-zip') {
+            if (useRuntimeJava(project, node)) {
                 exec.environment.put('JAVA_HOME', project.runtimeJavaHome)
             } else {
                 // force JAVA_HOME to *not* be set
@@ -707,6 +705,12 @@ class ClusterFormationTasks {
         }
     }
 
+    public static boolean useRuntimeJava(Project project, NodeInfo node) {
+        return (project.isRuntimeJavaHomeSet ||
+                (node.isBwcNode == false && node.nodeVersion.before(Version.fromString("7.0.0"))) ||
+                node.config.distribution == 'integ-test-zip')
+    }
+
     /** Adds a task to start an elasticsearch node with the given configuration */
     static Task configureStartTask(String name, Project project, Task setup, NodeInfo node) {
         // this closure is converted into ant nodes by groovy's AntBuilder
@@ -714,9 +718,7 @@ class ClusterFormationTasks {
             ant.exec(executable: node.executable, spawn: node.config.daemonize, newenvironment: true,
                      dir: node.cwd, taskname: 'elasticsearch') {
                 node.env.each { key, value -> env(key: key, value: value) }
-                if ((project.isRuntimeJavaHomeSet && node.isBwcNode == false) // runtime Java might not be compatible with old nodes
-                        || node.nodeVersion.before(Version.fromString("7.0.0"))
-                        || node.config.distribution == 'integ-test-zip') {
+                if (useRuntimeJava(project, node)) {
                     env(key: 'JAVA_HOME', value: project.runtimeJavaHome)
                 }
                 node.args.each { arg(value: it) }

buildSrc/src/main/groovy/org/elasticsearch/gradle/test/DistroTestPlugin.java

@@ -66,6 +66,7 @@ import static org.elasticsearch.gradle.vagrant.VagrantMachine.convertWindowsPath
 public class DistroTestPlugin implements Plugin<Project> {
 
     private static final String GRADLE_JDK_VERSION = "12.0.1+12@69cfe15208a647278a19ef0990eea691";
+    private static final String GRADLE_JDK_VENDOR = "openjdk";
 
     // all distributions used by distro tests. this is temporary until tests are per distribution
     private static final String DISTRIBUTIONS_CONFIGURATION = "distributions";
@@ -138,8 +139,10 @@ public class DistroTestPlugin implements Plugin<Project> {
         });
     }
 
-    private static Jdk createJdk(NamedDomainObjectContainer<Jdk> jdksContainer, String name, String version, String platform) {
+    private static Jdk createJdk(
+        NamedDomainObjectContainer<Jdk> jdksContainer, String name, String vendor, String version, String platform) {
         Jdk jdk = jdksContainer.create(name);
+        jdk.setVendor(vendor);
         jdk.setVersion(version);
         jdk.setPlatform(platform);
         return jdk;
@@ -174,7 +177,7 @@ public class DistroTestPlugin implements Plugin<Project> {
 
         NamedDomainObjectContainer<Jdk> jdksContainer = JdkDownloadPlugin.getContainer(project);
         String platform = box.contains("windows") ? "windows" : "linux";
-        Jdk gradleJdk = createJdk(jdksContainer, "gradle", GRADLE_JDK_VERSION, platform);
+        Jdk gradleJdk = createJdk(jdksContainer, "gradle", GRADLE_JDK_VENDOR, GRADLE_JDK_VERSION, platform);
 
         // setup VM used by these tests
         VagrantExtension vagrant = project.getExtensions().getByType(VagrantExtension.class);

buildSrc/src/main/groovy/org/elasticsearch/gradle/test/RestIntegTestTask.groovy

@@ -22,10 +22,12 @@ import org.elasticsearch.gradle.VersionProperties
 import org.elasticsearch.gradle.testclusters.ElasticsearchCluster
 import org.elasticsearch.gradle.testclusters.RestTestRunnerTask
 import org.elasticsearch.gradle.testclusters.TestClustersPlugin
+import org.elasticsearch.gradle.tool.Boilerplate
 import org.elasticsearch.gradle.tool.ClasspathUtils
 import org.gradle.api.DefaultTask
 import org.gradle.api.Task
 import org.gradle.api.execution.TaskExecutionAdapter
+import org.gradle.api.file.FileCopyDetails
 import org.gradle.api.logging.Logger
 import org.gradle.api.logging.Logging
 import org.gradle.api.tasks.Copy
@@ -39,6 +41,7 @@ import org.gradle.process.CommandLineArgumentProvider
 import java.nio.charset.StandardCharsets
 import java.nio.file.Files
 import java.util.stream.Stream
+
 /**
  * A wrapper task around setting up a cluster and running rest tests.
  */
@@ -121,9 +124,9 @@ class RestIntegTestTask extends DefaultTask {
             runner.systemProperty('test.cluster', System.getProperty("tests.cluster"))
         }
 
-        // copy the rest spec/tests into the test resources
-        Task copyRestSpec = createCopyRestSpecTask()
-        runner.dependsOn(copyRestSpec)
+        // copy the rest spec/tests onto the test classpath
+        Copy copyRestSpec = createCopyRestSpecTask()
+        project.sourceSets.test.output.builtBy(copyRestSpec)
 
         // this must run after all projects have been configured, so we know any project
         // references can be accessed as a fully configured
@@ -222,40 +225,28 @@ class RestIntegTestTask extends DefaultTask {
 
     }
 
-    /**
-     * Creates a task (if necessary) to copy the rest spec files.
-     *
-     * @param project The project to add the copy task to
-     * @param includePackagedTests true if the packaged tests should be copied, false otherwise
-     */
-    Task createCopyRestSpecTask() {
-        project.configurations {
-            restSpec
-        }
-        project.dependencies {
-            restSpec ClasspathUtils.isElasticsearchProject() ? project.project(':rest-api-spec') :
+    Copy createCopyRestSpecTask() {
+        Boilerplate.maybeCreate(project.configurations, 'restSpec') {
+            project.dependencies.add(
+                    'restSpec',
+                    ClasspathUtils.isElasticsearchProject() ? project.project(':rest-api-spec') :
                             "org.elasticsearch:rest-api-spec:${VersionProperties.elasticsearch}"
+            )
         }
-        Task copyRestSpec = project.tasks.findByName('copyRestSpec')
-        if (copyRestSpec != null) {
-            return copyRestSpec
-        }
-        Map copyRestSpecProps = [
-                name     : 'copyRestSpec',
-                type     : Copy,
-                dependsOn: [project.configurations.restSpec, 'processTestResources']
-        ]
-        copyRestSpec = project.tasks.create(copyRestSpecProps) {
-            into project.sourceSets.test.output.resourcesDir
-        }
-        project.afterEvaluate {
-            copyRestSpec.from({ project.zipTree(project.configurations.restSpec.singleFile) }) {
-                include 'rest-api-spec/api/**'
-                if (includePackaged) {
-                    include 'rest-api-spec/test/**'
+
+        return Boilerplate.maybeCreate(project.tasks, 'copyRestSpec', Copy) { Copy copy ->
+            copy.dependsOn project.configurations.restSpec
+            copy.into(project.sourceSets.test.output.resourcesDir)
+            copy.from({ project.zipTree(project.configurations.restSpec.singleFile) }) {
+                includeEmptyDirs = false
+                include 'rest-api-spec/**'
+                filesMatching('rest-api-spec/test/**') { FileCopyDetails details ->
+                    if (includePackaged == false) {
+                        details.exclude()
                     }
                 }
             }
+
             if (project.plugins.hasPlugin(IdeaPlugin)) {
                 project.idea {
                     module {
@@ -265,7 +256,6 @@ class RestIntegTestTask extends DefaultTask {
                     }
                 }
             }
-        return copyRestSpec
         }
-
+    }
 }

buildSrc/src/main/java/org/elasticsearch/gradle/EmptyDirTask.java

@@ -25,7 +25,7 @@ import javax.inject.Inject;
 import org.gradle.api.DefaultTask;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.TaskAction;
-import org.gradle.internal.nativeintegration.filesystem.Chmod;
+import org.gradle.internal.file.Chmod;
 
 /**
  * Creates an empty directory.

buildSrc/src/main/java/org/elasticsearch/gradle/Jdk.java

@@ -34,19 +34,22 @@ import java.util.regex.Pattern;
 
 public class Jdk implements Buildable, Iterable<File> {
 
-    static final Pattern VERSION_PATTERN = Pattern.compile("(\\d+)(\\.\\d+\\.\\d+)?\\+(\\d+)(@([a-f0-9]{32}))?");
-    private static final List<String> ALLOWED_PLATFORMS = Collections.unmodifiableList(Arrays.asList("linux", "windows", "darwin"));
+    private static final List<String> ALLOWED_VENDORS = Collections.unmodifiableList(Arrays.asList("adoptopenjdk", "openjdk"));
+    static final Pattern VERSION_PATTERN =
+        Pattern.compile("(\\d+)(\\.\\d+\\.\\d+)?\\+(\\d+(?:\\.\\d+)?)(@([a-f0-9]{32}))?");
+    private static final List<String> ALLOWED_PLATFORMS = Collections.unmodifiableList(Arrays.asList("darwin", "linux", "windows"));
 
     private final String name;
     private final Configuration configuration;
 
+    private final Property<String> vendor;
     private final Property<String> version;
     private final Property<String> platform;
 
-
     Jdk(String name, Project project) {
         this.name = name;
         this.configuration = project.getConfigurations().create("jdk_" + name);
+        this.vendor = project.getObjects().property(String.class);
         this.version = project.getObjects().property(String.class);
         this.platform = project.getObjects().property(String.class);
     }
@@ -55,6 +58,17 @@ public class Jdk implements Buildable, Iterable<File> {
         return name;
     }
 
+    public String getVendor() {
+        return vendor.get();
+    }
+
+    public void setVendor(final String vendor) {
+        if (ALLOWED_VENDORS.contains(vendor) == false) {
+            throw new IllegalArgumentException("unknown vendor [" + vendor + "] for jdk [" + name + "], must be one of " + ALLOWED_VENDORS);
+        }
+        this.vendor.set(vendor);
+    }
+
     public String getVersion() {
         return version.get();
     }
@@ -105,12 +119,17 @@ public class Jdk implements Buildable, Iterable<File> {
         if (platform.isPresent() == false) {
             throw new IllegalArgumentException("platform not specified for jdk [" + name + "]");
         }
+        if (vendor.isPresent() == false) {
+            throw new IllegalArgumentException("vendor not specified for jdk [" + name + "]");
+        }
         version.finalizeValue();
         platform.finalizeValue();
+        vendor.finalizeValue();;
     }
 
     @Override
     public Iterator<File> iterator() {
         return configuration.iterator();
     }
+
 }

buildSrc/src/main/java/org/elasticsearch/gradle/JdkDownloadPlugin.java

@@ -19,6 +19,7 @@
 
 package org.elasticsearch.gradle;
 
+import org.elasticsearch.gradle.tar.SymbolicLinkPreservingUntarTask;
 import org.gradle.api.Action;
 import org.gradle.api.NamedDomainObjectContainer;
 import org.gradle.api.Plugin;
@@ -31,12 +32,15 @@ import org.gradle.api.artifacts.dsl.DependencyHandler;
 import org.gradle.api.artifacts.dsl.RepositoryHandler;
 import org.gradle.api.artifacts.repositories.IvyArtifactRepository;
 import org.gradle.api.file.CopySpec;
+import org.gradle.api.file.Directory;
 import org.gradle.api.file.FileTree;
 import org.gradle.api.file.RelativePath;
+import org.gradle.api.provider.Provider;
 import org.gradle.api.tasks.Copy;
-import org.gradle.api.tasks.TaskProvider;
 
 import java.io.File;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Locale;
@@ -60,6 +64,7 @@ public class JdkDownloadPlugin implements Plugin<Project> {
         project.afterEvaluate(p -> {
             for (Jdk jdk : jdksContainer) {
                 jdk.finalizeValues();
+                String vendor = jdk.getVendor();
                 String version = jdk.getVersion();
                 String platform = jdk.getPlatform();
 
@@ -67,18 +72,21 @@ public class JdkDownloadPlugin implements Plugin<Project> {
                 DependencyHandler dependencies = project.getDependencies();
                 Map<String, Object> depConfig = new HashMap<>();
                 depConfig.put("path", ":"); // root project
-                depConfig.put("configuration", configName("extracted_jdk", version, platform));
+                depConfig.put("configuration", configName("extracted_jdk", vendor, version, platform));
                 dependencies.add(jdk.getConfiguration().getName(), dependencies.project(depConfig));
 
                 // ensure a root level jdk download task exists
-                setupRootJdkDownload(project.getRootProject(), platform, version);
+                setupRootJdkDownload(project.getRootProject(), platform, vendor, version);
             }
         });
 
         // all other repos should ignore the special jdk artifacts
         project.getRootProject().getRepositories().all(repo -> {
             if (repo.getName().startsWith(REPO_NAME_PREFIX) == false) {
-                repo.content(content -> content.excludeGroup("jdk"));
+                repo.content(content -> {
+                    content.excludeGroup("adoptopenjdk");
+                    content.excludeGroup("openjdk");
+                });
             }
         });
     }
@@ -88,8 +96,8 @@ public class JdkDownloadPlugin implements Plugin<Project> {
         return (NamedDomainObjectContainer<Jdk>) project.getExtensions().getByName(CONTAINER_NAME);
     }
 
-    private static void setupRootJdkDownload(Project rootProject, String platform, String version) {
-        String extractTaskName = "extract" + capitalize(platform) + "Jdk" + version;
+    private static void setupRootJdkDownload(Project rootProject, String platform, String vendor, String version) {
+        String extractTaskName = "extract" + capitalize(platform) + "Jdk-" + vendor + "-" + version;
         // NOTE: this is *horrendous*, but seems to be the only way to check for the existence of a registered task
         try {
             rootProject.getTasks().named(extractTaskName);
@@ -111,9 +119,27 @@ public class JdkDownloadPlugin implements Plugin<Project> {
         String hash = jdkVersionMatcher.group(5);
 
         // add fake ivy repo for jdk url
-        String repoName = REPO_NAME_PREFIX + version;
+        String repoName = REPO_NAME_PREFIX + vendor + "_" + version;
         RepositoryHandler repositories = rootProject.getRepositories();
         if (rootProject.getRepositories().findByName(repoName) == null) {
+            if (vendor.equals("adoptopenjdk")) {
+                if (hash != null) {
+                    throw new IllegalArgumentException("adoptopenjdk versions do not have hashes but was [" + version + "]");
+                }
+                repositories.ivy(ivyRepo -> {
+                    ivyRepo.setName(repoName);
+                    ivyRepo.setUrl("https://artifactory.elstc.co/artifactory/oss-jdk-local/");
+                    ivyRepo.metadataSources(IvyArtifactRepository.MetadataSources::artifact);
+                    final String pattern = String.format(
+                        Locale.ROOT,
+                        "adoptopenjdk/OpenJDK%sU-jdk_x64_[module]_hotspot_[revision]_%s.[ext]",
+                        jdkMajor,
+                        jdkBuild);
+                    ivyRepo.patternLayout(layout -> layout.artifact(pattern));
+                    ivyRepo.content(content -> content.includeGroup("adoptopenjdk"));
+                });
+            } else {
+                assert vendor.equals("openjdk") : vendor;
                 if (hash != null) {
                     // current pattern since 12.0.1
                     repositories.ivy(ivyRepo -> {
@@ -122,7 +148,7 @@ public class JdkDownloadPlugin implements Plugin<Project> {
                         ivyRepo.metadataSources(IvyArtifactRepository.MetadataSources::artifact);
                         ivyRepo.patternLayout(layout -> layout.artifact(
                             "java/GA/jdk" + jdkVersion + "/" + hash + "/" + jdkBuild + "/GPL/openjdk-[revision]_[module]-x64_bin.[ext]"));
-                    ivyRepo.content(content -> content.includeGroup("jdk"));
+                        ivyRepo.content(content -> content.includeGroup("openjdk"));
                     });
                 } else {
                     // simpler legacy pattern from JDK 9 to JDK 12 that we are advocating to Oracle to bring back
@@ -132,62 +158,123 @@ public class JdkDownloadPlugin implements Plugin<Project> {
                         ivyRepo.metadataSources(IvyArtifactRepository.MetadataSources::artifact);
                         ivyRepo.patternLayout(layout ->
                             layout.artifact("java/GA/jdk" + jdkMajor + "/" + jdkBuild + "/GPL/openjdk-[revision]_[module]-x64_bin.[ext]"));
-                    ivyRepo.content(content -> content.includeGroup("jdk"));
+                        ivyRepo.content(content -> content.includeGroup("openjdk"));
                     });
                 }
             }
+        }
 
         // add the jdk as a "dependency"
         final ConfigurationContainer configurations = rootProject.getConfigurations();
-        String remoteConfigName = configName("openjdk", version, platform);
-        String localConfigName = configName("extracted_jdk", version, platform);
+        String remoteConfigName = configName(vendor, version, platform);
+        String localConfigName = configName("extracted_jdk", vendor, version, platform);
         Configuration jdkConfig = configurations.findByName(remoteConfigName);
         if (jdkConfig == null) {
             jdkConfig = configurations.create(remoteConfigName);
             configurations.create(localConfigName);
         }
+        String platformDep = platform.equals("darwin") ? (vendor.equals("adoptopenjdk") ? "mac" : "osx") : platform;
         String extension = platform.equals("windows") ? "zip" : "tar.gz";
-        String jdkDep = "jdk:" + (platform.equals("darwin") ? "osx" : platform) + ":" + jdkVersion + "@" + extension;
-        rootProject.getDependencies().add(configName("openjdk", version, platform), jdkDep);
+        String jdkDep = vendor + ":" + platformDep + ":" + jdkVersion + "@" + extension;
+        rootProject.getDependencies().add(configName(vendor, version, platform), jdkDep);
 
         // add task for extraction
+        final Provider<Directory> extractPath =
+            rootProject.getLayout().getBuildDirectory().dir("jdks/" + vendor + "-" + jdkVersion + "_" + platform);
+
+        // delay resolving jdkConfig until runtime
+        Supplier<File> jdkArchiveGetter = jdkConfig::getSingleFile;
+        final Object extractTask;
+        if (extension.equals("zip")) {
+            final Callable<FileTree> fileGetter = () -> rootProject.zipTree(jdkArchiveGetter.get());
             // TODO: look into doing this as an artifact transform, which are cacheable starting in gradle 5.3
-        int rootNdx = platform.equals("darwin") ? 2 : 1;
             Action<CopySpec> removeRootDir = copy -> {
                 // remove extra unnecessary directory levels
                 copy.eachFile(details -> {
+                    /*
+                     * We want to remove up to the and including the jdk-.* relative paths. That is a JDK archive is structured as:
+                     *   jdk-12.0.1/
+                     *   jdk-12.0.1/Contents
+                     *   ...
+                     *
+                     * and we want to remove the leading jdk-12.0.1. Note however that there could also be a leading ./ as in
+                     *   ./
+                     *   ./jdk-12.0.1/
+                     *   ./jdk-12.0.1/Contents
+                     *
+                     * so we account for this and search the path components until we find the jdk-12.0.1, and strip the leading components.
+                     */
                     String[] pathSegments = details.getRelativePath().getSegments();
-                String[] newPathSegments = Arrays.copyOfRange(pathSegments, rootNdx, pathSegments.length);
+                    int index = 0;
+                    for (; index < pathSegments.length; index++) {
+                        if (pathSegments[index].matches("jdk-.*")) break;
+                    }
+                    assert index + 1 <= pathSegments.length;
+                    String[] newPathSegments = Arrays.copyOfRange(pathSegments, index + 1, pathSegments.length);
                     details.setRelativePath(new RelativePath(true, newPathSegments));
                 });
                 copy.setIncludeEmptyDirs(false);
             };
-        // delay resolving jdkConfig until runtime
-        Supplier<File> jdkArchiveGetter = jdkConfig::getSingleFile;
-        final Callable<FileTree> fileGetter;
-        if (extension.equals("zip")) {
-            fileGetter = () -> rootProject.zipTree(jdkArchiveGetter.get());
-        } else {
-            fileGetter = () -> rootProject.tarTree(rootProject.getResources().gzip(jdkArchiveGetter.get()));
-        }
-        String extractDir = rootProject.getBuildDir().toPath().resolve("jdks/openjdk-" + jdkVersion + "_" + platform).toString();
-        TaskProvider<Copy> extractTask = rootProject.getTasks().register(extractTaskName, Copy.class, copyTask -> {
+            extractTask = rootProject.getTasks().register(extractTaskName, Copy.class, copyTask -> {
                 copyTask.doFirst(new Action<Task>() {
                     @Override
                     public void execute(Task t) {
-                    rootProject.delete(extractDir);
+                        rootProject.delete(extractPath);
                     }
                 });
-            copyTask.into(extractDir);
+                copyTask.into(extractPath);
                 copyTask.from(fileGetter, removeRootDir);
             });
+        } else {
+            /*
+             * Gradle TarFileTree does not resolve symlinks, so we have to manually extract and preserve the symlinks.
+             * cf. https://github.com/gradle/gradle/issues/3982 and https://discuss.gradle.org/t/tar-and-untar-losing-symbolic-links/2039
+             */
+            final Configuration jdkConfiguration = jdkConfig;
+            extractTask = rootProject.getTasks().register(extractTaskName, SymbolicLinkPreservingUntarTask.class, task -> {
+                task.getTarFile().set(jdkConfiguration.getSingleFile());
+                task.getExtractPath().set(extractPath);
+                task.setTransform(
+                    name -> {
+                        /*
+                         * We want to remove up to the and including the jdk-.* relative paths. That is a JDK archive is structured as:
+                         *   jdk-12.0.1/
+                         *   jdk-12.0.1/Contents
+                         *   ...
+                         *
+                         * and we want to remove the leading jdk-12.0.1. Note however that there could also be a leading ./ as in
+                         *   ./
+                         *   ./jdk-12.0.1/
+                         *   ./jdk-12.0.1/Contents
+                         *
+                         * so we account for this and search the path components until we find the jdk-12.0.1, and strip the leading
+                         * components.
+                         */
+                        final Path entryName = Paths.get(name);
+                        int index = 0;
+                        for (; index < entryName.getNameCount(); index++) {
+                            if (entryName.getName(index).toString().matches("jdk-.*")) break;
+                        }
+                        if (index + 1 >= entryName.getNameCount()) {
+                            // this happens on the top-level directories in the archive, which we are removing
+                            return null;
+                        }
+                        // finally remove the top-level directories from the output path
+                        return entryName.subpath(index + 1, entryName.getNameCount());
+                    });
+            });
+        }
         rootProject.getArtifacts().add(localConfigName,
-            rootProject.getLayout().getProjectDirectory().dir(extractDir),
+            extractPath,
             artifact -> artifact.builtBy(extractTask));
     }
 
-    private static String configName(String prefix, String version, String platform) {
-        return prefix + "_" + version + "_" + platform;
+    private static String configName(String vendor, String version, String platform) {
+        return vendor + "_" + version + "_" + platform;
+    }
+
+    private static String configName(String prefix, String vendor, String version, String platform) {
+        return prefix + "_" + vendor + "_" + version + "_" + platform;
     }
 
     private static String capitalize(String s) {

buildSrc/src/main/java/org/elasticsearch/gradle/info/GenerateGlobalBuildInfoTask.java

@@ -120,9 +120,9 @@ public class GenerateGlobalBuildInfoTask extends DefaultTask {
 
     @TaskAction
     public void generate() {
-        String javaVendor = System.getProperty("java.vendor");
+        String javaVendorVersion = System.getProperty("java.vendor.version", System.getProperty("java.vendor"));
         String gradleJavaVersion = System.getProperty("java.version");
-        String gradleJavaVersionDetails = javaVendor + " " + gradleJavaVersion + " [" + System.getProperty("java.vm.name")
+        String gradleJavaVersionDetails = javaVendorVersion + " " + gradleJavaVersion + " [" + System.getProperty("java.vm.name")
             + " " + System.getProperty("java.vm.version") + "]";
 
         String compilerJavaVersionDetails = gradleJavaVersionDetails;
@@ -231,8 +231,10 @@ public class GenerateGlobalBuildInfoTask extends DefaultTask {
      */
     private String findJavaVersionDetails(File javaHome) {
         String versionInfoScript = "print(" +
-            "java.lang.System.getProperty(\"java.vendor\") + \" \" + java.lang.System.getProperty(\"java.version\") + " +
-            "\" [\" + java.lang.System.getProperty(\"java.vm.name\") + \" \" + java.lang.System.getProperty(\"java.vm.version\") + \"]\");";
+            "java.lang.System.getProperty(\"java.vendor.version\", java.lang.System.getProperty(\"java.vendor\")) + \" \" + " +
+            "java.lang.System.getProperty(\"java.version\") + \" [\" + " +
+            "java.lang.System.getProperty(\"java.vm.name\") + \" \" + " +
+            "java.lang.System.getProperty(\"java.vm.version\") + \"]\");";
         return runJavaAsScript(javaHome, versionInfoScript).trim();
     }
 

buildSrc/src/main/java/org/elasticsearch/gradle/info/GlobalBuildInfoPlugin.java

@@ -95,6 +95,7 @@ public class GlobalBuildInfoPlugin implements Plugin<Project> {
             ext.set("gradleJavaVersion", Jvm.current().getJavaVersion());
             ext.set("gitRevision", gitRevision(project.getRootProject().getRootDir()));
             ext.set("buildDate", ZonedDateTime.now(ZoneOffset.UTC));
+            ext.set("isCi", System.getenv("JENKINS_URL") != null);
         });
     }
 

buildSrc/src/main/java/org/elasticsearch/gradle/tar/SymbolicLinkPreservingTar.java

@@ -0,0 +1,211 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.gradle.tar;
+
+import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
+import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
+import org.apache.commons.compress.archivers.tar.TarConstants;
+import org.apache.commons.compress.archivers.zip.UnixStat;
+import org.gradle.api.GradleException;
+import org.gradle.api.file.FileCopyDetails;
+import org.gradle.api.file.RegularFile;
+import org.gradle.api.internal.file.CopyActionProcessingStreamAction;
+import org.gradle.api.internal.file.archive.compression.ArchiveOutputStreamFactory;
+import org.gradle.api.internal.file.archive.compression.Bzip2Archiver;
+import org.gradle.api.internal.file.archive.compression.GzipArchiver;
+import org.gradle.api.internal.file.archive.compression.SimpleCompressor;
+import org.gradle.api.internal.file.copy.CopyAction;
+import org.gradle.api.internal.file.copy.CopyActionProcessingStream;
+import org.gradle.api.internal.file.copy.FileCopyDetailsInternal;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.WorkResult;
+import org.gradle.api.tasks.WorkResults;
+import org.gradle.api.tasks.bundling.Tar;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * A custom archive task that assembles a tar archive that preserves symbolic links.
+ *
+ * This task is necessary because the built-in task {@link org.gradle.api.tasks.bundling.Tar} does not preserve symbolic links.
+ */
+public class SymbolicLinkPreservingTar extends Tar {
+
+    @Override
+    protected CopyAction createCopyAction() {
+        final ArchiveOutputStreamFactory compressor;
+        switch (getCompression()) {
+            case BZIP2:
+                compressor = Bzip2Archiver.getCompressor();
+                break;
+            case GZIP:
+                compressor = GzipArchiver.getCompressor();
+                break;
+            default:
+                compressor = new SimpleCompressor();
+                break;
+        }
+        return new SymbolicLinkPreservingTarCopyAction(getArchiveFile(), compressor, isPreserveFileTimestamps());
+    }
+
+    private static class SymbolicLinkPreservingTarCopyAction implements CopyAction {
+
+        private final Provider<RegularFile> tarFile;
+        private final ArchiveOutputStreamFactory compressor;
+        private final boolean isPreserveFileTimestamps;
+
+        SymbolicLinkPreservingTarCopyAction(
+            final Provider<RegularFile> tarFile,
+            final ArchiveOutputStreamFactory compressor,
+            final boolean isPreserveFileTimestamps) {
+            this.tarFile = tarFile;
+            this.compressor = compressor;
+            this.isPreserveFileTimestamps = isPreserveFileTimestamps;
+        }
+
+        @Override
+        public WorkResult execute(final CopyActionProcessingStream stream) {
+            try (OutputStream out = compressor.createArchiveOutputStream(tarFile.get().getAsFile());
+                TarArchiveOutputStream tar = new TarArchiveOutputStream(out)) {
+                tar.setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU);
+                stream.process(new SymbolicLinkPreservingTarStreamAction(tar));
+            } catch (final IOException e) {
+                throw new GradleException("failed writing tar file [" + tarFile + "]", e);
+            }
+
+            return WorkResults.didWork(true);
+        }
+
+        private class SymbolicLinkPreservingTarStreamAction implements CopyActionProcessingStreamAction {
+
+            private final TarArchiveOutputStream tar;
+
+            /*
+             * When Gradle walks the file tree, it will follow symbolic links. This means that if there is a symbolic link to a directory
+             * in the source file tree, we could otherwise end up duplicating the entries below that directory in the resulting tar archive.
+             * To avoid this, we track which symbolic links we have visited, and skip files that are children of symbolic links that we have
+             * already visited.
+             */
+            private final Set<File> visitedSymbolicLinks = new HashSet<>();
+
+            SymbolicLinkPreservingTarStreamAction(final TarArchiveOutputStream tar) {
+                this.tar = tar;
+            }
+
+            @Override
+            public void processFile(final FileCopyDetailsInternal details) {
+                if (isChildOfVisitedSymbolicLink(details) == false) {
+                    if (isSymbolicLink(details)) {
+                        visitSymbolicLink(details);
+                    } else if (details.isDirectory()) {
+                        visitDirectory(details);
+                    } else {
+                        visitFile(details);
+                    }
+                }
+            }
+
+            private boolean isChildOfVisitedSymbolicLink(final FileCopyDetailsInternal details) {
+                final File file;
+                try {
+                    file = details.getFile();
+                } catch (final UnsupportedOperationException e) {
+                    // we get invoked with stubbed details, there is no way to introspect this other than catching this exception
+                    return false;
+                }
+                for (final File symbolicLink : visitedSymbolicLinks) {
+                    if (isChildOf(symbolicLink, file)) return true;
+                }
+                return false;
+            }
+
+            private boolean isChildOf(final File directory, final File file) {
+                return file.toPath().startsWith(directory.toPath());
+            }
+
+            private boolean isSymbolicLink(final FileCopyDetailsInternal details) {
+                final File file;
+                try {
+                    file = details.getFile();
+                } catch (final UnsupportedOperationException e) {
+                    // we get invoked with stubbed details, there is no way to introspect this other than catching this exception
+                    return false;
+                }
+                return Files.isSymbolicLink(file.toPath());
+            }
+
+            private void visitSymbolicLink(final FileCopyDetailsInternal details) {
+                visitedSymbolicLinks.add(details.getFile());
+                final TarArchiveEntry entry = new TarArchiveEntry(details.getRelativePath().getPathString(), TarConstants.LF_SYMLINK);
+                entry.setModTime(getModTime(details));
+                entry.setMode(UnixStat.LINK_FLAG | details.getMode());
+                try {
+                    entry.setLinkName(Files.readSymbolicLink(details.getFile().toPath()).toString());
+                    tar.putArchiveEntry(entry);
+                    tar.closeArchiveEntry();
+                } catch (final IOException e) {
+                    handleProcessingException(details, e);
+                }
+            }
+
+            private void visitDirectory(final FileCopyDetailsInternal details) {
+                final TarArchiveEntry entry = new TarArchiveEntry(details.getRelativePath().getPathString() + "/");
+                entry.setModTime(getModTime(details));
+                entry.setMode(UnixStat.DIR_FLAG | details.getMode());
+                try {
+                    tar.putArchiveEntry(entry);
+                    tar.closeArchiveEntry();
+                } catch (final IOException e) {
+                    handleProcessingException(details, e);
+                }
+            }
+
+            private void visitFile(final FileCopyDetailsInternal details) {
+                final TarArchiveEntry entry = new TarArchiveEntry(details.getRelativePath().getPathString());
+                entry.setModTime(getModTime(details));
+                entry.setMode(UnixStat.FILE_FLAG | details.getMode());
+                entry.setSize(details.getSize());
+                try {
+                    tar.putArchiveEntry(entry);
+                    details.copyTo(tar);
+                    tar.closeArchiveEntry();
+                } catch (final IOException e) {
+                    handleProcessingException(details, e);
+                }
+            }
+
+            private void handleProcessingException(final FileCopyDetailsInternal details, final IOException e) {
+                throw new GradleException("could not add [" + details + "] to tar file [" + tarFile + "]", e);
+            }
+
+        }
+
+        private long getModTime(final FileCopyDetails details) {
+            return isPreserveFileTimestamps ? details.getLastModified() : 0;
+        }
+
+    }
+
+}

buildSrc/src/main/java/org/elasticsearch/gradle/tar/SymbolicLinkPreservingUntarTask.java

@@ -0,0 +1,162 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.gradle.tar;
+
+import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
+import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
+import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
+import org.gradle.api.DefaultTask;
+import org.gradle.api.GradleException;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.InputFile;
+import org.gradle.api.tasks.OutputDirectory;
+import org.gradle.api.tasks.TaskAction;
+
+import javax.inject.Inject;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.attribute.PosixFileAttributeView;
+import java.nio.file.attribute.PosixFilePermission;
+import java.nio.file.attribute.PosixFilePermissions;
+import java.util.Set;
+import java.util.function.Function;
+
+/**
+ * A custom task that explodes a tar archive that preserves symbolic links.
+ *
+ * This task is necessary because the built-in task {@link org.gradle.api.internal.file.archive.TarFileTree} does not preserve symbolic
+ * links.
+ */
+public class SymbolicLinkPreservingUntarTask extends DefaultTask {
+
+    private final RegularFileProperty tarFile;
+
+    @InputFile
+    public RegularFileProperty getTarFile() {
+        return tarFile;
+    }
+
+    private final DirectoryProperty extractPath;
+
+    @OutputDirectory
+    public DirectoryProperty getExtractPath() {
+        return extractPath;
+    }
+
+    private Function<String, Path> transform;
+
+    /**
+     * A transform to apply to the tar entry, to derive the relative path from the entry name. If the return value is null, the entry is
+     * dropped from the exploded tar archive.
+     *
+     * @param transform the transform
+     */
+    @Input
+    public void setTransform(Function<String, Path> transform) {
+        this.transform = transform;
+    }
+
+    @Inject
+    public SymbolicLinkPreservingUntarTask(final ObjectFactory objectFactory) {
+        this.tarFile = objectFactory.fileProperty();
+        this.extractPath = objectFactory.directoryProperty();
+        this.transform = name -> Paths.get(name);
+    }
+
+    @TaskAction
+    final void execute() {
+        // ensure the target extraction path is empty
+        getProject().delete(extractPath);
+        try (TarArchiveInputStream tar =
+                 new TarArchiveInputStream(new GzipCompressorInputStream(new FileInputStream(tarFile.getAsFile().get())))) {
+            final Path destinationPath = extractPath.get().getAsFile().toPath();
+            TarArchiveEntry entry = tar.getNextTarEntry();
+            while (entry != null) {
+                final Path relativePath = transform.apply(entry.getName());
+                if (relativePath == null) {
+                    entry = tar.getNextTarEntry();
+                    continue;
+                }
+
+                final Path destination = destinationPath.resolve(relativePath);
+                final Path parent = destination.getParent();
+                if (Files.exists(parent) == false) {
+                    Files.createDirectories(parent);
+                }
+                if (entry.isDirectory()) {
+                    Files.createDirectory(destination);
+                } else if (entry.isSymbolicLink()) {
+                    Files.createSymbolicLink(destination, Paths.get(entry.getLinkName()));
+                } else {
+                    // copy the file from the archive using a small buffer to avoid heaping
+                    Files.createFile(destination);
+                    try (FileOutputStream fos = new FileOutputStream(destination.toFile())) {
+                        tar.transferTo(fos);
+                    }
+                }
+                if (entry.isSymbolicLink() == false) {
+                    // check if the underlying file system supports POSIX permissions
+                    final PosixFileAttributeView view = Files.getFileAttributeView(destination, PosixFileAttributeView.class);
+                    if (view != null) {
+                        final Set<PosixFilePermission> permissions = PosixFilePermissions.fromString(
+                            permissions((entry.getMode() >> 6) & 07) +
+                                permissions((entry.getMode() >> 3) & 07) +
+                                permissions((entry.getMode() >> 0) & 07));
+                        Files.setPosixFilePermissions(destination, permissions);
+                    }
+                }
+                entry = tar.getNextTarEntry();
+            }
+        } catch (final IOException e) {
+            throw new GradleException("unable to extract tar [" + tarFile.getAsFile().get().toPath() + "]", e);
+        }
+    }
+
+    private String permissions(final int permissions) {
+        if (permissions < 0 || permissions > 7) {
+            throw new IllegalArgumentException("permissions [" + permissions + "] out of range");
+        }
+        final StringBuilder sb = new StringBuilder(3);
+        if ((permissions & 4) == 4) {
+            sb.append('r');
+        } else {
+            sb.append('-');
+        }
+        if ((permissions & 2) == 2) {
+            sb.append('w');
+        } else {
+            sb.append('-');
+        }
+        if ((permissions & 1) == 1) {
+            sb.append('x');
+        } else {
+            sb.append('-');
+        }
+        return sb.toString();
+    }
+
+}

buildSrc/src/main/java/org/elasticsearch/gradle/tar/SymoblicLinkPreservingTarPlugin.java

@@ -0,0 +1,32 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.gradle.tar;
+
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+
+public class SymoblicLinkPreservingTarPlugin implements Plugin<Project> {
+
+    @Override
+    public void apply(final Project target) {
+
+    }
+
+}

buildSrc/src/main/java/org/elasticsearch/gradle/testclusters/ElasticsearchNode.java

@@ -599,8 +599,11 @@ public class ElasticsearchNode implements TestClusterConfiguration {
                 })
                 .collect(Collectors.joining(" "));
         }
-        defaultEnv.put("ES_JAVA_OPTS", "-Xms512m -Xmx512m -ea -esa" +
-            systemPropertiesString + jvmArgsString
+        defaultEnv.put("ES_JAVA_OPTS", "-Xms512m -Xmx512m -ea -esa " +
+            systemPropertiesString + " " +
+            jvmArgsString + " " +
+            // Support  passing in additional JVM arguments
+            System.getProperty("tests.jvm.argline", "")
         );
         defaultEnv.put("ES_TMPDIR", tmpDir.toString());
         // Windows requires this as it defaults to `c:\windows` despite ES_TMPDIR

buildSrc/src/main/java/org/elasticsearch/gradle/tool/Boilerplate.java

@@ -20,6 +20,7 @@ package org.elasticsearch.gradle.tool;
 
 import org.gradle.api.Action;
 import org.gradle.api.NamedDomainObjectContainer;
+import org.gradle.api.PolymorphicDomainObjectContainer;
 import org.gradle.api.Project;
 import org.gradle.api.Task;
 import org.gradle.api.UnknownTaskException;
@@ -52,6 +53,16 @@ public abstract class Boilerplate {
 
     }
 
+    public static <T> T maybeCreate(PolymorphicDomainObjectContainer<T> collection, String name, Class<T> type, Action<T> action) {
+        return Optional.ofNullable(collection.findByName(name))
+            .orElseGet(() -> {
+                T result = collection.create(name, type);
+                action.execute(result);
+                return result;
+            });
+
+    }
+
     public static <T extends Task> TaskProvider<T> maybeRegister(TaskContainer tasks, String name, Class<T> clazz, Action<T> action) {
         try {
             return tasks.named(name, clazz);

buildSrc/src/main/resources/META-INF/gradle-plugins/elasticsearch.symbolic-link-preserving-tar.properties

@@ -0,0 +1 @@
+implementation-class=org.elasticsearch.gradle.tar.SymoblicLinkPreservingTarPlugin

buildSrc/src/main/resources/minimumGradleVersion

@@ -1 +1 @@
-5.5
+5.6.2

buildSrc/src/minimumRuntime/java/org/elasticsearch/gradle/VersionProperties.java

@@ -23,6 +23,10 @@ public class VersionProperties {
         return bundledJdk;
     }
 
+    public static String getBundledJdkVendor() {
+        return bundledJdkVendor;
+    }
+
     public static Map<String, String> getVersions() {
         return versions;
     }
@@ -30,12 +34,14 @@ public class VersionProperties {
     private static final String elasticsearch;
     private static final String lucene;
     private static final String bundledJdk;
+    private static final String bundledJdkVendor;
     private static final Map<String, String> versions = new HashMap<String, String>();
 
     static {
         Properties props = getVersionProperties();
         elasticsearch = props.getProperty("elasticsearch");
         lucene = props.getProperty("lucene");
+        bundledJdkVendor = props.getProperty("bundled_jdk_vendor");
         bundledJdk = props.getProperty("bundled_jdk");
 
         for (String property : props.stringPropertyNames()) {

buildSrc/src/test/java/org/elasticsearch/gradle/AdoptOpenJdkDownloadPluginIT.java

@@ -0,0 +1,59 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.gradle;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+public class AdoptOpenJdkDownloadPluginIT extends JdkDownloadPluginIT {
+
+    @Override
+    public String oldJdkVersion() {
+        return "1+99";
+    }
+
+    @Override
+    public String jdkVersion() {
+        return "12.0.2+10";
+    }
+
+    @Override
+    public String jdkVendor() {
+        return "adoptopenjdk";
+    }
+
+    @Override
+    protected String urlPath(final boolean isOld, final String platform, final String extension) {
+        final String module = platform.equals("osx") ? "mac" : platform;
+        if (isOld) {
+            return "/adoptopenjdk/OpenJDK1U-jdk_x64_" + module + "_hotspot_1_99." + extension;
+        } else {
+            return "/adoptopenjdk/OpenJDK12U-jdk_x64_" + module + "_hotspot_12.0.2_10." + extension;
+        }
+    }
+
+    @Override
+    protected byte[] filebytes(final String platform, final String extension) throws IOException {
+        try (InputStream stream = JdkDownloadPluginIT.class.getResourceAsStream("fake_adoptopenjdk_" + platform + "." + extension)) {
+            return stream.readAllBytes();
+        }
+    }
+
+}

buildSrc/src/test/java/org/elasticsearch/gradle/JdkDownloadPluginIT.java

@@ -25,7 +25,6 @@ import org.gradle.testkit.runner.BuildResult;
 import org.gradle.testkit.runner.GradleRunner;
 
 import java.io.IOException;
-import java.io.InputStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
@@ -39,74 +38,79 @@ import static com.github.tomakehurst.wiremock.client.WireMock.head;
 import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
 import static org.hamcrest.CoreMatchers.equalTo;
 
-public class JdkDownloadPluginIT extends GradleIntegrationTestCase {
+public abstract class JdkDownloadPluginIT extends GradleIntegrationTestCase {
 
-    private static final String OLD_JDK_VERSION = "1+99";
-    private static final String JDK_VERSION = "12.0.1+99@123456789123456789123456789abcde";
     private static final Pattern JDK_HOME_LOGLINE = Pattern.compile("JDK HOME: (.*)");
     private static final Pattern NUM_CONFIGS_LOGLINE = Pattern.compile("NUM CONFIGS: (.*)");
 
-    public void testLinuxExtraction() throws IOException {
-        assertExtraction("getLinuxJdk", "linux", "bin/java", JDK_VERSION);
+    protected abstract String oldJdkVersion();
+
+    protected abstract String jdkVersion();
+
+    protected abstract String jdkVendor();
+
+    public final void testLinuxExtraction() throws IOException {
+        assertExtraction("getLinuxJdk", "linux", "bin/java", jdkVendor(), jdkVersion());
     }
 
-    public void testDarwinExtraction() throws IOException {
-        assertExtraction("getDarwinJdk", "osx", "Contents/Home/bin/java", JDK_VERSION);
+    public final void testDarwinExtraction() throws IOException {
+        assertExtraction("getDarwinJdk", "osx", "Contents/Home/bin/java", jdkVendor(), jdkVersion());
     }
 
-    public void testWindowsExtraction() throws IOException {
-        assertExtraction("getWindowsJdk", "windows", "bin/java", JDK_VERSION);
+    public final void testWindowsExtraction() throws IOException {
+        assertExtraction("getWindowsJdk", "windows", "bin/java", jdkVendor(), jdkVersion());
     }
 
-    public void testLinuxExtractionOldVersion() throws IOException {
-        assertExtraction("getLinuxJdk", "linux", "bin/java", OLD_JDK_VERSION);
+    public final void testLinuxExtractionOldVersion() throws IOException {
+        assertExtraction("getLinuxJdk", "linux", "bin/java", jdkVendor(), oldJdkVersion());
     }
 
-    public void testDarwinExtractionOldVersion() throws IOException {
-        assertExtraction("getDarwinJdk", "osx", "Contents/Home/bin/java", OLD_JDK_VERSION);
+    public final void testDarwinExtractionOldVersion() throws IOException {
+        assertExtraction("getDarwinJdk", "osx", "Contents/Home/bin/java", jdkVendor(), oldJdkVersion());
     }
 
-    public void testWindowsExtractionOldVersion() throws IOException {
-        assertExtraction("getWindowsJdk", "windows", "bin/java", OLD_JDK_VERSION);
+    public final void testWindowsExtractionOldVersion() throws IOException {
+        assertExtraction("getWindowsJdk", "windows", "bin/java", jdkVendor(), oldJdkVersion());
     }
 
-    public void testCrossProjectReuse() throws IOException {
+    public final void testCrossProjectReuse() throws IOException {
         runBuild("numConfigurations", "linux", result -> {
             Matcher matcher = NUM_CONFIGS_LOGLINE.matcher(result.getOutput());
             assertTrue("could not find num configs in output: " + result.getOutput(), matcher.find());
             assertThat(Integer.parseInt(matcher.group(1)), equalTo(6)); // 3 import configs, 3 export configs
-        }, JDK_VERSION);
+        }, jdkVendor(), jdkVersion());
     }
 
-    public void assertExtraction(String taskname, String platform, String javaBin, String version) throws IOException {
+    private void assertExtraction(String taskname, String platform, String javaBin, String vendor, String version) throws IOException {
         runBuild(taskname, platform, result -> {
             Matcher matcher = JDK_HOME_LOGLINE.matcher(result.getOutput());
             assertTrue("could not find jdk home in output: " + result.getOutput(), matcher.find());
             String jdkHome = matcher.group(1);
             Path javaPath = Paths.get(jdkHome, javaBin);
             assertTrue(javaPath.toString(), Files.exists(javaPath));
-        }, version);
+        }, vendor, version);
     }
 
-    private void runBuild(String taskname, String platform, Consumer<BuildResult> assertions, String version) throws IOException {
+    protected abstract String urlPath(boolean isOld, String platform, String extension);
+
+    protected abstract byte[] filebytes(String platform, String extension) throws IOException;
+
+    private void runBuild(
+        String taskname, String platform, Consumer<BuildResult> assertions, String vendor, String version) throws IOException {
         WireMockServer wireMock = new WireMockServer(0);
         try {
             String extension = platform.equals("windows") ? "zip" : "tar.gz";
-            boolean isOld = version.equals(OLD_JDK_VERSION);
-            String filename = "openjdk-" + (isOld ? "1" : "12.0.1") + "_" + platform + "-x64_bin." + extension;
-            final byte[] filebytes;
-            try (InputStream stream = JdkDownloadPluginIT.class.getResourceAsStream("fake_openjdk_" + platform + "." + extension)) {
-                filebytes = stream.readAllBytes();
-            }
-            String versionPath = isOld ? "jdk1/99" : "jdk12.0.1/123456789123456789123456789abcde/99";
-            String urlPath = "/java/GA/" + versionPath + "/GPL/" + filename;
-            wireMock.stubFor(head(urlEqualTo(urlPath)).willReturn(aResponse().withStatus(200)));
-            wireMock.stubFor(get(urlEqualTo(urlPath)).willReturn(aResponse().withStatus(200).withBody(filebytes)));
+            boolean isOld = version.equals(oldJdkVersion());
+
+            wireMock.stubFor(head(urlEqualTo(urlPath(isOld, platform, extension))).willReturn(aResponse().withStatus(200)));
+            wireMock.stubFor(get(urlEqualTo(urlPath(isOld, platform, extension)))
+                .willReturn(aResponse().withStatus(200).withBody(filebytes(platform, extension))));
             wireMock.start();
 
             GradleRunner runner = GradleRunner.create().withProjectDir(getProjectDir("jdk-download"))
                 .withArguments(taskname,
                     "-Dlocal.repo.path=" + getLocalTestRepoPath(),
+                    "-Dtests.jdk_vendor=" + vendor,
                     "-Dtests.jdk_version=" + version,
                     "-Dtests.jdk_repo=" + wireMock.baseUrl(),
                     "-i")

buildSrc/src/test/java/org/elasticsearch/gradle/JdkDownloadPluginTests.java

@@ -35,32 +35,50 @@ public class JdkDownloadPluginTests extends GradleUnitTestCase {
          rootProject = ProjectBuilder.builder().build();
     }
 
+    public void testMissingVendor() {
+        assertJdkError(createProject(), "testjdk", null, "11.0.2+33", "linux", "vendor not specified for jdk [testjdk]");
+    }
+
+    public void testUnknownVendor() {
+        assertJdkError(
+            createProject(),
+            "testjdk",
+            "unknown",
+            "11.0.2+33",
+            "linux",
+            "unknown vendor [unknown] for jdk [testjdk], must be one of [adoptopenjdk, openjdk]");
+    }
+
     public void testMissingVersion() {
-        assertJdkError(createProject(), "testjdk", null, "linux", "version not specified for jdk [testjdk]");
-    }
-
-    public void testMissingPlatform() {
-        assertJdkError(createProject(), "testjdk", "11.0.2+33", null, "platform not specified for jdk [testjdk]");
-    }
-
-    public void testUnknownPlatform() {
-        assertJdkError(createProject(), "testjdk", "11.0.2+33", "unknown",
-            "unknown platform [unknown] for jdk [testjdk], must be one of [linux, windows, darwin]");
+        assertJdkError(createProject(), "testjdk", "openjdk", null, "linux", "version not specified for jdk [testjdk]");
     }
 
     public void testBadVersionFormat() {
-        assertJdkError(createProject(), "testjdk", "badversion", "linux", "malformed version [badversion] for jdk [testjdk]");
+        assertJdkError(createProject(), "testjdk", "openjdk", "badversion", "linux", "malformed version [badversion] for jdk [testjdk]");
     }
 
-    private void assertJdkError(Project project, String name, String version, String platform, String message) {
-        IllegalArgumentException e = expectThrows(IllegalArgumentException.class, () -> createJdk(project, name, version, platform));
+    public void testMissingPlatform() {
+        assertJdkError(createProject(), "testjdk", "openjdk", "11.0.2+33", null, "platform not specified for jdk [testjdk]");
+    }
+
+    public void testUnknownPlatform() {
+        assertJdkError(createProject(), "testjdk", "openjdk", "11.0.2+33", "unknown",
+            "unknown platform [unknown] for jdk [testjdk], must be one of [darwin, linux, windows]");
+    }
+
+    private void assertJdkError(Project project, String name, String vendor, String version, String platform, String message) {
+        IllegalArgumentException e =
+            expectThrows(IllegalArgumentException.class, () -> createJdk(project, name, vendor, version, platform));
         assertThat(e.getMessage(), equalTo(message));
     }
 
-    private void createJdk(Project project, String name, String version, String platform) {
+    private void createJdk(Project project, String name, String vendor, String version, String platform) {
         @SuppressWarnings("unchecked")
         NamedDomainObjectContainer<Jdk> jdks = (NamedDomainObjectContainer<Jdk>) project.getExtensions().getByName("jdks");
         jdks.create(name, jdk -> {
+            if (vendor != null) {
+                jdk.setVendor(vendor);
+            }
             if (version != null) {
                 jdk.setVersion(version);
             }

buildSrc/src/test/java/org/elasticsearch/gradle/OpenJdkDownloadPluginIT.java

@@ -0,0 +1,56 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.gradle;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+public class OpenJdkDownloadPluginIT extends JdkDownloadPluginIT {
+
+    @Override
+    public String oldJdkVersion() {
+        return "1+99";
+    }
+
+    @Override
+    public String jdkVersion() {
+        return "12.0.1+99@123456789123456789123456789abcde";
+    }
+
+    @Override
+    protected String jdkVendor() {
+        return "openjdk";
+    }
+
+    @Override
+    protected String urlPath(final boolean isOld, final String platform, final String extension) {
+        final String versionPath = isOld ? "jdk1/99" : "jdk12.0.1/123456789123456789123456789abcde/99";
+        final String filename = "openjdk-" + (isOld ? "1" : "12.0.1") + "_" + platform + "-x64_bin." + extension;
+        return "/java/GA/" + versionPath + "/GPL/" + filename;
+    }
+
+    @Override
+    protected byte[] filebytes(final String platform, final String extension) throws IOException {
+        try (InputStream stream = JdkDownloadPluginIT.class.getResourceAsStream("fake_openjdk_" + platform + "." + extension)) {
+            return stream.readAllBytes();
+        }
+    }
+
+}

buildSrc/src/test/java/org/elasticsearch/gradle/tar/SymbolicLinkPreservingTarIT.java

@@ -0,0 +1,157 @@
+package org.elasticsearch.gradle.tar;
+
+import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
+import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
+import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
+import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
+import org.elasticsearch.gradle.test.GradleIntegrationTestCase;
+import org.gradle.api.GradleException;
+import org.gradle.testkit.runner.GradleRunner;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.rules.TemporaryFolder;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import static org.hamcrest.CoreMatchers.anyOf;
+import static org.hamcrest.CoreMatchers.equalTo;
+
+public class SymbolicLinkPreservingTarIT extends GradleIntegrationTestCase {
+
+    @Rule
+    public final TemporaryFolder temporaryFolder = new TemporaryFolder();
+
+    @Before
+    public void before() throws IOException {
+        final Path realFolder = temporaryFolder.getRoot().toPath().resolve("real-folder");
+        Files.createDirectory(realFolder);
+        Files.createFile(realFolder.resolve("file"));
+        Files.createSymbolicLink(realFolder.resolve("link-to-file"), Paths.get("./file"));
+        final Path linkInFolder = temporaryFolder.getRoot().toPath().resolve("link-in-folder");
+        Files.createDirectory(linkInFolder);
+        Files.createSymbolicLink(linkInFolder.resolve("link-to-file"), Paths.get("../real-folder/file"));
+        final Path linkToRealFolder = temporaryFolder.getRoot().toPath().resolve("link-to-real-folder");
+        Files.createSymbolicLink(linkToRealFolder, Paths.get("./real-folder"));
+    }
+
+    public void testBZip2Tar() throws IOException {
+        runBuild("buildBZip2Tar", true);
+        assertTar(".bz2", BZip2CompressorInputStream::new, true);
+    }
+
+    public void testBZip2TarDoNotPreserveFileTimestamps() throws IOException {
+        runBuild("buildBZip2Tar", false);
+        assertTar(".bz2", BZip2CompressorInputStream::new, false);
+    }
+
+    public void testGZipTar() throws IOException {
+        runBuild("buildGZipTar", true);
+        assertTar(".gz", GzipCompressorInputStream::new, true);
+    }
+
+    public void testGZipTarDoNotPreserveFileTimestamps() throws IOException {
+        runBuild("buildGZipTar", false);
+        assertTar(".gz", GzipCompressorInputStream::new, false);
+    }
+
+    public void testTar() throws IOException {
+        runBuild("buildTar", true);
+        assertTar("", fis -> fis, true);
+    }
+
+    public void testTarDoNotPreserveFileTimestamps() throws IOException {
+        runBuild("buildTar", false);
+        assertTar("", fis -> fis, false);
+    }
+
+    interface FileInputStreamWrapper {
+        InputStream apply(FileInputStream fis) throws IOException;
+    }
+
+    private void assertTar(
+        final String extension, final FileInputStreamWrapper wrapper, boolean preserveFileTimestamps) throws IOException {
+        try (TarArchiveInputStream tar = new TarArchiveInputStream(wrapper.apply(new FileInputStream(getOutputFile(extension))))) {
+            TarArchiveEntry entry = tar.getNextTarEntry();
+            boolean realFolderEntry = false;
+            boolean fileEntry = false;
+            boolean linkToFileEntry = false;
+            boolean linkInFolderEntry = false;
+            boolean linkInFolderLinkToFileEntry = false;
+            boolean linkToRealFolderEntry = false;
+            while (entry != null) {
+                if (entry.getName().equals("real-folder/")) {
+                    assertTrue(entry.isDirectory());
+                    realFolderEntry = true;
+                } else if (entry.getName().equals("real-folder/file")) {
+                    assertTrue(entry.isFile());
+                    fileEntry = true;
+                } else if (entry.getName().equals("real-folder/link-to-file")) {
+                    assertTrue(entry.isSymbolicLink());
+                    assertThat(
+                        entry.getLinkName(),
+                        anyOf(equalTo("./file"), equalTo(".\\file"))
+                    );
+                    linkToFileEntry = true;
+                } else if (entry.getName().equals("link-in-folder/")) {
+                    assertTrue(entry.isDirectory());
+                    linkInFolderEntry = true;
+                } else if (entry.getName().equals("link-in-folder/link-to-file")) {
+                    assertTrue(entry.isSymbolicLink());
+                    assertThat(
+                        entry.getLinkName(),
+                        anyOf(equalTo("../real-folder/file"), equalTo("..\\real-folder\\file"))
+                    );
+                    linkInFolderLinkToFileEntry = true;
+                } else if (entry.getName().equals("link-to-real-folder")) {
+                    assertTrue(entry.isSymbolicLink());
+                    assertThat(
+                        entry.getLinkName(),
+                        anyOf(equalTo("./real-folder"), equalTo(".\\real-folder"))
+                    );
+                    linkToRealFolderEntry = true;
+                } else {
+                    throw new GradleException("unexpected entry [" + entry.getName() + "]");
+                }
+                if (preserveFileTimestamps) {
+                    assertTrue(entry.getModTime().getTime() > 0);
+                } else {
+                    assertThat(entry.getModTime().getTime(), equalTo(0L));
+                }
+                entry = tar.getNextTarEntry();
+            }
+            assertTrue(realFolderEntry);
+            assertTrue(fileEntry);
+            assertTrue(linkToFileEntry);
+            assertTrue(linkInFolderEntry);
+            assertTrue(linkInFolderLinkToFileEntry);
+            assertTrue(linkToRealFolderEntry);
+        }
+    }
+
+    private void runBuild(final String task, final boolean preserveFileTimestamps) {
+        final GradleRunner runner = GradleRunner.create().withProjectDir(getProjectDir())
+            .withArguments(
+                task,
+                "-Dtests.symbolic_link_preserving_tar_source=" + temporaryFolder.getRoot().toString(),
+                "-Dtests.symbolic_link_preserving_tar_preserve_file_timestamps=" + preserveFileTimestamps,
+                "-i")
+            .withPluginClasspath();
+
+        runner.build();
+    }
+
+    private File getProjectDir() {
+        return getProjectDir("symbolic-link-preserving-tar");
+    }
+
+    private File getOutputFile(final String extension) {
+        return getProjectDir().toPath().resolve("build/distributions/symbolic-link-preserving-tar.tar" + extension).toFile();
+    }
+
+}

buildSrc/src/testKit/jdk-download/build.gradle

@@ -2,9 +2,11 @@
 project.gradle.projectsEvaluated {
     // wire the jdk repo to wiremock
     String fakeJdkRepo = Objects.requireNonNull(System.getProperty('tests.jdk_repo'))
+    String fakeJdkVendor = Objects.requireNonNull(System.getProperty('tests.jdk_vendor'))
     String fakeJdkVersion = Objects.requireNonNull(System.getProperty('tests.jdk_version'))
     println rootProject.repositories.asMap.keySet()
-    IvyArtifactRepository repository = (IvyArtifactRepository) rootProject.repositories.getByName("jdk_repo_${fakeJdkVersion}")
+    IvyArtifactRepository repository =
+            (IvyArtifactRepository) rootProject.repositories.getByName("jdk_repo_${fakeJdkVendor}_${fakeJdkVersion}")
     repository.setUrl(fakeJdkRepo)
 }
 

buildSrc/src/testKit/jdk-download/reuse/build.gradle

@@ -1,8 +1,10 @@
 evaluationDependsOn ':subproj'
 
+String fakeJdkVendor = Objects.requireNonNull(System.getProperty('tests.jdk_vendor'))
 String fakeJdkVersion = Objects.requireNonNull(System.getProperty('tests.jdk_version'))
 jdks {
     linux_jdk {
+        vendor = fakeJdkVendor
         version = fakeJdkVersion
         platform = "linux"
     }

buildSrc/src/testKit/jdk-download/subproj/build.gradle

@@ -3,17 +3,21 @@ plugins {
 }
 
 
+String fakeJdkVendor = Objects.requireNonNull(System.getProperty('tests.jdk_vendor'))
 String fakeJdkVersion = Objects.requireNonNull(System.getProperty('tests.jdk_version'))
 jdks {
     linux {
+        vendor = fakeJdkVendor
         version = fakeJdkVersion
         platform = "linux"
     }
     darwin {
+        vendor = fakeJdkVendor
         version = fakeJdkVersion
         platform = "darwin"
     }
     windows {
+        vendor = fakeJdkVendor
         version = fakeJdkVersion
         platform = "windows"
     }

buildSrc/src/testKit/symbolic-link-preserving-tar/build.gradle

@@ -0,0 +1,53 @@
+import org.elasticsearch.gradle.tar.SymbolicLinkPreservingTar
+
+plugins {
+    id 'base'
+    id 'distribution'
+    id 'elasticsearch.symbolic-link-preserving-tar'
+}
+
+final String source = Objects.requireNonNull(System.getProperty('tests.symbolic_link_preserving_tar_source'))
+boolean preserveFileTimestamps;
+final String testPreserveFileTimestamps = 
+        Objects.requireNonNull(System.getProperty('tests.symbolic_link_preserving_tar_preserve_file_timestamps'))
+switch (testPreserveFileTimestamps) {
+    case "true":
+        preserveFileTimestamps = true
+        break
+    case "false":
+        preserveFileTimestamps = false
+        break
+    default:
+        throw new IllegalArgumentException(
+                "tests.symbolic_link_preserving_tar_preserve_file_timestamps must be [true] or [false] but was ["
+                        + testPreserveFileTimestamps + "]")
+}
+
+task buildBZip2Tar(type: SymbolicLinkPreservingTar) { SymbolicLinkPreservingTar tar ->
+    tar.archiveExtension = 'tar.bz2'
+    tar.compression = Compression.BZIP2
+    tar.preserveFileTimestamps = preserveFileTimestamps
+    from fileTree(source)
+    doLast {
+        println archiveFile.get().asFile.path
+    }
+}
+
+task buildGZipTar(type: SymbolicLinkPreservingTar) { SymbolicLinkPreservingTar tar ->
+    tar.archiveExtension = 'tar.gz'
+    tar.compression = Compression.GZIP
+    tar.preserveFileTimestamps = preserveFileTimestamps
+    from fileTree(source)
+    doLast{
+        println archiveFile.get().asFile.path
+    }
+}
+
+task buildTar(type: SymbolicLinkPreservingTar) { SymbolicLinkPreservingTar tar ->
+    tar.archiveExtension = 'tar'
+    tar.preserveFileTimestamps = preserveFileTimestamps
+    from fileTree(source)
+    doLast{
+        println archiveFile.get().asFile.path
+    }
+}

buildSrc/version.properties

@@ -1,7 +1,8 @@
 elasticsearch     = 7.5.0
 lucene            = 8.2.0
 
-bundled_jdk       = 12.0.2+10@e482c34c86bd4bf8b56c0b35558996b9
+bundled_jdk_vendor = adoptopenjdk
+bundled_jdk = 13+33
 
 # optional dependencies
 spatial4j         = 0.7
@@ -32,8 +33,8 @@ bouncycastle      = 1.61
 # test dependencies
 randomizedrunner  = 2.7.1
 junit             = 4.12
-httpclient        = 4.5.8
-httpcore          = 4.4.11
+httpclient        = 4.5.10
+httpcore          = 4.4.12
 httpasyncclient   = 4.1.4
 commonslogging    = 1.1.3
 commonscodec      = 1.11

client/rest-high-level/src/main/java/org/elasticsearch/client/CcrClient.java

@@ -85,15 +85,15 @@ public final class CcrClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ccr-put-follow.html">
      * the docs</a> for more.
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putFollowAsync(PutFollowRequest request,
+    public Cancellable putFollowAsync(PutFollowRequest request,
                                       RequestOptions options,
                                       ActionListener<PutFollowResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             request,
             CcrRequestConverters::putFollow,
             options,
@@ -129,15 +129,15 @@ public final class CcrClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ccr-pause-follow.html">
      * the docs</a> for more.
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void pauseFollowAsync(PauseFollowRequest request,
+    public Cancellable pauseFollowAsync(PauseFollowRequest request,
                                         RequestOptions options,
                                         ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             request,
             CcrRequestConverters::pauseFollow,
             options,
@@ -172,15 +172,15 @@ public final class CcrClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ccr-resume-follow.html">
      * the docs</a> for more.
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void resumeFollowAsync(ResumeFollowRequest request,
+    public Cancellable resumeFollowAsync(ResumeFollowRequest request,
                                          RequestOptions options,
                                          ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             request,
             CcrRequestConverters::resumeFollow,
             options,
@@ -217,15 +217,15 @@ public final class CcrClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ccr-unfollow.html">
      * the docs</a> for more.
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void unfollowAsync(UnfollowRequest request,
+    public Cancellable unfollowAsync(UnfollowRequest request,
                                      RequestOptions options,
                                      ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             request,
             CcrRequestConverters::unfollow,
             options,
@@ -260,15 +260,15 @@ public final class CcrClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ccr-forget-follower.html">the docs</a> for more details
      * on the intended usage of this API.
-     *
      * @param request the request
      * @param options the request options (e.g., headers), use {@link RequestOptions#DEFAULT} if the defaults are acceptable.
+     * @return cancellable that may be used to cancel the request
      */
-    public void forgetFollowerAsync(
+    public Cancellable forgetFollowerAsync(
             final ForgetFollowerRequest request,
             final RequestOptions options,
             final ActionListener<BroadcastResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
                 request,
                 CcrRequestConverters::forgetFollower,
                 options,
@@ -303,15 +303,15 @@ public final class CcrClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ccr-put-auto-follow-pattern.html">
      * the docs</a> for more.
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putAutoFollowPatternAsync(PutAutoFollowPatternRequest request,
+    public Cancellable putAutoFollowPatternAsync(PutAutoFollowPatternRequest request,
                                                  RequestOptions options,
                                                  ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             request,
             CcrRequestConverters::putAutoFollowPattern,
             options,
@@ -347,15 +347,15 @@ public final class CcrClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ccr-delete-auto-follow-pattern.html">
      * the docs</a> for more.
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteAutoFollowPatternAsync(DeleteAutoFollowPatternRequest request,
+    public Cancellable deleteAutoFollowPatternAsync(DeleteAutoFollowPatternRequest request,
                                                     RequestOptions options,
                                                     ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             request,
             CcrRequestConverters::deleteAutoFollowPattern,
             options,
@@ -392,15 +392,15 @@ public final class CcrClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ccr-get-auto-follow-pattern.html">
      * the docs</a> for more.
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getAutoFollowPatternAsync(GetAutoFollowPatternRequest request,
+    public Cancellable getAutoFollowPatternAsync(GetAutoFollowPatternRequest request,
                                                  RequestOptions options,
                                                  ActionListener<GetAutoFollowPatternResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             request,
             CcrRequestConverters::getAutoFollowPattern,
             options,
@@ -437,14 +437,14 @@ public final class CcrClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ccr-get-stats.html">
      * the docs</a> for more.
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
+     * @return cancellable that may be used to cancel the request
      */
-    public void getCcrStatsAsync(CcrStatsRequest request,
+    public Cancellable getCcrStatsAsync(CcrStatsRequest request,
                                         RequestOptions options,
                                         ActionListener<CcrStatsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             request,
             CcrRequestConverters::getCcrStats,
             options,
@@ -481,14 +481,14 @@ public final class CcrClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ccr-get-follow-stats.html">
      * the docs</a> for more.
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
+     * @return cancellable that may be used to cancel the request
      */
-    public void getFollowStatsAsync(FollowStatsRequest request,
+    public Cancellable getFollowStatsAsync(FollowStatsRequest request,
                                            RequestOptions options,
                                            ActionListener<FollowStatsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             request,
             CcrRequestConverters::getFollowStats,
             options,
@@ -524,14 +524,14 @@ public final class CcrClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ccr-get-follow-info.html">
      * the docs</a> for more.
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
+     * @return cancellable that may be used to cancel the request
      */
-    public void getFollowInfoAsync(FollowInfoRequest request,
+    public Cancellable getFollowInfoAsync(FollowInfoRequest request,
                                           RequestOptions options,
                                           ActionListener<FollowInfoResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             request,
             CcrRequestConverters::getFollowInfo,
             options,

client/rest-high-level/src/main/java/org/elasticsearch/client/ClusterClient.java

@@ -67,10 +67,12 @@ public final class ClusterClient {
      * @param clusterUpdateSettingsRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putSettingsAsync(ClusterUpdateSettingsRequest clusterUpdateSettingsRequest, RequestOptions options,
+    public Cancellable putSettingsAsync(ClusterUpdateSettingsRequest clusterUpdateSettingsRequest, RequestOptions options,
                                         ActionListener<ClusterUpdateSettingsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(clusterUpdateSettingsRequest, ClusterRequestConverters::clusterPutSettings,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(clusterUpdateSettingsRequest,
+                ClusterRequestConverters::clusterPutSettings,
                 options, ClusterUpdateSettingsResponse::fromXContent, listener, emptySet());
     }
 
@@ -96,10 +98,12 @@ public final class ClusterClient {
      * @param clusterGetSettingsRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getSettingsAsync(ClusterGetSettingsRequest clusterGetSettingsRequest, RequestOptions options,
+    public Cancellable getSettingsAsync(ClusterGetSettingsRequest clusterGetSettingsRequest, RequestOptions options,
                                         ActionListener<ClusterGetSettingsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(clusterGetSettingsRequest, ClusterRequestConverters::clusterGetSettings,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
+            clusterGetSettingsRequest, ClusterRequestConverters::clusterGetSettings,
             options, ClusterGetSettingsResponse::fromXContent, listener, emptySet());
     }
 
@@ -127,9 +131,11 @@ public final class ClusterClient {
      * @param healthRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void healthAsync(ClusterHealthRequest healthRequest, RequestOptions options, ActionListener<ClusterHealthResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(healthRequest, ClusterRequestConverters::clusterHealth, options,
+    public Cancellable healthAsync(ClusterHealthRequest healthRequest, RequestOptions options,
+                                   ActionListener<ClusterHealthResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(healthRequest, ClusterRequestConverters::clusterHealth, options,
                 ClusterHealthResponse::fromXContent, listener, singleton(RestStatus.REQUEST_TIMEOUT.getStatus()));
     }
 }

client/rest-high-level/src/main/java/org/elasticsearch/client/DataFrameClient.java

@@ -21,20 +21,20 @@ package org.elasticsearch.client;
 
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.client.core.AcknowledgedResponse;
-import org.elasticsearch.client.dataframe.DeleteDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.GetDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.GetDataFrameTransformResponse;
-import org.elasticsearch.client.dataframe.GetDataFrameTransformStatsRequest;
-import org.elasticsearch.client.dataframe.GetDataFrameTransformStatsResponse;
-import org.elasticsearch.client.dataframe.PreviewDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.PreviewDataFrameTransformResponse;
-import org.elasticsearch.client.dataframe.PutDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.StartDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.StartDataFrameTransformResponse;
-import org.elasticsearch.client.dataframe.StopDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.StopDataFrameTransformResponse;
-import org.elasticsearch.client.dataframe.UpdateDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.UpdateDataFrameTransformResponse;
+import org.elasticsearch.client.transform.DeleteDataFrameTransformRequest;
+import org.elasticsearch.client.transform.GetDataFrameTransformRequest;
+import org.elasticsearch.client.transform.GetDataFrameTransformResponse;
+import org.elasticsearch.client.transform.GetDataFrameTransformStatsRequest;
+import org.elasticsearch.client.transform.GetDataFrameTransformStatsResponse;
+import org.elasticsearch.client.transform.PreviewDataFrameTransformRequest;
+import org.elasticsearch.client.transform.PreviewDataFrameTransformResponse;
+import org.elasticsearch.client.transform.PutDataFrameTransformRequest;
+import org.elasticsearch.client.transform.StartDataFrameTransformRequest;
+import org.elasticsearch.client.transform.StartDataFrameTransformResponse;
+import org.elasticsearch.client.transform.StopDataFrameTransformRequest;
+import org.elasticsearch.client.transform.StopDataFrameTransformResponse;
+import org.elasticsearch.client.transform.UpdateDataFrameTransformRequest;
+import org.elasticsearch.client.transform.UpdateDataFrameTransformResponse;
 
 import java.io.IOException;
 import java.util.Collections;
@@ -48,14 +48,14 @@ public final class DataFrameClient {
     }
 
     /**
-     * Creates a new Data Frame Transform
+     * Creates a new transform
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/put-data-frame-transform.html">
-     *     Create data frame transform documentation</a>
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/put-transform.html">
+     *     Create transform documentation</a>
      *
      * @param request The PutDataFrameTransformRequest containing the
-     * {@link org.elasticsearch.client.dataframe.transforms.DataFrameTransformConfig}.
+     * {@link org.elasticsearch.client.transform.transforms.DataFrameTransformConfig}.
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @return An AcknowledgedResponse object indicating request success
      * @throws IOException when there is a serialization issue sending the request or receiving the response
@@ -69,20 +69,20 @@ public final class DataFrameClient {
     }
 
     /**
-     * Creates a new Data Frame Transform asynchronously and notifies listener on completion
+     * Creates a new transform asynchronously and notifies listener on completion
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/put-data-frame-transform.html">
-     *     Create data frame transform documentation</a>
-     *
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/put-transform.html">
+     *     Create transform documentation</a>
      * @param request The PutDataFrameTransformRequest containing the
-     * {@link org.elasticsearch.client.dataframe.transforms.DataFrameTransformConfig}.
+     * {@link org.elasticsearch.client.transform.transforms.DataFrameTransformConfig}.
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putDataFrameTransformAsync(PutDataFrameTransformRequest request, RequestOptions options,
+    public Cancellable putDataFrameTransformAsync(PutDataFrameTransformRequest request, RequestOptions options,
                                                   ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 DataFrameRequestConverters::putDataFrameTransform,
                 options,
                 AcknowledgedResponse::fromXContent,
@@ -91,14 +91,14 @@ public final class DataFrameClient {
     }
 
     /**
-     * Updates an existing Data Frame Transform
+     * Updates an existing transform
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/update-data-frame-transform.html">
-     *     Create data frame transform documentation</a>
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/update-transform.html">
+     *     Create transform documentation</a>
      *
      * @param request The UpdateDataFrameTransformRequest containing the
-     * {@link org.elasticsearch.client.dataframe.transforms.DataFrameTransformConfigUpdate}.
+     * {@link org.elasticsearch.client.transform.transforms.DataFrameTransformConfigUpdate}.
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @return An UpdateDataFrameTransformResponse object containing the updated configuration
      * @throws IOException when there is a serialization issue sending the request or receiving the response
@@ -113,21 +113,21 @@ public final class DataFrameClient {
     }
 
     /**
-     * Updates an existing Data Frame Transform asynchronously and notifies listener on completion
+     * Updates an existing transform asynchronously and notifies listener on completion
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/update-data-frame-transform.html">
-     *     Create data frame transform documentation</a>
-     *
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/update-transform.html">
+     *     Create transform documentation</a>
      * @param request The UpdateDataFrameTransformRequest containing the
-     * {@link org.elasticsearch.client.dataframe.transforms.DataFrameTransformConfigUpdate}.
+     * {@link org.elasticsearch.client.transform.transforms.DataFrameTransformConfigUpdate}.
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void updateDataFrameTransformAsync(UpdateDataFrameTransformRequest request,
+    public Cancellable updateDataFrameTransformAsync(UpdateDataFrameTransformRequest request,
                                                      RequestOptions options,
                                                      ActionListener<UpdateDataFrameTransformResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             DataFrameRequestConverters::updateDataFrameTransform,
             options,
             UpdateDataFrameTransformResponse::fromXContent,
@@ -136,15 +136,15 @@ public final class DataFrameClient {
     }
 
     /**
-     * Get the running statistics of a Data Frame Transform
+     * Get the running statistics of a transform
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/get-data-frame-transform-stats.html">
-     *     Get data frame transform stats documentation</a>
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/get-transform-stats.html">
+     *     Get transform stats documentation</a>
      *
      * @param request Specifies the which transforms to get the stats for
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
-     * @return The Data Frame Transform stats
+     * @return The transform stats
      * @throws IOException when there is a serialization issue sending the request or receiving the response
      */
     public GetDataFrameTransformStatsResponse getDataFrameTransformStats(GetDataFrameTransformStatsRequest request, RequestOptions options)
@@ -157,19 +157,19 @@ public final class DataFrameClient {
     }
 
     /**
-     * Get the running statistics of a Data Frame Transform asynchronously and notifies listener on completion
+     * Get the running statistics of a transform asynchronously and notifies listener on completion
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/get-data-frame-transform-stats.html">
-     *     Get data frame transform stats documentation</a>
-     *
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/get-transform-stats.html">
+     *     Get transform stats documentation</a>
      * @param request Specifies the which transforms to get the stats for
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getDataFrameTransformStatsAsync(GetDataFrameTransformStatsRequest request, RequestOptions options,
+    public Cancellable getDataFrameTransformStatsAsync(GetDataFrameTransformStatsRequest request, RequestOptions options,
                                                        ActionListener<GetDataFrameTransformStatsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 DataFrameRequestConverters::getDataFrameTransformStats,
                 options,
                 GetDataFrameTransformStatsResponse::fromXContent,
@@ -178,13 +178,13 @@ public final class DataFrameClient {
     }
 
     /**
-     * Delete a data frame transform
+     * Delete a transform
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/delete-data-frame-transform.html">
-     *     Delete data frame transform documentation</a>
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/delete-transform.html">
+     *     Delete transform documentation</a>
      *
-     * @param request The delete data frame transform request
+     * @param request The delete transform request
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @return An AcknowledgedResponse object indicating request success
      * @throws IOException when there is a serialization issue sending the request or receiving the response
@@ -199,19 +199,19 @@ public final class DataFrameClient {
     }
 
     /**
-     * Delete a data frame transform asynchronously and notifies listener on completion
+     * Delete a transform asynchronously and notifies listener on completion
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/delete-data-frame-transform.html">
-     *     Delete data frame transform documentation</a>
-     *
-     * @param request The delete data frame transform request
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/delete-transform.html">
+     *     Delete transform documentation</a>
+     * @param request The delete transform request
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteDataFrameTransformAsync(DeleteDataFrameTransformRequest request, RequestOptions options,
+    public Cancellable deleteDataFrameTransformAsync(DeleteDataFrameTransformRequest request, RequestOptions options,
                                                      ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 DataFrameRequestConverters::deleteDataFrameTransform,
                 options,
                 AcknowledgedResponse::fromXContent,
@@ -220,13 +220,13 @@ public final class DataFrameClient {
     }
 
     /**
-     * Preview the result of a data frame transform
+     * Preview the result of a transform
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/preview-data-frame-transform.html">
-     *     Preview data frame transform documentation</a>
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/preview-transform.html">
+     *     Preview transform documentation</a>
      *
-     * @param request The preview data frame transform request
+     * @param request The preview transform request
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @return A response containing the results of the applied transform
      * @throws IOException when there is a serialization issue sending the request or receiving the response
@@ -241,18 +241,18 @@ public final class DataFrameClient {
     }
 
     /**
-     * Preview the result of a data frame transform asynchronously and notifies listener on completion
+     * Preview the result of a transform asynchronously and notifies listener on completion
      * <p>
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/preview-data-frame-transform.html">
-     *     Preview data frame transform documentation</a>
-     *
-     * @param request The preview data frame transform request
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/preview-transform.html">
+     *     Preview transform documentation</a>
+     * @param request The preview transform request
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void previewDataFrameTransformAsync(PreviewDataFrameTransformRequest request, RequestOptions options,
+    public Cancellable previewDataFrameTransformAsync(PreviewDataFrameTransformRequest request, RequestOptions options,
                                                       ActionListener<PreviewDataFrameTransformResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 DataFrameRequestConverters::previewDataFrameTransform,
                 options,
                 PreviewDataFrameTransformResponse::fromXContent,
@@ -261,13 +261,13 @@ public final class DataFrameClient {
     }
 
     /**
-     * Start a data frame transform
+     * Start a transform
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/start-data-frame-transform.html">
-     *     Start data frame transform documentation</a>
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/start-transform.html">
+     *     Start transform documentation</a>
      *
-     * @param request The start data frame transform request
+     * @param request The start transform request
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @return A response object indicating request success
      * @throws IOException when there is a serialization issue sending the request or receiving the response
@@ -282,19 +282,19 @@ public final class DataFrameClient {
     }
 
     /**
-     * Start a data frame transform asynchronously and notifies listener on completion
+     * Start a transform asynchronously and notifies listener on completion
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/start-data-frame-transform.html">
-     *     Start data frame transform documentation</a>
-     *
-     * @param request The start data frame transform request
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/start-transform.html">
+     *     Start transform documentation</a>
+     * @param request The start transform request
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void startDataFrameTransformAsync(StartDataFrameTransformRequest request, RequestOptions options,
+    public Cancellable startDataFrameTransformAsync(StartDataFrameTransformRequest request, RequestOptions options,
                                                     ActionListener<StartDataFrameTransformResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 DataFrameRequestConverters::startDataFrameTransform,
                 options,
                 StartDataFrameTransformResponse::fromXContent,
@@ -303,13 +303,13 @@ public final class DataFrameClient {
     }
 
     /**
-     * Stop a data frame transform
+     * Stop a transform
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/stop-data-frame-transform.html">
-     *     Stop data frame transform documentation</a>
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/stop-transform.html">
+     *     Stop transform documentation</a>
      *
-     * @param request The stop data frame transform request
+     * @param request The stop transform request
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @return A response object indicating request success
      * @throws IOException when there is a serialization issue sending the request or receiving the response
@@ -324,19 +324,19 @@ public final class DataFrameClient {
     }
 
     /**
-     * Stop a data frame transform asynchronously and notifies listener on completion
+     * Stop a transform asynchronously and notifies listener on completion
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/stop-data-frame-transform.html">
-     *     Stop data frame transform documentation</a>
-     *
-     * @param request The stop data frame transform request
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/stop-transform.html">
+     *     Stop transform documentation</a>
+     * @param request The stop transform request
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void stopDataFrameTransformAsync(StopDataFrameTransformRequest request, RequestOptions options,
+    public Cancellable stopDataFrameTransformAsync(StopDataFrameTransformRequest request, RequestOptions options,
                                                    ActionListener<StopDataFrameTransformResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 DataFrameRequestConverters::stopDataFrameTransform,
                 options,
                 StopDataFrameTransformResponse::fromXContent,
@@ -345,13 +345,13 @@ public final class DataFrameClient {
     }
 
     /**
-     * Get one or more data frame transform configurations
+     * Get one or more transform configurations
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/get-data-frame-transform.html">
-     *     Get data frame transform documentation</a>
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/get-transform.html">
+     *     Get transform documentation</a>
      *
-     * @param request The get data frame transform request
+     * @param request The get transform request
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @return An GetDataFrameTransformResponse containing the requested transforms
      * @throws IOException when there is a serialization issue sending the request or receiving the response
@@ -366,19 +366,19 @@ public final class DataFrameClient {
     }
 
     /**
-     * Get one or more data frame transform configurations asynchronously and notifies listener on completion
+     * Get one or more transform configurations asynchronously and notifies listener on completion
      * <p>
      * For additional info
-     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/get-data-frame-transform.html">
-     *     Get data frame transform documentation</a>
-     *
-     * @param request The get data frame transform request
+     * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/get-transform.html">
+     *     Get data transform documentation</a>
+     * @param request The get transform request
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getDataFrameTransformAsync(GetDataFrameTransformRequest request, RequestOptions options,
+    public Cancellable getDataFrameTransformAsync(GetDataFrameTransformRequest request, RequestOptions options,
                                                   ActionListener<GetDataFrameTransformResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 DataFrameRequestConverters::getDataFrameTransform,
                 options,
                 GetDataFrameTransformResponse::fromXContent,

client/rest-high-level/src/main/java/org/elasticsearch/client/DataFrameRequestConverters.java

@@ -24,23 +24,23 @@ import org.apache.http.client.methods.HttpGet;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.client.methods.HttpPut;
 import org.elasticsearch.client.core.PageParams;
-import org.elasticsearch.client.dataframe.DeleteDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.GetDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.GetDataFrameTransformStatsRequest;
-import org.elasticsearch.client.dataframe.PreviewDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.PutDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.StartDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.StopDataFrameTransformRequest;
-import org.elasticsearch.client.dataframe.UpdateDataFrameTransformRequest;
+import org.elasticsearch.client.transform.DeleteDataFrameTransformRequest;
+import org.elasticsearch.client.transform.GetDataFrameTransformRequest;
+import org.elasticsearch.client.transform.GetDataFrameTransformStatsRequest;
+import org.elasticsearch.client.transform.PreviewDataFrameTransformRequest;
+import org.elasticsearch.client.transform.PutDataFrameTransformRequest;
+import org.elasticsearch.client.transform.StartDataFrameTransformRequest;
+import org.elasticsearch.client.transform.StopDataFrameTransformRequest;
+import org.elasticsearch.client.transform.UpdateDataFrameTransformRequest;
 import org.elasticsearch.common.Strings;
 
 import java.io.IOException;
 
 import static org.elasticsearch.client.RequestConverters.REQUEST_BODY_CONTENT_TYPE;
 import static org.elasticsearch.client.RequestConverters.createEntity;
-import static org.elasticsearch.client.dataframe.DeleteDataFrameTransformRequest.FORCE;
-import static org.elasticsearch.client.dataframe.GetDataFrameTransformRequest.ALLOW_NO_MATCH;
-import static org.elasticsearch.client.dataframe.PutDataFrameTransformRequest.DEFER_VALIDATION;
+import static org.elasticsearch.client.transform.DeleteDataFrameTransformRequest.FORCE;
+import static org.elasticsearch.client.transform.GetDataFrameTransformRequest.ALLOW_NO_MATCH;
+import static org.elasticsearch.client.transform.PutDataFrameTransformRequest.DEFER_VALIDATION;
 
 final class DataFrameRequestConverters {
 

client/rest-high-level/src/main/java/org/elasticsearch/client/GraphClient.java

@@ -52,11 +52,12 @@ public class GraphClient {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/graph-explore-api.html">Graph API
      * on elastic.co</a>.
+     * @return cancellable that may be used to cancel the request
      */
-    public final void exploreAsync(GraphExploreRequest graphExploreRequest,
+    public final Cancellable exploreAsync(GraphExploreRequest graphExploreRequest,
                                           RequestOptions options,
                                           ActionListener<GraphExploreResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(graphExploreRequest, GraphRequestConverters::explore,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(graphExploreRequest, GraphRequestConverters::explore,
             options, GraphExploreResponse::fromXContent, listener, emptySet());
     }
 

client/rest-high-level/src/main/java/org/elasticsearch/client/IndexLifecycleClient.java

@@ -39,6 +39,8 @@ import org.elasticsearch.client.slm.ExecuteSnapshotLifecyclePolicyRequest;
 import org.elasticsearch.client.slm.ExecuteSnapshotLifecyclePolicyResponse;
 import org.elasticsearch.client.slm.GetSnapshotLifecyclePolicyRequest;
 import org.elasticsearch.client.slm.GetSnapshotLifecyclePolicyResponse;
+import org.elasticsearch.client.slm.GetSnapshotLifecycleStatsRequest;
+import org.elasticsearch.client.slm.GetSnapshotLifecycleStatsResponse;
 import org.elasticsearch.client.slm.PutSnapshotLifecyclePolicyRequest;
 
 import java.io.IOException;
@@ -74,10 +76,11 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getLifecyclePolicyAsync(GetLifecyclePolicyRequest request, RequestOptions options,
+    public Cancellable getLifecyclePolicyAsync(GetLifecyclePolicyRequest request, RequestOptions options,
                                                ActionListener<GetLifecyclePolicyResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::getLifecyclePolicy, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::getLifecyclePolicy, options,
             GetLifecyclePolicyResponse::fromXContent, listener, emptySet());
     }
 
@@ -103,10 +106,11 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putLifecyclePolicyAsync(PutLifecyclePolicyRequest request, RequestOptions options,
+    public Cancellable putLifecyclePolicyAsync(PutLifecyclePolicyRequest request, RequestOptions options,
                                                ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::putLifecyclePolicy, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::putLifecyclePolicy, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -132,10 +136,12 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteLifecyclePolicyAsync(DeleteLifecyclePolicyRequest request, RequestOptions options,
+    public Cancellable deleteLifecyclePolicyAsync(DeleteLifecyclePolicyRequest request, RequestOptions options,
                                                   ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::deleteLifecyclePolicy, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
+            request, IndexLifecycleRequestConverters::deleteLifecyclePolicy, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -161,10 +167,12 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void removeIndexLifecyclePolicyAsync(RemoveIndexLifecyclePolicyRequest request, RequestOptions options,
+    public Cancellable removeIndexLifecyclePolicyAsync(RemoveIndexLifecyclePolicyRequest request, RequestOptions options,
                                                        ActionListener<RemoveIndexLifecyclePolicyResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::removeIndexLifecyclePolicy, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
+            request, IndexLifecycleRequestConverters::removeIndexLifecyclePolicy, options,
                 RemoveIndexLifecyclePolicyResponse::fromXContent, listener, emptySet());
     }
 
@@ -189,9 +197,10 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void startILMAsync(StartILMRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::startILM, options,
+    public Cancellable startILMAsync(StartILMRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::startILM, options,
                 AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -227,14 +236,15 @@ public class IndexLifecycleClient {
      * Asynchronously get the status of index lifecycle management
      * See <a href="https://fix-me-when-we-have-docs.com">
      * the docs</a> for more.
-     *
      * @param request  the request
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void lifecycleManagementStatusAsync(LifecycleManagementStatusRequest request, RequestOptions options,
+    public Cancellable lifecycleManagementStatusAsync(LifecycleManagementStatusRequest request, RequestOptions options,
                                                       ActionListener<LifecycleManagementStatusResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::lifecycleManagementStatus, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
+            request, IndexLifecycleRequestConverters::lifecycleManagementStatus, options,
             LifecycleManagementStatusResponse::fromXContent, listener, emptySet());
     }
 
@@ -245,9 +255,10 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void stopILMAsync(StopILMRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::stopILM, options,
+    public Cancellable stopILMAsync(StopILMRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::stopILM, options,
                 AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -272,10 +283,11 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void explainLifecycleAsync(ExplainLifecycleRequest request, RequestOptions options,
+    public Cancellable explainLifecycleAsync(ExplainLifecycleRequest request, RequestOptions options,
                                              ActionListener<ExplainLifecycleResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::explainLifecycle, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::explainLifecycle, options,
                 ExplainLifecycleResponse::fromXContent, listener, emptySet());
     }
 
@@ -300,10 +312,11 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void retryLifecyclePolicyAsync(RetryLifecyclePolicyRequest request, RequestOptions options,
+    public Cancellable retryLifecyclePolicyAsync(RetryLifecyclePolicyRequest request, RequestOptions options,
                                                  ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::retryLifecycle, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::retryLifecycle, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -335,10 +348,11 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getSnapshotLifecyclePolicyAsync(GetSnapshotLifecyclePolicyRequest request, RequestOptions options,
+    public Cancellable getSnapshotLifecyclePolicyAsync(GetSnapshotLifecyclePolicyRequest request, RequestOptions options,
                                                        ActionListener<GetSnapshotLifecyclePolicyResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::getSnapshotLifecyclePolicy,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::getSnapshotLifecyclePolicy,
             options, GetSnapshotLifecyclePolicyResponse::fromXContent, listener, emptySet());
     }
 
@@ -370,10 +384,11 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putSnapshotLifecyclePolicyAsync(PutSnapshotLifecyclePolicyRequest request, RequestOptions options,
+    public Cancellable putSnapshotLifecyclePolicyAsync(PutSnapshotLifecyclePolicyRequest request, RequestOptions options,
                                                        ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::putSnapshotLifecyclePolicy,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::putSnapshotLifecyclePolicy,
             options, AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -405,10 +420,12 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteSnapshotLifecyclePolicyAsync(DeleteSnapshotLifecyclePolicyRequest request, RequestOptions options,
-                                                   ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::deleteSnapshotLifecyclePolicy,
+    public Cancellable deleteSnapshotLifecyclePolicyAsync(DeleteSnapshotLifecyclePolicyRequest request,
+                                          RequestOptions options,ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
+            request, IndexLifecycleRequestConverters::deleteSnapshotLifecyclePolicy,
             options, AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -440,10 +457,48 @@ public class IndexLifecycleClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void executeSnapshotLifecyclePolicyAsync(ExecuteSnapshotLifecyclePolicyRequest request, RequestOptions options,
+    public Cancellable executeSnapshotLifecyclePolicyAsync(
+        ExecuteSnapshotLifecyclePolicyRequest request, RequestOptions options,
         ActionListener<ExecuteSnapshotLifecyclePolicyResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::executeSnapshotLifecyclePolicy,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
+            request, IndexLifecycleRequestConverters::executeSnapshotLifecyclePolicy,
             options, ExecuteSnapshotLifecyclePolicyResponse::fromXContent, listener, emptySet());
     }
+
+    /**
+     * Retrieve snapshot lifecycle statistics.
+     * See <pre>
+     *  https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/
+     *  java-rest-high-ilm-slm-get-snapshot-lifecycle-stats.html
+     * </pre>
+     * for more.
+     * @param request the request
+     * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
+     * @return the response
+     * @throws IOException in case there is a problem sending the request or parsing back the response
+     */
+    public GetSnapshotLifecycleStatsResponse getSnapshotLifecycleStats(GetSnapshotLifecycleStatsRequest request,
+                                                                       RequestOptions options) throws IOException {
+        return restHighLevelClient.performRequestAndParseEntity(request, IndexLifecycleRequestConverters::getSnapshotLifecycleStats,
+            options, GetSnapshotLifecycleStatsResponse::fromXContent, emptySet());
+    }
+
+    /**
+     * Asynchronously retrieve snapshot lifecycle statistics.
+     * See <pre>
+     *  https://www.elastic.co/guide/en/elasticsearch/client/java-rest/current/
+     *  java-rest-high-ilm-slm-get-snapshot-lifecycle-stats.html
+     * </pre>
+     * for more.
+     * @param request the request
+     * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
+     * @param listener the listener to be notified upon request completion
+     */
+    public Cancellable getSnapshotLifecycleStatsAsync(GetSnapshotLifecycleStatsRequest request, RequestOptions options,
+                                               ActionListener<GetSnapshotLifecycleStatsResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndexLifecycleRequestConverters::getSnapshotLifecycleStats,
+            options, GetSnapshotLifecycleStatsResponse::fromXContent, listener, emptySet());
+    }
 }

client/rest-high-level/src/main/java/org/elasticsearch/client/IndexLifecycleRequestConverters.java

@@ -35,6 +35,7 @@ import org.elasticsearch.client.indexlifecycle.StopILMRequest;
 import org.elasticsearch.client.slm.DeleteSnapshotLifecyclePolicyRequest;
 import org.elasticsearch.client.slm.ExecuteSnapshotLifecyclePolicyRequest;
 import org.elasticsearch.client.slm.GetSnapshotLifecyclePolicyRequest;
+import org.elasticsearch.client.slm.GetSnapshotLifecycleStatsRequest;
 import org.elasticsearch.client.slm.PutSnapshotLifecyclePolicyRequest;
 import org.elasticsearch.common.Strings;
 
@@ -215,4 +216,14 @@ final class IndexLifecycleRequestConverters {
         request.addParameters(params.asMap());
         return request;
     }
+
+    static Request getSnapshotLifecycleStats(GetSnapshotLifecycleStatsRequest getSnapshotLifecycleStatsRequest) {
+        String endpoint = new RequestConverters.EndpointBuilder().addPathPartAsIs("_slm/stats").build();
+        Request request = new Request(HttpGet.METHOD_NAME, endpoint);
+        RequestConverters.Params params = new RequestConverters.Params();
+        params.withMasterTimeout(getSnapshotLifecycleStatsRequest.masterNodeTimeout());
+        params.withTimeout(getSnapshotLifecycleStatsRequest.timeout());
+        request.addParameters(params.asMap());
+        return request;
+    }
 }

client/rest-high-level/src/main/java/org/elasticsearch/client/IndicesClient.java

@@ -108,9 +108,12 @@ public final class IndicesClient {
      * @param deleteIndexRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteAsync(DeleteIndexRequest deleteIndexRequest, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(deleteIndexRequest, IndicesRequestConverters::deleteIndex, options,
+    public Cancellable deleteAsync(DeleteIndexRequest deleteIndexRequest, RequestOptions options,
+                                   ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(deleteIndexRequest,
+            IndicesRequestConverters::deleteIndex, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -136,11 +139,12 @@ public final class IndicesClient {
      * @param createIndexRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void createAsync(CreateIndexRequest createIndexRequest,
+    public Cancellable createAsync(CreateIndexRequest createIndexRequest,
                                    RequestOptions options,
                                    ActionListener<CreateIndexResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(createIndexRequest, IndicesRequestConverters::createIndex, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(createIndexRequest, IndicesRequestConverters::createIndex, options,
             CreateIndexResponse::fromXContent, listener, emptySet());
     }
 
@@ -177,12 +181,13 @@ public final class IndicesClient {
      * @deprecated This method uses an old request object which still refers to types, a deprecated feature. The
      * method {@link #createAsync(CreateIndexRequest, RequestOptions, ActionListener)} should be used instead,
      * which accepts a new request object.
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void createAsync(org.elasticsearch.action.admin.indices.create.CreateIndexRequest createIndexRequest,
+    public Cancellable createAsync(org.elasticsearch.action.admin.indices.create.CreateIndexRequest createIndexRequest,
                                    RequestOptions options,
                                    ActionListener<org.elasticsearch.action.admin.indices.create.CreateIndexResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(createIndexRequest,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(createIndexRequest,
             IndicesRequestConverters::createIndex, options,
             org.elasticsearch.action.admin.indices.create.CreateIndexResponse::fromXContent, listener, emptySet());
     }
@@ -208,10 +213,11 @@ public final class IndicesClient {
      * @param putMappingRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putMappingAsync(PutMappingRequest putMappingRequest, RequestOptions options,
+    public Cancellable putMappingAsync(PutMappingRequest putMappingRequest, RequestOptions options,
                                        ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(putMappingRequest, IndicesRequestConverters::putMapping, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(putMappingRequest, IndicesRequestConverters::putMapping, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -245,12 +251,13 @@ public final class IndicesClient {
      * @deprecated This method uses an old request object which still refers to types, a deprecated feature. The
      * method {@link #putMappingAsync(PutMappingRequest, RequestOptions, ActionListener)} should be used instead,
      * which accepts a new request object.
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void putMappingAsync(org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest putMappingRequest,
+    public Cancellable putMappingAsync(org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest putMappingRequest,
                                        RequestOptions options,
                                        ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(putMappingRequest, IndicesRequestConverters::putMapping, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(putMappingRequest, IndicesRequestConverters::putMapping, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -278,10 +285,11 @@ public final class IndicesClient {
      * @param getMappingsRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getMappingAsync(GetMappingsRequest getMappingsRequest, RequestOptions options,
+    public Cancellable getMappingAsync(GetMappingsRequest getMappingsRequest, RequestOptions options,
                                        ActionListener<GetMappingsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getMappingsRequest,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(getMappingsRequest,
             IndicesRequestConverters::getMappings,
             options,
             GetMappingsResponse::fromXContent,
@@ -324,12 +332,13 @@ public final class IndicesClient {
      * @deprecated This method uses old request and response objects which still refer to types, a deprecated feature.
      * The method {@link #getMapping(GetMappingsRequest, RequestOptions)} should be used instead, which accepts a new
      * request object.
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void getMappingAsync(org.elasticsearch.action.admin.indices.mapping.get.GetMappingsRequest getMappingsRequest,
+    public Cancellable getMappingAsync(org.elasticsearch.action.admin.indices.mapping.get.GetMappingsRequest getMappingsRequest,
                                        RequestOptions options,
                                        ActionListener<org.elasticsearch.action.admin.indices.mapping.get.GetMappingsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getMappingsRequest,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(getMappingsRequest,
             IndicesRequestConverters::getMappings,
             options,
             org.elasticsearch.action.admin.indices.mapping.get.GetMappingsResponse::fromXContent,
@@ -369,13 +378,17 @@ public final class IndicesClient {
      * @deprecated This method uses old request and response objects which still refer to types, a deprecated feature.
      * The method {@link #getFieldMappingAsync(GetFieldMappingsRequest, RequestOptions, ActionListener)} should be
      * used instead, which accepts a new request object.
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void getFieldMappingAsync(org.elasticsearch.action.admin.indices.mapping.get.GetFieldMappingsRequest getFieldMappingsRequest,
+    public Cancellable getFieldMappingAsync(
+        org.elasticsearch.action.admin.indices.mapping.get.GetFieldMappingsRequest getFieldMappingsRequest,
         RequestOptions options,
         ActionListener<org.elasticsearch.action.admin.indices.mapping.get.GetFieldMappingsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getFieldMappingsRequest, IndicesRequestConverters::getFieldMapping, options,
-            org.elasticsearch.action.admin.indices.mapping.get.GetFieldMappingsResponse::fromXContent, listener, emptySet());
+        return restHighLevelClient.performRequestAsyncAndParseEntity(getFieldMappingsRequest,
+            IndicesRequestConverters::getFieldMapping, options,
+            org.elasticsearch.action.admin.indices.mapping.get.GetFieldMappingsResponse::fromXContent,
+            listener, emptySet());
     }
 
     /**
@@ -401,10 +414,12 @@ public final class IndicesClient {
      * @param getFieldMappingsRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getFieldMappingAsync(GetFieldMappingsRequest getFieldMappingsRequest,
+    public Cancellable getFieldMappingAsync(GetFieldMappingsRequest getFieldMappingsRequest,
                                             RequestOptions options, ActionListener<GetFieldMappingsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getFieldMappingsRequest, IndicesRequestConverters::getFieldMapping, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
+            getFieldMappingsRequest, IndicesRequestConverters::getFieldMapping, options,
             GetFieldMappingsResponse::fromXContent, listener, emptySet());
     }
 
@@ -429,10 +444,12 @@ public final class IndicesClient {
      * @param indicesAliasesRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void updateAliasesAsync(IndicesAliasesRequest indicesAliasesRequest, RequestOptions options,
+    public Cancellable updateAliasesAsync(IndicesAliasesRequest indicesAliasesRequest, RequestOptions options,
                                           ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(indicesAliasesRequest, IndicesRequestConverters::updateAliases, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(indicesAliasesRequest,
+            IndicesRequestConverters::updateAliases, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -457,9 +474,10 @@ public final class IndicesClient {
      * @param openIndexRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void openAsync(OpenIndexRequest openIndexRequest, RequestOptions options, ActionListener<OpenIndexResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(openIndexRequest, IndicesRequestConverters::openIndex, options,
+    public Cancellable openAsync(OpenIndexRequest openIndexRequest, RequestOptions options, ActionListener<OpenIndexResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(openIndexRequest, IndicesRequestConverters::openIndex, options,
                 OpenIndexResponse::fromXContent, listener, emptySet());
     }
 
@@ -484,9 +502,12 @@ public final class IndicesClient {
      * @param closeIndexRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void closeAsync(CloseIndexRequest closeIndexRequest, RequestOptions options, ActionListener<CloseIndexResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(closeIndexRequest, IndicesRequestConverters::closeIndex, options,
+    public Cancellable closeAsync(CloseIndexRequest closeIndexRequest, RequestOptions options,
+                                  ActionListener<CloseIndexResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(closeIndexRequest,
+            IndicesRequestConverters::closeIndex, options,
             CloseIndexResponse::fromXContent, listener, emptySet());
     }
 
@@ -512,9 +533,10 @@ public final class IndicesClient {
      * @param getAliasesRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void existsAliasAsync(GetAliasesRequest getAliasesRequest, RequestOptions options, ActionListener<Boolean> listener) {
-        restHighLevelClient.performRequestAsync(getAliasesRequest, IndicesRequestConverters::existsAlias, options,
+    public Cancellable existsAliasAsync(GetAliasesRequest getAliasesRequest, RequestOptions options, ActionListener<Boolean> listener) {
+        return restHighLevelClient.performRequestAsync(getAliasesRequest, IndicesRequestConverters::existsAlias, options,
                 RestHighLevelClient::convertExistsResponse, listener, emptySet());
     }
 
@@ -537,9 +559,10 @@ public final class IndicesClient {
      * @param refreshRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void refreshAsync(RefreshRequest refreshRequest, RequestOptions options, ActionListener<RefreshResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(refreshRequest, IndicesRequestConverters::refresh, options,
+    public Cancellable refreshAsync(RefreshRequest refreshRequest, RequestOptions options, ActionListener<RefreshResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(refreshRequest, IndicesRequestConverters::refresh, options,
                 RefreshResponse::fromXContent, listener, emptySet());
     }
 
@@ -562,15 +585,16 @@ public final class IndicesClient {
      * @param flushRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void flushAsync(FlushRequest flushRequest, RequestOptions options, ActionListener<FlushResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(flushRequest, IndicesRequestConverters::flush, options,
+    public Cancellable flushAsync(FlushRequest flushRequest, RequestOptions options, ActionListener<FlushResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(flushRequest, IndicesRequestConverters::flush, options,
                 FlushResponse::fromXContent, listener, emptySet());
     }
 
     /**
      * Initiate a synced flush manually using the synced flush API.
-     * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-flush.html#synced-flush-api">
+     * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-synced-flush-api.html">
      *     Synced flush API on elastic.co</a>
      * @param syncedFlushRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
@@ -584,15 +608,16 @@ public final class IndicesClient {
 
     /**
      * Asynchronously initiate a synced flush manually using the synced flush API.
-     * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-flush.html#synced-flush-api">
+     * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-synced-flush-api.html">
      *     Synced flush API on elastic.co</a>
      * @param syncedFlushRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void flushSyncedAsync(SyncedFlushRequest syncedFlushRequest, RequestOptions options,
+    public Cancellable flushSyncedAsync(SyncedFlushRequest syncedFlushRequest, RequestOptions options,
                                         ActionListener<SyncedFlushResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(syncedFlushRequest, IndicesRequestConverters::flushSynced, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(syncedFlushRequest, IndicesRequestConverters::flushSynced, options,
                 SyncedFlushResponse::fromXContent, listener, emptySet());
     }
 
@@ -617,10 +642,11 @@ public final class IndicesClient {
      * @param getSettingsRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getSettingsAsync(GetSettingsRequest getSettingsRequest, RequestOptions options,
+    public Cancellable getSettingsAsync(GetSettingsRequest getSettingsRequest, RequestOptions options,
                                         ActionListener<GetSettingsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getSettingsRequest, IndicesRequestConverters::getSettings, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(getSettingsRequest, IndicesRequestConverters::getSettings, options,
             GetSettingsResponse::fromXContent, listener, emptySet());
     }
 
@@ -645,10 +671,11 @@ public final class IndicesClient {
      * @param getIndexRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getAsync(GetIndexRequest getIndexRequest, RequestOptions options,
+    public Cancellable getAsync(GetIndexRequest getIndexRequest, RequestOptions options,
                                 ActionListener<GetIndexResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getIndexRequest, IndicesRequestConverters::getIndex, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(getIndexRequest, IndicesRequestConverters::getIndex, options,
             GetIndexResponse::fromXContent, listener, emptySet());
     }
 
@@ -679,11 +706,12 @@ public final class IndicesClient {
      * @param listener the listener to be notified upon request completion
      * @deprecated This method uses an old request object which still refers to types, a deprecated feature. The method
      * {@link #getAsync(GetIndexRequest, RequestOptions, ActionListener)} should be used instead, which accepts a new request object.
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void getAsync(org.elasticsearch.action.admin.indices.get.GetIndexRequest getIndexRequest, RequestOptions options,
+    public Cancellable getAsync(org.elasticsearch.action.admin.indices.get.GetIndexRequest getIndexRequest, RequestOptions options,
                                 ActionListener<org.elasticsearch.action.admin.indices.get.GetIndexResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getIndexRequest, IndicesRequestConverters::getIndex, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(getIndexRequest, IndicesRequestConverters::getIndex, options,
                 org.elasticsearch.action.admin.indices.get.GetIndexResponse::fromXContent, listener, emptySet());
     }
 
@@ -724,10 +752,12 @@ public final class IndicesClient {
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
      * @deprecated use {@link #forcemergeAsync(ForceMergeRequest, RequestOptions, ActionListener)} instead
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void forceMergeAsync(ForceMergeRequest forceMergeRequest, RequestOptions options, ActionListener<ForceMergeResponse> listener) {
-        forcemergeAsync(forceMergeRequest, options, listener);
+    public Cancellable forceMergeAsync(ForceMergeRequest forceMergeRequest, RequestOptions options,
+                                       ActionListener<ForceMergeResponse> listener) {
+        return forcemergeAsync(forceMergeRequest, options, listener);
     }
 
     /**
@@ -737,9 +767,12 @@ public final class IndicesClient {
      * @param forceMergeRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void forcemergeAsync(ForceMergeRequest forceMergeRequest, RequestOptions options, ActionListener<ForceMergeResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(forceMergeRequest, IndicesRequestConverters::forceMerge, options,
+    public Cancellable forcemergeAsync(ForceMergeRequest forceMergeRequest, RequestOptions options,
+                                       ActionListener<ForceMergeResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(forceMergeRequest,
+                IndicesRequestConverters::forceMerge, options,
                 ForceMergeResponse::fromXContent, listener, emptySet());
     }
 
@@ -765,10 +798,12 @@ public final class IndicesClient {
      * @param clearIndicesCacheRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void clearCacheAsync(ClearIndicesCacheRequest clearIndicesCacheRequest, RequestOptions options,
+    public Cancellable clearCacheAsync(ClearIndicesCacheRequest clearIndicesCacheRequest, RequestOptions options,
                                        ActionListener<ClearIndicesCacheResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(clearIndicesCacheRequest, IndicesRequestConverters::clearCache, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(clearIndicesCacheRequest,
+                IndicesRequestConverters::clearCache, options,
                 ClearIndicesCacheResponse::fromXContent, listener, emptySet());
     }
 
@@ -798,9 +833,10 @@ public final class IndicesClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void existsAsync(GetIndexRequest request, RequestOptions options, ActionListener<Boolean> listener) {
-        restHighLevelClient.performRequestAsync(
+    public Cancellable existsAsync(GetIndexRequest request, RequestOptions options, ActionListener<Boolean> listener) {
+        return restHighLevelClient.performRequestAsync(
                 request,
                 IndicesRequestConverters::indicesExist,
                 options,
@@ -841,11 +877,12 @@ public final class IndicesClient {
      * @param listener the listener to be notified upon request completion
      * @deprecated This method uses an old request object which still refers to types, a deprecated feature. The method
      * {@link #existsAsync(GetIndexRequest, RequestOptions, ActionListener)} should be used instead, which accepts a new request object.
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void existsAsync(org.elasticsearch.action.admin.indices.get.GetIndexRequest request, RequestOptions options,
+    public Cancellable existsAsync(org.elasticsearch.action.admin.indices.get.GetIndexRequest request, RequestOptions options,
                                    ActionListener<Boolean> listener) {
-        restHighLevelClient.performRequestAsync(
+        return restHighLevelClient.performRequestAsync(
                 request,
                 IndicesRequestConverters::indicesExist,
                 options,
@@ -876,9 +913,10 @@ public final class IndicesClient {
      * @param resizeRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void shrinkAsync(ResizeRequest resizeRequest, RequestOptions options, ActionListener<ResizeResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(resizeRequest, IndicesRequestConverters::shrink, options,
+    public Cancellable shrinkAsync(ResizeRequest resizeRequest, RequestOptions options, ActionListener<ResizeResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(resizeRequest, IndicesRequestConverters::shrink, options,
                 ResizeResponse::fromXContent, listener, emptySet());
     }
 
@@ -903,9 +941,10 @@ public final class IndicesClient {
      * @param resizeRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void splitAsync(ResizeRequest resizeRequest, RequestOptions options, ActionListener<ResizeResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(resizeRequest, IndicesRequestConverters::split, options,
+    public Cancellable splitAsync(ResizeRequest resizeRequest, RequestOptions options, ActionListener<ResizeResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(resizeRequest, IndicesRequestConverters::split, options,
                 ResizeResponse::fromXContent, listener, emptySet());
     }
 
@@ -930,9 +969,10 @@ public final class IndicesClient {
      * @param resizeRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void cloneAsync(ResizeRequest resizeRequest, RequestOptions options, ActionListener<ResizeResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(resizeRequest, IndicesRequestConverters::clone, options,
+    public Cancellable cloneAsync(ResizeRequest resizeRequest, RequestOptions options, ActionListener<ResizeResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(resizeRequest, IndicesRequestConverters::clone, options,
             ResizeResponse::fromXContent, listener, emptySet());
     }
 
@@ -957,9 +997,10 @@ public final class IndicesClient {
      * @param rolloverRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void rolloverAsync(RolloverRequest rolloverRequest, RequestOptions options, ActionListener<RolloverResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(rolloverRequest, IndicesRequestConverters::rollover, options,
+    public Cancellable rolloverAsync(RolloverRequest rolloverRequest, RequestOptions options, ActionListener<RolloverResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(rolloverRequest, IndicesRequestConverters::rollover, options,
                 RolloverResponse::fromXContent, listener, emptySet());
     }
 
@@ -995,11 +1036,13 @@ public final class IndicesClient {
      * @deprecated This method uses deprecated request and response objects.
      * The method {@link #rolloverAsync(RolloverRequest, RequestOptions, ActionListener)} should be used instead, which
      * accepts a new request object.
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void rolloverAsync(org.elasticsearch.action.admin.indices.rollover.RolloverRequest rolloverRequest,
-            RequestOptions options, ActionListener<org.elasticsearch.action.admin.indices.rollover.RolloverResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(rolloverRequest, IndicesRequestConverters::rollover, options,
+    public Cancellable rolloverAsync(org.elasticsearch.action.admin.indices.rollover.RolloverRequest rolloverRequest,
+            RequestOptions options,
+            ActionListener<org.elasticsearch.action.admin.indices.rollover.RolloverResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(rolloverRequest, IndicesRequestConverters::rollover, options,
             org.elasticsearch.action.admin.indices.rollover.RolloverResponse::fromXContent, listener, emptySet());
     }
 
@@ -1024,9 +1067,12 @@ public final class IndicesClient {
      * @param getAliasesRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getAliasAsync(GetAliasesRequest getAliasesRequest, RequestOptions options, ActionListener<GetAliasesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getAliasesRequest, IndicesRequestConverters::getAlias, options,
+    public Cancellable getAliasAsync(GetAliasesRequest getAliasesRequest, RequestOptions options,
+                                     ActionListener<GetAliasesResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(getAliasesRequest,
+            IndicesRequestConverters::getAlias, options,
             GetAliasesResponse::fromXContent, listener, singleton(RestStatus.NOT_FOUND.getStatus()));
     }
 
@@ -1051,10 +1097,12 @@ public final class IndicesClient {
      * @param updateSettingsRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putSettingsAsync(UpdateSettingsRequest updateSettingsRequest, RequestOptions options,
+    public Cancellable putSettingsAsync(UpdateSettingsRequest updateSettingsRequest, RequestOptions options,
                                         ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(updateSettingsRequest, IndicesRequestConverters::indexPutSettings, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(updateSettingsRequest,
+            IndicesRequestConverters::indexPutSettings, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -1088,11 +1136,14 @@ public final class IndicesClient {
      * @deprecated This old form of request allows types in mappings.
      * Use {@link #putTemplateAsync(PutIndexTemplateRequest, RequestOptions, ActionListener)}
      * instead which introduces a new request object without types.
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void putTemplateAsync(org.elasticsearch.action.admin.indices.template.put.PutIndexTemplateRequest putIndexTemplateRequest,
+    public Cancellable putTemplateAsync(
+                org.elasticsearch.action.admin.indices.template.put.PutIndexTemplateRequest putIndexTemplateRequest,
                 RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(putIndexTemplateRequest, IndicesRequestConverters::putTemplate, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(putIndexTemplateRequest,
+            IndicesRequestConverters::putTemplate, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -1120,10 +1171,12 @@ public final class IndicesClient {
      * @param putIndexTemplateRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putTemplateAsync(PutIndexTemplateRequest putIndexTemplateRequest,
+    public Cancellable putTemplateAsync(PutIndexTemplateRequest putIndexTemplateRequest,
                                         RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(putIndexTemplateRequest, IndicesRequestConverters::putTemplate, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(putIndexTemplateRequest,
+            IndicesRequestConverters::putTemplate, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -1137,8 +1190,10 @@ public final class IndicesClient {
      * @return the response
      * @throws IOException in case there is a problem sending the request or parsing back the response
      */
-    public ValidateQueryResponse validateQuery(ValidateQueryRequest validateQueryRequest, RequestOptions options) throws IOException {
-        return restHighLevelClient.performRequestAndParseEntity(validateQueryRequest, IndicesRequestConverters::validateQuery, options,
+    public ValidateQueryResponse validateQuery(ValidateQueryRequest validateQueryRequest,
+                                               RequestOptions options) throws IOException {
+        return restHighLevelClient.performRequestAndParseEntity(validateQueryRequest,
+            IndicesRequestConverters::validateQuery, options,
             ValidateQueryResponse::fromXContent, emptySet());
     }
 
@@ -1150,10 +1205,12 @@ public final class IndicesClient {
      * @param validateQueryRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void validateQueryAsync(ValidateQueryRequest validateQueryRequest, RequestOptions options,
+    public Cancellable validateQueryAsync(ValidateQueryRequest validateQueryRequest, RequestOptions options,
                                           ActionListener<ValidateQueryResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(validateQueryRequest, IndicesRequestConverters::validateQuery, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(validateQueryRequest,
+            IndicesRequestConverters::validateQuery, options,
             ValidateQueryResponse::fromXContent, listener, emptySet());
     }
 
@@ -1174,7 +1231,8 @@ public final class IndicesClient {
             GetIndexTemplatesRequest getIndexTemplatesRequest, RequestOptions options) throws IOException {
         return restHighLevelClient.performRequestAndParseEntity(getIndexTemplatesRequest,
             IndicesRequestConverters::getTemplatesWithDocumentTypes,
-            options, org.elasticsearch.action.admin.indices.template.get.GetIndexTemplatesResponse::fromXContent, emptySet());
+            options,
+            org.elasticsearch.action.admin.indices.template.get.GetIndexTemplatesResponse::fromXContent, emptySet());
     }
 
     /**
@@ -1186,8 +1244,8 @@ public final class IndicesClient {
      * @return the response
      * @throws IOException in case there is a problem sending the request or parsing back the response
      */
-    public GetIndexTemplatesResponse getIndexTemplate(GetIndexTemplatesRequest getIndexTemplatesRequest, RequestOptions options)
-                                                  throws IOException {
+    public GetIndexTemplatesResponse getIndexTemplate(GetIndexTemplatesRequest getIndexTemplatesRequest,
+                  RequestOptions options) throws IOException {
         return restHighLevelClient.performRequestAndParseEntity(getIndexTemplatesRequest,
             IndicesRequestConverters::getTemplates,
             options, GetIndexTemplatesResponse::fromXContent, emptySet());
@@ -1203,13 +1261,16 @@ public final class IndicesClient {
      * @param listener the listener to be notified upon request completion
      * @deprecated This method uses an old response object which still refers to types, a deprecated feature. Use
      * {@link #getIndexTemplateAsync(GetIndexTemplatesRequest, RequestOptions, ActionListener)} instead which returns a new response object
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void getTemplateAsync(GetIndexTemplatesRequest getIndexTemplatesRequest, RequestOptions options,
+    public Cancellable getTemplateAsync(GetIndexTemplatesRequest getIndexTemplatesRequest, RequestOptions options,
             ActionListener<org.elasticsearch.action.admin.indices.template.get.GetIndexTemplatesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getIndexTemplatesRequest,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(getIndexTemplatesRequest,
             IndicesRequestConverters::getTemplatesWithDocumentTypes,
-            options, org.elasticsearch.action.admin.indices.template.get.GetIndexTemplatesResponse::fromXContent, listener, emptySet());
+            options,
+            org.elasticsearch.action.admin.indices.template.get.GetIndexTemplatesResponse::fromXContent,
+            listener, emptySet());
     }
 
     /**
@@ -1219,10 +1280,11 @@ public final class IndicesClient {
      * @param getIndexTemplatesRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getIndexTemplateAsync(GetIndexTemplatesRequest getIndexTemplatesRequest, RequestOptions options,
+    public Cancellable getIndexTemplateAsync(GetIndexTemplatesRequest getIndexTemplatesRequest, RequestOptions options,
                                              ActionListener<GetIndexTemplatesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getIndexTemplatesRequest,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(getIndexTemplatesRequest,
             IndicesRequestConverters::getTemplates,
             options, GetIndexTemplatesResponse::fromXContent, listener, emptySet());
     }
@@ -1235,24 +1297,26 @@ public final class IndicesClient {
      * @return true if any index templates in the request exist, false otherwise
      * @throws IOException in case there is a problem sending the request or parsing back the response
      */
-    public boolean existsTemplate(IndexTemplatesExistRequest indexTemplatesRequest, RequestOptions options) throws IOException {
-        return restHighLevelClient.performRequest(indexTemplatesRequest, IndicesRequestConverters::templatesExist, options,
+    public boolean existsTemplate(IndexTemplatesExistRequest indexTemplatesRequest,
+                                  RequestOptions options) throws IOException {
+        return restHighLevelClient.performRequest(indexTemplatesRequest,
+            IndicesRequestConverters::templatesExist, options,
             RestHighLevelClient::convertExistsResponse, emptySet());
     }
 
     /**
      * Uses the Index Templates API to determine if index templates exist
-     *
      * @param indexTemplatesExistRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion. The listener will be called with the value {@code true}
-     *                 if any index templates in the request exist, false otherwise
+     * @return cancellable that may be used to cancel the request
      */
-    public void existsTemplateAsync(IndexTemplatesExistRequest indexTemplatesExistRequest,
+    public Cancellable existsTemplateAsync(IndexTemplatesExistRequest indexTemplatesExistRequest,
                                            RequestOptions options,
                                            ActionListener<Boolean> listener) {
 
-        restHighLevelClient.performRequestAsync(indexTemplatesExistRequest, IndicesRequestConverters::templatesExist, options,
+        return restHighLevelClient.performRequestAsync(indexTemplatesExistRequest,
+            IndicesRequestConverters::templatesExist, options,
             RestHighLevelClient::convertExistsResponse, listener, emptySet());
     }
 
@@ -1273,14 +1337,14 @@ public final class IndicesClient {
      * Asynchronously calls the analyze API
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-analyze.html">Analyze API on elastic.co</a>
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void analyzeAsync(AnalyzeRequest request, RequestOptions options,
+    public Cancellable analyzeAsync(AnalyzeRequest request, RequestOptions options,
                                     ActionListener<AnalyzeResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndicesRequestConverters::analyze, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndicesRequestConverters::analyze, options,
             AnalyzeResponse::fromXContent, listener, emptySet());
     }
 
@@ -1297,13 +1361,14 @@ public final class IndicesClient {
 
     /**
      * Asynchronously calls the _freeze API
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void freezeAsync(FreezeIndexRequest request, RequestOptions options, ActionListener<ShardsAcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndicesRequestConverters::freezeIndex, options,
+    public Cancellable freezeAsync(FreezeIndexRequest request, RequestOptions options,
+                                   ActionListener<ShardsAcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndicesRequestConverters::freezeIndex, options,
             ShardsAcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -1320,13 +1385,15 @@ public final class IndicesClient {
 
     /**
      * Asynchronously calls the _unfreeze API
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void unfreezeAsync(UnfreezeIndexRequest request, RequestOptions options, ActionListener<ShardsAcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndicesRequestConverters::unfreezeIndex, options,
+    public Cancellable unfreezeAsync(UnfreezeIndexRequest request, RequestOptions options,
+                                     ActionListener<ShardsAcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
+            IndicesRequestConverters::unfreezeIndex, options,
             ShardsAcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -1348,14 +1415,14 @@ public final class IndicesClient {
      * Asynchronously delete an index template using the Index Templates API
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-templates.html"> Index Templates API
      * on elastic.co</a>
-     *
      * @param request  the request
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteTemplateAsync(DeleteIndexTemplateRequest request, RequestOptions options,
+    public Cancellable deleteTemplateAsync(DeleteIndexTemplateRequest request, RequestOptions options,
                                            ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndicesRequestConverters::deleteTemplate,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndicesRequestConverters::deleteTemplate,
             options, AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -1372,14 +1439,14 @@ public final class IndicesClient {
 
     /**
      * Asynchronously calls the _reload_search_analyzers API
-     *
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void reloadAnalyzersAsync(ReloadAnalyzersRequest request, RequestOptions options,
+    public Cancellable reloadAnalyzersAsync(ReloadAnalyzersRequest request, RequestOptions options,
                                             ActionListener<ReloadAnalyzersResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, IndicesRequestConverters::reloadAnalyzers, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, IndicesRequestConverters::reloadAnalyzers, options,
                 ReloadAnalyzersResponse::fromXContent, listener, emptySet());
     }
 }

client/rest-high-level/src/main/java/org/elasticsearch/client/IngestClient.java

@@ -67,9 +67,10 @@ public final class IngestClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putPipelineAsync(PutPipelineRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity( request, IngestRequestConverters::putPipeline, options,
+    public Cancellable putPipelineAsync(PutPipelineRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity( request, IngestRequestConverters::putPipeline, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -94,9 +95,10 @@ public final class IngestClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getPipelineAsync(GetPipelineRequest request, RequestOptions options, ActionListener<GetPipelineResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity( request, IngestRequestConverters::getPipeline, options,
+    public Cancellable getPipelineAsync(GetPipelineRequest request, RequestOptions options, ActionListener<GetPipelineResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity( request, IngestRequestConverters::getPipeline, options,
             GetPipelineResponse::fromXContent, listener, Collections.singleton(404));
     }
 
@@ -123,9 +125,12 @@ public final class IngestClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deletePipelineAsync(DeletePipelineRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity( request, IngestRequestConverters::deletePipeline, options,
+    public Cancellable deletePipelineAsync(DeletePipelineRequest request, RequestOptions options,
+                                           ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity( request,
+            IngestRequestConverters::deletePipeline, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -154,11 +159,12 @@ public final class IngestClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void simulateAsync(SimulatePipelineRequest request,
+    public Cancellable simulateAsync(SimulatePipelineRequest request,
                                      RequestOptions options,
                                      ActionListener<SimulatePipelineResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity( request, IngestRequestConverters::simulatePipeline, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity( request, IngestRequestConverters::simulatePipeline, options,
             SimulatePipelineResponse::fromXContent, listener, emptySet());
     }
 }

client/rest-high-level/src/main/java/org/elasticsearch/client/LicenseClient.java

@@ -80,9 +80,10 @@ public final class LicenseClient {
      * Asynchronously updates license for the cluster.
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putLicenseAsync(PutLicenseRequest request, RequestOptions options, ActionListener<PutLicenseResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, LicenseRequestConverters::putLicense, options,
+    public Cancellable putLicenseAsync(PutLicenseRequest request, RequestOptions options, ActionListener<PutLicenseResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, LicenseRequestConverters::putLicense, options,
             PutLicenseResponse::fromXContent, listener, emptySet());
     }
 
@@ -101,9 +102,10 @@ public final class LicenseClient {
      * Asynchronously returns the current license for the cluster cluster.
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getLicenseAsync(GetLicenseRequest request, RequestOptions options, ActionListener<GetLicenseResponse> listener) {
-        restHighLevelClient.performRequestAsync(request, LicenseRequestConverters::getLicense, options,
+    public Cancellable getLicenseAsync(GetLicenseRequest request, RequestOptions options, ActionListener<GetLicenseResponse> listener) {
+        return restHighLevelClient.performRequestAsync(request, LicenseRequestConverters::getLicense, options,
             response -> new GetLicenseResponse(convertResponseToJson(response)), listener, emptySet());
     }
 
@@ -122,9 +124,12 @@ public final class LicenseClient {
      * Asynchronously deletes license from the cluster.
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteLicenseAsync(DeleteLicenseRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, LicenseRequestConverters::deleteLicense, options,
+    public Cancellable deleteLicenseAsync(DeleteLicenseRequest request, RequestOptions options,
+                                          ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
+            LicenseRequestConverters::deleteLicense, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -143,12 +148,13 @@ public final class LicenseClient {
      * Asynchronously starts a trial license on the cluster.
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void startTrialAsync(StartTrialRequest request,
+    public Cancellable startTrialAsync(StartTrialRequest request,
                                        RequestOptions options,
                                        ActionListener<StartTrialResponse> listener) {
 
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, LicenseRequestConverters::startTrial, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, LicenseRequestConverters::startTrial, options,
             StartTrialResponse::fromXContent, listener, singleton(403));
     }
 
@@ -167,10 +173,11 @@ public final class LicenseClient {
      * Asynchronously initiates an indefinite basic license.
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void startBasicAsync(StartBasicRequest request, RequestOptions options,
+    public Cancellable startBasicAsync(StartBasicRequest request, RequestOptions options,
                                        ActionListener<StartBasicResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, LicenseRequestConverters::startBasic, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, LicenseRequestConverters::startBasic, options,
             StartBasicResponse::fromXContent, listener, emptySet());
     }
 

client/rest-high-level/src/main/java/org/elasticsearch/client/MachineLearningClient.java

@@ -153,13 +153,13 @@ public final class MachineLearningClient {
      * <p>
      * For additional info
      * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ml-put-job.html">ML PUT job documentation</a>
-     *
      * @param request  The request containing the {@link org.elasticsearch.client.ml.job.config.Job} settings
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putJobAsync(PutJobRequest request, RequestOptions options, ActionListener<PutJobResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable putJobAsync(PutJobRequest request, RequestOptions options, ActionListener<PutJobResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::putJob,
                 options,
                 PutJobResponse::fromXContent,
@@ -192,13 +192,13 @@ public final class MachineLearningClient {
      * <p>
      * For additional info
      * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ml-get-job.html">ML GET job documentation</a>
-     *
      * @param request  {@link GetJobRequest} Request containing a list of jobId(s) and additional options
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified with {@link GetJobResponse} upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getJobAsync(GetJobRequest request, RequestOptions options, ActionListener<GetJobResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable getJobAsync(GetJobRequest request, RequestOptions options, ActionListener<GetJobResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::getJob,
                 options,
                 GetJobResponse::fromXContent,
@@ -231,13 +231,13 @@ public final class MachineLearningClient {
      * <p>
      * For additional info
      * see <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/ml-get-job-stats.html">Get job stats docs</a>
-     *
      * @param request  {@link GetJobStatsRequest} Request containing a list of jobId(s) and additional options
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified with {@link GetJobStatsResponse} upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getJobStatsAsync(GetJobStatsRequest request, RequestOptions options, ActionListener<GetJobStatsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable getJobStatsAsync(GetJobStatsRequest request, RequestOptions options, ActionListener<GetJobStatsResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::getJobStats,
                 options,
                 GetJobStatsResponse::fromXContent,
@@ -272,14 +272,14 @@ public final class MachineLearningClient {
      * For additional info
      * see <a href="http://www.elastic.co/guide/en/elasticsearch/reference/current/ml-delete-expired-data.html">ML Delete Expired Data
      * documentation</a>
-     *
      * @param request  The request to delete expired ML data
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteExpiredDataAsync(DeleteExpiredDataRequest request, RequestOptions options,
+    public Cancellable deleteExpiredDataAsync(DeleteExpiredDataRequest request, RequestOptions options,
                                               ActionListener<DeleteExpiredDataResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::deleteExpiredData,
             options,
             DeleteExpiredDataResponse::fromXContent,
@@ -316,9 +316,10 @@ public final class MachineLearningClient {
      *  @param request  The request to delete the job
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteJobAsync(DeleteJobRequest request, RequestOptions options, ActionListener<DeleteJobResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable deleteJobAsync(DeleteJobRequest request, RequestOptions options, ActionListener<DeleteJobResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::deleteJob,
             options,
             DeleteJobResponse::fromXContent,
@@ -360,9 +361,10 @@ public final class MachineLearningClient {
      * @param request  Request containing job_id and additional optional options
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void openJobAsync(OpenJobRequest request, RequestOptions options, ActionListener<OpenJobResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable openJobAsync(OpenJobRequest request, RequestOptions options, ActionListener<OpenJobResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::openJob,
                 options,
                 OpenJobResponse::fromXContent,
@@ -400,9 +402,10 @@ public final class MachineLearningClient {
      * @param request  Request containing job_ids and additional options. See {@link CloseJobRequest}
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void closeJobAsync(CloseJobRequest request, RequestOptions options, ActionListener<CloseJobResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable closeJobAsync(CloseJobRequest request, RequestOptions options, ActionListener<CloseJobResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::closeJob,
                 options,
                 CloseJobResponse::fromXContent,
@@ -449,9 +452,10 @@ public final class MachineLearningClient {
      * @param request  The {@link FlushJobRequest} object enclosing the `jobId` and additional request options
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void flushJobAsync(FlushJobRequest request, RequestOptions options, ActionListener<FlushJobResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable flushJobAsync(FlushJobRequest request, RequestOptions options, ActionListener<FlushJobResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::flushJob,
                 options,
                 FlushJobResponse::fromXContent,
@@ -489,9 +493,10 @@ public final class MachineLearningClient {
      * @param request  ForecastJobRequest with forecasting options
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void forecastJobAsync(ForecastJobRequest request, RequestOptions options, ActionListener<ForecastJobResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable forecastJobAsync(ForecastJobRequest request, RequestOptions options, ActionListener<ForecastJobResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::forecastJob,
                 options,
                 ForecastJobResponse::fromXContent,
@@ -529,9 +534,11 @@ public final class MachineLearningClient {
      * @param request  the {@link DeleteForecastRequest} object enclosing the desired jobId, forecastIDs, and other options
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteForecastAsync(DeleteForecastRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable deleteForecastAsync(DeleteForecastRequest request, RequestOptions options,
+                                           ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::deleteForecast,
                 options,
                 AcknowledgedResponse::fromXContent,
@@ -569,10 +576,11 @@ public final class MachineLearningClient {
      * @param request The request to delete the model snapshot
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteModelSnapshotAsync(DeleteModelSnapshotRequest request, RequestOptions options,
+    public Cancellable deleteModelSnapshotAsync(DeleteModelSnapshotRequest request, RequestOptions options,
                                                 ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::deleteModelSnapshot,
             options,
             AcknowledgedResponse::fromXContent,
@@ -610,10 +618,11 @@ public final class MachineLearningClient {
      * @param request The request to revert to a previous model snapshot
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void revertModelSnapshotAsync(RevertModelSnapshotRequest request, RequestOptions options,
+    public Cancellable revertModelSnapshotAsync(RevertModelSnapshotRequest request, RequestOptions options,
                                                 ActionListener<RevertModelSnapshotResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::revertModelSnapshot,
             options,
             RevertModelSnapshotResponse::fromXContent,
@@ -649,9 +658,10 @@ public final class MachineLearningClient {
      * @param request The request containing the {@link org.elasticsearch.client.ml.datafeed.DatafeedConfig} settings
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putDatafeedAsync(PutDatafeedRequest request, RequestOptions options, ActionListener<PutDatafeedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable putDatafeedAsync(PutDatafeedRequest request, RequestOptions options, ActionListener<PutDatafeedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::putDatafeed,
                 options,
                 PutDatafeedResponse::fromXContent,
@@ -689,9 +699,11 @@ public final class MachineLearningClient {
      * @param request The request containing the {@link org.elasticsearch.client.ml.datafeed.DatafeedUpdate} settings
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void updateDatafeedAsync(UpdateDatafeedRequest request, RequestOptions options, ActionListener<PutDatafeedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable updateDatafeedAsync(UpdateDatafeedRequest request, RequestOptions options,
+                                           ActionListener<PutDatafeedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::updateDatafeed,
             options,
             PutDatafeedResponse::fromXContent,
@@ -730,9 +742,11 @@ public final class MachineLearningClient {
      * @param request {@link GetDatafeedRequest} Request containing a list of datafeedId(s) and additional options
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified with {@link GetDatafeedResponse} upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getDatafeedAsync(GetDatafeedRequest request, RequestOptions options, ActionListener<GetDatafeedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable getDatafeedAsync(GetDatafeedRequest request, RequestOptions options,
+                                        ActionListener<GetDatafeedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::getDatafeed,
                 options,
                 GetDatafeedResponse::fromXContent,
@@ -770,9 +784,11 @@ public final class MachineLearningClient {
      * @param request The request to delete the datafeed
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteDatafeedAsync(DeleteDatafeedRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable deleteDatafeedAsync(DeleteDatafeedRequest request, RequestOptions options,
+                                           ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::deleteDatafeed,
                 options,
                 AcknowledgedResponse::fromXContent,
@@ -810,9 +826,11 @@ public final class MachineLearningClient {
      * @param request The request to start the datafeed
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void startDatafeedAsync(StartDatafeedRequest request, RequestOptions options, ActionListener<StartDatafeedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable startDatafeedAsync(StartDatafeedRequest request, RequestOptions options,
+                                          ActionListener<StartDatafeedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::startDatafeed,
             options,
             StartDatafeedResponse::fromXContent,
@@ -850,9 +868,11 @@ public final class MachineLearningClient {
      * @param request The request to stop the datafeed
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void stopDatafeedAsync(StopDatafeedRequest request, RequestOptions options, ActionListener<StopDatafeedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable stopDatafeedAsync(StopDatafeedRequest request, RequestOptions options,
+                                         ActionListener<StopDatafeedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::stopDatafeed,
             options,
             StopDatafeedResponse::fromXContent,
@@ -910,11 +930,12 @@ public final class MachineLearningClient {
      * @param request  {@link GetDatafeedStatsRequest} Request containing a list of datafeedId(s) and additional options
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified with {@link GetDatafeedStatsResponse} upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getDatafeedStatsAsync(GetDatafeedStatsRequest request,
+    public Cancellable getDatafeedStatsAsync(GetDatafeedStatsRequest request,
                                              RequestOptions options,
                                              ActionListener<GetDatafeedStatsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::getDatafeedStats,
             options,
             GetDatafeedStatsResponse::fromXContent,
@@ -932,11 +953,12 @@ public final class MachineLearningClient {
      * @param request The request to preview the datafeed
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void previewDatafeedAsync(PreviewDatafeedRequest request,
+    public Cancellable previewDatafeedAsync(PreviewDatafeedRequest request,
                                             RequestOptions options,
                                             ActionListener<PreviewDatafeedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::previewDatafeed,
             options,
             PreviewDatafeedResponse::fromXContent,
@@ -972,9 +994,10 @@ public final class MachineLearningClient {
      * @param request  the {@link UpdateJobRequest} object enclosing the desired updates
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void updateJobAsync(UpdateJobRequest request, RequestOptions options, ActionListener<PutJobResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable updateJobAsync(UpdateJobRequest request, RequestOptions options, ActionListener<PutJobResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::updateJob,
                 options,
                 PutJobResponse::fromXContent,
@@ -1008,9 +1031,10 @@ public final class MachineLearningClient {
      *  @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getBucketsAsync(GetBucketsRequest request, RequestOptions options, ActionListener<GetBucketsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable getBucketsAsync(GetBucketsRequest request, RequestOptions options, ActionListener<GetBucketsResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::getBuckets,
                 options,
                 GetBucketsResponse::fromXContent,
@@ -1047,9 +1071,11 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getCategoriesAsync(GetCategoriesRequest request, RequestOptions options, ActionListener<GetCategoriesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable getCategoriesAsync(GetCategoriesRequest request, RequestOptions options,
+                                          ActionListener<GetCategoriesResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::getCategories,
                 options,
                 GetCategoriesResponse::fromXContent,
@@ -1086,10 +1112,11 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getModelSnapshotsAsync(GetModelSnapshotsRequest request, RequestOptions options,
+    public Cancellable getModelSnapshotsAsync(GetModelSnapshotsRequest request, RequestOptions options,
                                               ActionListener<GetModelSnapshotsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::getModelSnapshots,
             options,
             GetModelSnapshotsResponse::fromXContent,
@@ -1127,10 +1154,11 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void updateModelSnapshotAsync(UpdateModelSnapshotRequest request, RequestOptions options,
+    public Cancellable updateModelSnapshotAsync(UpdateModelSnapshotRequest request, RequestOptions options,
                                                 ActionListener<UpdateModelSnapshotResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::updateModelSnapshot,
             options,
             UpdateModelSnapshotResponse::fromXContent,
@@ -1166,10 +1194,11 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getOverallBucketsAsync(GetOverallBucketsRequest request, RequestOptions options,
+    public Cancellable getOverallBucketsAsync(GetOverallBucketsRequest request, RequestOptions options,
                                               ActionListener<GetOverallBucketsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::getOverallBuckets,
                 options,
                 GetOverallBucketsResponse::fromXContent,
@@ -1203,9 +1232,10 @@ public final class MachineLearningClient {
      * @param request  the request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getRecordsAsync(GetRecordsRequest request, RequestOptions options, ActionListener<GetRecordsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable getRecordsAsync(GetRecordsRequest request, RequestOptions options, ActionListener<GetRecordsResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::getRecords,
                 options,
                 GetRecordsResponse::fromXContent,
@@ -1245,9 +1275,10 @@ public final class MachineLearningClient {
      * @param request  PostDataRequest containing the data to post and some additional options
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void postDataAsync(PostDataRequest request, RequestOptions options, ActionListener<PostDataResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable postDataAsync(PostDataRequest request, RequestOptions options, ActionListener<PostDataResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::postData,
                 options,
                 PostDataResponse::fromXContent,
@@ -1283,9 +1314,11 @@ public final class MachineLearningClient {
      * @param request The calendars request
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getCalendarsAsync(GetCalendarsRequest request, RequestOptions options, ActionListener<GetCalendarsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable getCalendarsAsync(GetCalendarsRequest request, RequestOptions options,
+                                         ActionListener<GetCalendarsResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::getCalendars,
                 options,
                 GetCalendarsResponse::fromXContent,
@@ -1321,10 +1354,11 @@ public final class MachineLearningClient {
      * @param request  the request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getInfluencersAsync(GetInfluencersRequest request, RequestOptions options,
+    public Cancellable getInfluencersAsync(GetInfluencersRequest request, RequestOptions options,
                                            ActionListener<GetInfluencersResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::getInfluencers,
                 options,
                 GetInfluencersResponse::fromXContent,
@@ -1362,9 +1396,10 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putCalendarAsync(PutCalendarRequest request, RequestOptions options, ActionListener<PutCalendarResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable putCalendarAsync(PutCalendarRequest request, RequestOptions options, ActionListener<PutCalendarResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::putCalendar,
                 options,
                 PutCalendarResponse::fromXContent,
@@ -1402,9 +1437,11 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putCalendarJobAsync(PutCalendarJobRequest request, RequestOptions options, ActionListener<PutCalendarResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable putCalendarJobAsync(PutCalendarJobRequest request, RequestOptions options,
+                                           ActionListener<PutCalendarResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::putCalendarJob,
             options,
             PutCalendarResponse::fromXContent,
@@ -1442,11 +1479,12 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteCalendarJobAsync(DeleteCalendarJobRequest request,
+    public Cancellable deleteCalendarJobAsync(DeleteCalendarJobRequest request,
                                               RequestOptions options,
                                               ActionListener<PutCalendarResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::deleteCalendarJob,
             options,
             PutCalendarResponse::fromXContent,
@@ -1484,9 +1522,11 @@ public final class MachineLearningClient {
      * @param request  The request to delete the calendar
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteCalendarAsync(DeleteCalendarRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable deleteCalendarAsync(DeleteCalendarRequest request, RequestOptions options,
+                                           ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
                 MLRequestConverters::deleteCalendar,
                 options,
                 AcknowledgedResponse::fromXContent,
@@ -1524,10 +1564,11 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getCalendarEventsAsync(GetCalendarEventsRequest request, RequestOptions options,
+    public Cancellable getCalendarEventsAsync(GetCalendarEventsRequest request, RequestOptions options,
                                               ActionListener<GetCalendarEventsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::getCalendarEvents,
             options,
             GetCalendarEventsResponse::fromXContent,
@@ -1565,10 +1606,11 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void postCalendarEventAsync(PostCalendarEventRequest request, RequestOptions options,
+    public Cancellable postCalendarEventAsync(PostCalendarEventRequest request, RequestOptions options,
                                               ActionListener<PostCalendarEventResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::postCalendarEvents,
             options,
             PostCalendarEventResponse::fromXContent,
@@ -1606,11 +1648,12 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteCalendarEventAsync(DeleteCalendarEventRequest request,
+    public Cancellable deleteCalendarEventAsync(DeleteCalendarEventRequest request,
                                                 RequestOptions options,
                                                 ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::deleteCalendarEvent,
             options,
             AcknowledgedResponse::fromXContent,
@@ -1646,9 +1689,10 @@ public final class MachineLearningClient {
      * @param request  The request containing the {@link org.elasticsearch.client.ml.job.config.MlFilter} settings
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putFilterAsync(PutFilterRequest request, RequestOptions options, ActionListener<PutFilterResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable putFilterAsync(PutFilterRequest request, RequestOptions options, ActionListener<PutFilterResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::putFilter,
             options,
             PutFilterResponse::fromXContent,
@@ -1684,9 +1728,10 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getFilterAsync(GetFiltersRequest request, RequestOptions options, ActionListener<GetFiltersResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable getFilterAsync(GetFiltersRequest request, RequestOptions options, ActionListener<GetFiltersResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::getFilter,
             options,
             GetFiltersResponse::fromXContent,
@@ -1724,9 +1769,10 @@ public final class MachineLearningClient {
      * @param request  The request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void updateFilterAsync(UpdateFilterRequest request, RequestOptions options, ActionListener<PutFilterResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable updateFilterAsync(UpdateFilterRequest request, RequestOptions options, ActionListener<PutFilterResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::updateFilter,
             options,
             PutFilterResponse::fromXContent,
@@ -1764,9 +1810,11 @@ public final class MachineLearningClient {
      * @param request The request to delete the filter
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteFilterAsync(DeleteFilterRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable deleteFilterAsync(DeleteFilterRequest request, RequestOptions options,
+                                         ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::deleteFilter,
             options,
             AcknowledgedResponse::fromXContent,
@@ -1802,9 +1850,10 @@ public final class MachineLearningClient {
      * @param request The request of Machine Learning info
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getMlInfoAsync(MlInfoRequest request, RequestOptions options, ActionListener<MlInfoResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable getMlInfoAsync(MlInfoRequest request, RequestOptions options, ActionListener<MlInfoResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::mlInfo,
             options,
             MlInfoResponse::fromXContent,
@@ -1842,10 +1891,11 @@ public final class MachineLearningClient {
      * @param request The find file structure request
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void findFileStructureAsync(FindFileStructureRequest request, RequestOptions options,
+    public Cancellable findFileStructureAsync(FindFileStructureRequest request, RequestOptions options,
                                               ActionListener<FindFileStructureResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::findFileStructure,
             options,
             FindFileStructureResponse::fromXContent,
@@ -1881,9 +1931,11 @@ public final class MachineLearningClient {
      * @param request The request of Machine Learning info
      * @param options  Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void setUpgradeModeAsync(SetUpgradeModeRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable setUpgradeModeAsync(SetUpgradeModeRequest request, RequestOptions options,
+                                           ActionListener<AcknowledgedResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::setUpgradeMode,
             options,
             AcknowledgedResponse::fromXContent,
@@ -1925,10 +1977,11 @@ public final class MachineLearningClient {
      * {@link org.elasticsearch.client.ml.dataframe.DataFrameAnalyticsConfig}
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putDataFrameAnalyticsAsync(PutDataFrameAnalyticsRequest request, RequestOptions options,
+    public Cancellable putDataFrameAnalyticsAsync(PutDataFrameAnalyticsRequest request, RequestOptions options,
                                                   ActionListener<PutDataFrameAnalyticsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::putDataFrameAnalytics,
             options,
             PutDataFrameAnalyticsResponse::fromXContent,
@@ -1967,10 +2020,11 @@ public final class MachineLearningClient {
      * @param request The {@link GetDataFrameAnalyticsRequest}
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getDataFrameAnalyticsAsync(GetDataFrameAnalyticsRequest request, RequestOptions options,
+    public Cancellable getDataFrameAnalyticsAsync(GetDataFrameAnalyticsRequest request, RequestOptions options,
                                                   ActionListener<GetDataFrameAnalyticsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::getDataFrameAnalytics,
             options,
             GetDataFrameAnalyticsResponse::fromXContent,
@@ -2008,10 +2062,11 @@ public final class MachineLearningClient {
      * @param request The {@link GetDataFrameAnalyticsStatsRequest}
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getDataFrameAnalyticsStatsAsync(GetDataFrameAnalyticsStatsRequest request, RequestOptions options,
+    public Cancellable getDataFrameAnalyticsStatsAsync(GetDataFrameAnalyticsStatsRequest request, RequestOptions options,
                                                        ActionListener<GetDataFrameAnalyticsStatsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::getDataFrameAnalyticsStats,
             options,
             GetDataFrameAnalyticsStatsResponse::fromXContent,
@@ -2050,10 +2105,11 @@ public final class MachineLearningClient {
      *  @param request The {@link StartDataFrameAnalyticsRequest}
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void startDataFrameAnalyticsAsync(StartDataFrameAnalyticsRequest request, RequestOptions options,
+    public Cancellable startDataFrameAnalyticsAsync(StartDataFrameAnalyticsRequest request, RequestOptions options,
                                                     ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::startDataFrameAnalytics,
             options,
             AcknowledgedResponse::fromXContent,
@@ -2092,10 +2148,11 @@ public final class MachineLearningClient {
      * @param request The {@link StopDataFrameAnalyticsRequest}
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void stopDataFrameAnalyticsAsync(StopDataFrameAnalyticsRequest request, RequestOptions options,
+    public Cancellable stopDataFrameAnalyticsAsync(StopDataFrameAnalyticsRequest request, RequestOptions options,
                                                    ActionListener<StopDataFrameAnalyticsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::stopDataFrameAnalytics,
             options,
             StopDataFrameAnalyticsResponse::fromXContent,
@@ -2134,10 +2191,11 @@ public final class MachineLearningClient {
      * @param request The {@link DeleteDataFrameAnalyticsRequest}
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteDataFrameAnalyticsAsync(DeleteDataFrameAnalyticsRequest request, RequestOptions options,
+    public Cancellable deleteDataFrameAnalyticsAsync(DeleteDataFrameAnalyticsRequest request, RequestOptions options,
                                                      ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::deleteDataFrameAnalytics,
             options,
             AcknowledgedResponse::fromXContent,
@@ -2176,10 +2234,11 @@ public final class MachineLearningClient {
      * @param request The {@link EvaluateDataFrameRequest}
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void evaluateDataFrameAsync(EvaluateDataFrameRequest request, RequestOptions options,
+    public Cancellable evaluateDataFrameAsync(EvaluateDataFrameRequest request, RequestOptions options,
                                               ActionListener<EvaluateDataFrameResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             MLRequestConverters::evaluateDataFrame,
             options,
             EvaluateDataFrameResponse::fromXContent,
@@ -2219,10 +2278,11 @@ public final class MachineLearningClient {
      * @param request The {@link PutDataFrameAnalyticsRequest}
      * @param options Additional request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener Listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void estimateMemoryUsageAsync(PutDataFrameAnalyticsRequest request, RequestOptions options,
+    public Cancellable estimateMemoryUsageAsync(PutDataFrameAnalyticsRequest request, RequestOptions options,
                                                 ActionListener<EstimateMemoryUsageResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             request,
             MLRequestConverters::estimateMemoryUsage,
             options,

client/rest-high-level/src/main/java/org/elasticsearch/client/MigrationClient.java

@@ -58,10 +58,11 @@ public final class MigrationClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getDeprecationInfoAsync(DeprecationInfoRequest request, RequestOptions options,
+    public Cancellable getDeprecationInfoAsync(DeprecationInfoRequest request, RequestOptions options,
                                                ActionListener<DeprecationInfoResponse> listener)  {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, MigrationRequestConverters::getDeprecationInfo, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, MigrationRequestConverters::getDeprecationInfo, options,
             DeprecationInfoResponse::fromXContent, listener, Collections.emptySet());
     }
 }

client/rest-high-level/src/main/java/org/elasticsearch/client/RequestConverters.java

@@ -484,6 +484,7 @@ final class RequestConverters {
         if (multiSearchTemplateRequest.maxConcurrentSearchRequests() != MultiSearchRequest.MAX_CONCURRENT_SEARCH_REQUESTS_DEFAULT) {
             params.putParam("max_concurrent_searches", Integer.toString(multiSearchTemplateRequest.maxConcurrentSearchRequests()));
         }
+        request.addParameters(params.asMap());
 
         XContent xContent = REQUEST_BODY_CONTENT_TYPE.xContent();
         byte[] source = MultiSearchTemplateRequest.writeMultiLineFormat(multiSearchTemplateRequest, xContent);
@@ -497,8 +498,14 @@ final class RequestConverters {
         params.withRouting(countRequest.routing());
         params.withPreference(countRequest.preference());
         params.withIndicesOptions(countRequest.indicesOptions());
+        if (countRequest.terminateAfter() != 0){
+            params.withTerminateAfter(countRequest.terminateAfter());
+        }
+        if (countRequest.minScore() != null){
+            params.putParam("min_score", String.valueOf(countRequest.minScore()));
+        }
         request.addParameters(params.asMap());
-        request.setEntity(createEntity(countRequest.source(), REQUEST_BODY_CONTENT_TYPE));
+        request.setEntity(createEntity(countRequest, REQUEST_BODY_CONTENT_TYPE));
         return request;
     }
 
@@ -907,6 +914,10 @@ final class RequestConverters {
             return this;
         }
 
+        Params withTerminateAfter(int terminateAfter){
+            return putParam("terminate_after", String.valueOf(terminateAfter));
+        }
+
         Params withTimeout(TimeValue timeout) {
             return putParam("timeout", timeout);
         }

client/rest-high-level/src/main/java/org/elasticsearch/client/RestHighLevelClient.java

@@ -473,8 +473,8 @@ public class RestHighLevelClient implements Closeable {
      * are shipped with the Elastic Stack distribution of Elasticsearch. All of
      * these APIs will 404 if run against the OSS distribution of Elasticsearch.
      * <p>
-     * See the <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/data-frame-apis.html">
-     *     Data Frame APIs on elastic.co</a> for more information.
+     * See the <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/transform-apis.html">
+     *     Transform APIs on elastic.co</a> for more information.
      *
      * @return the client wrapper for making Data Frame API calls
      */
@@ -503,9 +503,11 @@ public class RestHighLevelClient implements Closeable {
      * @param bulkRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void bulkAsync(BulkRequest bulkRequest, RequestOptions options, ActionListener<BulkResponse> listener) {
-        performRequestAsyncAndParseEntity(bulkRequest, RequestConverters::bulk, options, BulkResponse::fromXContent, listener, emptySet());
+    public final Cancellable bulkAsync(BulkRequest bulkRequest, RequestOptions options, ActionListener<BulkResponse> listener) {
+        return performRequestAsyncAndParseEntity(bulkRequest, RequestConverters::bulk, options,
+            BulkResponse::fromXContent, listener, emptySet());
     }
 
     /**
@@ -540,9 +542,11 @@ public class RestHighLevelClient implements Closeable {
      * @param reindexRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void reindexAsync(ReindexRequest reindexRequest, RequestOptions options, ActionListener<BulkByScrollResponse> listener) {
-        performRequestAsyncAndParseEntity(
+    public final Cancellable reindexAsync(ReindexRequest reindexRequest, RequestOptions options,
+                                          ActionListener<BulkByScrollResponse> listener) {
+        return performRequestAsyncAndParseEntity(
             reindexRequest, RequestConverters::reindex, options, BulkByScrollResponse::fromXContent, listener, singleton(409)
         );
     }
@@ -568,10 +572,11 @@ public class RestHighLevelClient implements Closeable {
      * @param updateByQueryRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void updateByQueryAsync(UpdateByQueryRequest updateByQueryRequest, RequestOptions options,
+    public final Cancellable updateByQueryAsync(UpdateByQueryRequest updateByQueryRequest, RequestOptions options,
                                                 ActionListener<BulkByScrollResponse> listener) {
-        performRequestAsyncAndParseEntity(
+        return performRequestAsyncAndParseEntity(
             updateByQueryRequest, RequestConverters::updateByQuery, options, BulkByScrollResponse::fromXContent, listener, singleton(409)
         );
     }
@@ -597,10 +602,11 @@ public class RestHighLevelClient implements Closeable {
      * @param deleteByQueryRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void deleteByQueryAsync(DeleteByQueryRequest deleteByQueryRequest, RequestOptions options,
+    public final Cancellable deleteByQueryAsync(DeleteByQueryRequest deleteByQueryRequest, RequestOptions options,
                                                 ActionListener<BulkByScrollResponse> listener) {
-        performRequestAsyncAndParseEntity(
+        return performRequestAsyncAndParseEntity(
             deleteByQueryRequest, RequestConverters::deleteByQuery, options, BulkByScrollResponse::fromXContent, listener, singleton(409)
         );
     }
@@ -625,10 +631,11 @@ public class RestHighLevelClient implements Closeable {
      * @param rethrottleRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void deleteByQueryRethrottleAsync(RethrottleRequest rethrottleRequest, RequestOptions options,
+    public final Cancellable deleteByQueryRethrottleAsync(RethrottleRequest rethrottleRequest, RequestOptions options,
                                                           ActionListener<ListTasksResponse> listener) {
-        performRequestAsyncAndParseEntity(rethrottleRequest, RequestConverters::rethrottleDeleteByQuery, options,
+        return performRequestAsyncAndParseEntity(rethrottleRequest, RequestConverters::rethrottleDeleteByQuery, options,
                 ListTasksResponse::fromXContent, listener, emptySet());
     }
 
@@ -652,10 +659,11 @@ public class RestHighLevelClient implements Closeable {
      * @param rethrottleRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void updateByQueryRethrottleAsync(RethrottleRequest rethrottleRequest, RequestOptions options,
+    public final Cancellable updateByQueryRethrottleAsync(RethrottleRequest rethrottleRequest, RequestOptions options,
                                                           ActionListener<ListTasksResponse> listener) {
-        performRequestAsyncAndParseEntity(rethrottleRequest, RequestConverters::rethrottleUpdateByQuery, options,
+        return performRequestAsyncAndParseEntity(rethrottleRequest, RequestConverters::rethrottleUpdateByQuery, options,
                 ListTasksResponse::fromXContent, listener, emptySet());
     }
 
@@ -677,15 +685,15 @@ public class RestHighLevelClient implements Closeable {
      * Executes a reindex rethrottling request.
      * See the <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/docs-reindex.html#docs-reindex-rethrottle">
      * Reindex rethrottling API on elastic.co</a>
-     *
      * @param rethrottleRequest the request
      * @param options           the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener          the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void reindexRethrottleAsync(RethrottleRequest rethrottleRequest, RequestOptions options,
+    public final Cancellable reindexRethrottleAsync(RethrottleRequest rethrottleRequest, RequestOptions options,
                                                     ActionListener<ListTasksResponse> listener) {
-        performRequestAsyncAndParseEntity(rethrottleRequest, RequestConverters::rethrottleReindex, options, ListTasksResponse::fromXContent,
-                listener, emptySet());
+        return performRequestAsyncAndParseEntity(rethrottleRequest,
+            RequestConverters::rethrottleReindex, options, ListTasksResponse::fromXContent, listener, emptySet());
     }
 
     /**
@@ -725,9 +733,10 @@ public class RestHighLevelClient implements Closeable {
      * @param getRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void getAsync(GetRequest getRequest, RequestOptions options, ActionListener<GetResponse> listener) {
-        performRequestAsyncAndParseEntity(getRequest, RequestConverters::get, options, GetResponse::fromXContent, listener,
+    public final Cancellable getAsync(GetRequest getRequest, RequestOptions options, ActionListener<GetResponse> listener) {
+        return performRequestAsyncAndParseEntity(getRequest, RequestConverters::get, options, GetResponse::fromXContent, listener,
                 singleton(404));
     }
 
@@ -764,10 +773,12 @@ public class RestHighLevelClient implements Closeable {
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
      * @deprecated use {@link #mgetAsync(MultiGetRequest, RequestOptions, ActionListener)} instead
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public final void multiGetAsync(MultiGetRequest multiGetRequest, RequestOptions options, ActionListener<MultiGetResponse> listener) {
-        mgetAsync(multiGetRequest, options, listener);
+    public final Cancellable multiGetAsync(MultiGetRequest multiGetRequest, RequestOptions options,
+                                           ActionListener<MultiGetResponse> listener) {
+        return mgetAsync(multiGetRequest, options, listener);
     }
 
     /**
@@ -776,10 +787,12 @@ public class RestHighLevelClient implements Closeable {
      * @param multiGetRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void mgetAsync(MultiGetRequest multiGetRequest, RequestOptions options, ActionListener<MultiGetResponse> listener) {
-        performRequestAsyncAndParseEntity(multiGetRequest, RequestConverters::multiGet, options, MultiGetResponse::fromXContent, listener,
-                singleton(404));
+    public final Cancellable mgetAsync(MultiGetRequest multiGetRequest, RequestOptions options,
+                                       ActionListener<MultiGetResponse> listener) {
+        return performRequestAsyncAndParseEntity(multiGetRequest, RequestConverters::multiGet, options,
+            MultiGetResponse::fromXContent, listener, singleton(404));
     }
 
     /**
@@ -799,9 +812,10 @@ public class RestHighLevelClient implements Closeable {
      * @param getRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void existsAsync(GetRequest getRequest, RequestOptions options, ActionListener<Boolean> listener) {
-        performRequestAsync(getRequest, RequestConverters::exists, options, RestHighLevelClient::convertExistsResponse, listener,
+    public final Cancellable existsAsync(GetRequest getRequest, RequestOptions options, ActionListener<Boolean> listener) {
+        return performRequestAsync(getRequest, RequestConverters::exists, options, RestHighLevelClient::convertExistsResponse, listener,
                 emptySet());
     }
 
@@ -824,10 +838,11 @@ public class RestHighLevelClient implements Closeable {
      * @param getRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void existsSourceAsync(GetRequest getRequest, RequestOptions options, ActionListener<Boolean> listener) {
-        performRequestAsync(getRequest, RequestConverters::sourceExists, options, RestHighLevelClient::convertExistsResponse, listener,
-                emptySet());
+    public final Cancellable existsSourceAsync(GetRequest getRequest, RequestOptions options, ActionListener<Boolean> listener) {
+        return performRequestAsync(getRequest, RequestConverters::sourceExists, options,
+            RestHighLevelClient::convertExistsResponse, listener, emptySet());
     }
 
     /**
@@ -838,7 +853,8 @@ public class RestHighLevelClient implements Closeable {
      * @return the response
      */
     public final IndexResponse index(IndexRequest indexRequest, RequestOptions options) throws IOException {
-        return performRequestAndParseEntity(indexRequest, RequestConverters::index, options, IndexResponse::fromXContent, emptySet());
+        return performRequestAndParseEntity(indexRequest, RequestConverters::index, options,
+            IndexResponse::fromXContent, emptySet());
     }
 
     /**
@@ -847,9 +863,10 @@ public class RestHighLevelClient implements Closeable {
      * @param indexRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void indexAsync(IndexRequest indexRequest, RequestOptions options, ActionListener<IndexResponse> listener) {
-        performRequestAsyncAndParseEntity(indexRequest, RequestConverters::index, options, IndexResponse::fromXContent, listener,
+    public final Cancellable indexAsync(IndexRequest indexRequest, RequestOptions options, ActionListener<IndexResponse> listener) {
+        return performRequestAsyncAndParseEntity(indexRequest, RequestConverters::index, options, IndexResponse::fromXContent, listener,
                 emptySet());
     }
 
@@ -871,9 +888,10 @@ public class RestHighLevelClient implements Closeable {
      * @param countRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void countAsync(CountRequest countRequest, RequestOptions options, ActionListener<CountResponse> listener) {
-        performRequestAsyncAndParseEntity(countRequest, RequestConverters::count,  options,CountResponse::fromXContent,
+    public final Cancellable countAsync(CountRequest countRequest, RequestOptions options, ActionListener<CountResponse> listener) {
+        return performRequestAsyncAndParseEntity(countRequest, RequestConverters::count,  options,CountResponse::fromXContent,
             listener, emptySet());
     }
 
@@ -894,9 +912,10 @@ public class RestHighLevelClient implements Closeable {
      * @param updateRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void updateAsync(UpdateRequest updateRequest, RequestOptions options, ActionListener<UpdateResponse> listener) {
-        performRequestAsyncAndParseEntity(updateRequest, RequestConverters::update, options, UpdateResponse::fromXContent, listener,
+    public final Cancellable updateAsync(UpdateRequest updateRequest, RequestOptions options, ActionListener<UpdateResponse> listener) {
+        return performRequestAsyncAndParseEntity(updateRequest, RequestConverters::update, options, UpdateResponse::fromXContent, listener,
                 emptySet());
     }
 
@@ -918,9 +937,10 @@ public class RestHighLevelClient implements Closeable {
      * @param deleteRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void deleteAsync(DeleteRequest deleteRequest, RequestOptions options, ActionListener<DeleteResponse> listener) {
-        performRequestAsyncAndParseEntity(deleteRequest, RequestConverters::delete, options, DeleteResponse::fromXContent, listener,
+    public final Cancellable deleteAsync(DeleteRequest deleteRequest, RequestOptions options, ActionListener<DeleteResponse> listener) {
+        return performRequestAsyncAndParseEntity(deleteRequest, RequestConverters::delete, options, DeleteResponse::fromXContent, listener,
             Collections.singleton(404));
     }
 
@@ -946,9 +966,10 @@ public class RestHighLevelClient implements Closeable {
      * @param searchRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void searchAsync(SearchRequest searchRequest, RequestOptions options, ActionListener<SearchResponse> listener) {
-        performRequestAsyncAndParseEntity(
+    public final Cancellable searchAsync(SearchRequest searchRequest, RequestOptions options, ActionListener<SearchResponse> listener) {
+        return performRequestAsyncAndParseEntity(
                 searchRequest,
                 r -> RequestConverters.search(r, "_search"),
                 options,
@@ -992,11 +1013,12 @@ public class RestHighLevelClient implements Closeable {
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
      * @deprecated use {@link #msearchAsync(MultiSearchRequest, RequestOptions, ActionListener)} instead
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public final void multiSearchAsync(MultiSearchRequest searchRequest, RequestOptions options,
+    public final Cancellable multiSearchAsync(MultiSearchRequest searchRequest, RequestOptions options,
                                               ActionListener<MultiSearchResponse> listener) {
-        msearchAsync(searchRequest, options, listener);
+        return msearchAsync(searchRequest, options, listener);
     }
 
     /**
@@ -1006,10 +1028,11 @@ public class RestHighLevelClient implements Closeable {
      * @param searchRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void msearchAsync(MultiSearchRequest searchRequest, RequestOptions options,
+    public final Cancellable msearchAsync(MultiSearchRequest searchRequest, RequestOptions options,
                                           ActionListener<MultiSearchResponse> listener) {
-        performRequestAsyncAndParseEntity(searchRequest, RequestConverters::multiSearch, options, MultiSearchResponse::fromXContext,
+        return performRequestAsyncAndParseEntity(searchRequest, RequestConverters::multiSearch, options, MultiSearchResponse::fromXContext,
                 listener, emptySet());
     }
 
@@ -1051,11 +1074,12 @@ public class RestHighLevelClient implements Closeable {
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
      * @deprecated use {@link #scrollAsync(SearchScrollRequest, RequestOptions, ActionListener)} instead
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public final void searchScrollAsync(SearchScrollRequest searchScrollRequest, RequestOptions options,
+    public final Cancellable searchScrollAsync(SearchScrollRequest searchScrollRequest, RequestOptions options,
                                                ActionListener<SearchResponse> listener) {
-        scrollAsync(searchScrollRequest, options, listener);
+        return scrollAsync(searchScrollRequest, options, listener);
     }
 
     /**
@@ -1066,11 +1090,12 @@ public class RestHighLevelClient implements Closeable {
      * @param searchScrollRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void scrollAsync(SearchScrollRequest searchScrollRequest, RequestOptions options,
+    public final Cancellable scrollAsync(SearchScrollRequest searchScrollRequest, RequestOptions options,
                                          ActionListener<SearchResponse> listener) {
-        performRequestAsyncAndParseEntity(searchScrollRequest, RequestConverters::searchScroll, options, SearchResponse::fromXContent,
-                listener, emptySet());
+        return performRequestAsyncAndParseEntity(searchScrollRequest, RequestConverters::searchScroll,
+            options, SearchResponse::fromXContent, listener, emptySet());
     }
 
     /**
@@ -1095,11 +1120,12 @@ public class RestHighLevelClient implements Closeable {
      * @param clearScrollRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void clearScrollAsync(ClearScrollRequest clearScrollRequest, RequestOptions options,
+    public final Cancellable clearScrollAsync(ClearScrollRequest clearScrollRequest, RequestOptions options,
                                               ActionListener<ClearScrollResponse> listener) {
-        performRequestAsyncAndParseEntity(clearScrollRequest, RequestConverters::clearScroll, options, ClearScrollResponse::fromXContent,
-                listener, emptySet());
+        return performRequestAsyncAndParseEntity(clearScrollRequest, RequestConverters::clearScroll,
+            options, ClearScrollResponse::fromXContent, listener, emptySet());
     }
 
     /**
@@ -1121,10 +1147,11 @@ public class RestHighLevelClient implements Closeable {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/search-template.html">Search Template API
      * on elastic.co</a>.
+     * @return cancellable that may be used to cancel the request
      */
-    public final void searchTemplateAsync(SearchTemplateRequest searchTemplateRequest, RequestOptions options,
+    public final Cancellable searchTemplateAsync(SearchTemplateRequest searchTemplateRequest, RequestOptions options,
                                                  ActionListener<SearchTemplateResponse> listener) {
-        performRequestAsyncAndParseEntity(searchTemplateRequest, RequestConverters::searchTemplate, options,
+        return performRequestAsyncAndParseEntity(searchTemplateRequest, RequestConverters::searchTemplate, options,
             SearchTemplateResponse::fromXContent, listener, emptySet());
     }
 
@@ -1152,9 +1179,10 @@ public class RestHighLevelClient implements Closeable {
      * @param explainRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void explainAsync(ExplainRequest explainRequest, RequestOptions options, ActionListener<ExplainResponse> listener) {
-        performRequestAsync(explainRequest, RequestConverters::explain, options,
+    public final Cancellable explainAsync(ExplainRequest explainRequest, RequestOptions options, ActionListener<ExplainResponse> listener) {
+        return performRequestAsync(explainRequest, RequestConverters::explain, options,
             response -> {
                 CheckedFunction<XContentParser, ExplainResponse, IOException> entityParser =
                     parser -> ExplainResponse.fromXContent(parser, convertExistsResponse(response));
@@ -1186,9 +1214,12 @@ public class RestHighLevelClient implements Closeable {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void termvectorsAsync(TermVectorsRequest request, RequestOptions options, ActionListener<TermVectorsResponse> listener) {
-        performRequestAsyncAndParseEntity(request, RequestConverters::termVectors, options, TermVectorsResponse::fromXContent, listener,
+    public final Cancellable termvectorsAsync(TermVectorsRequest request, RequestOptions options,
+                                              ActionListener<TermVectorsResponse> listener) {
+        return performRequestAsyncAndParseEntity(request, RequestConverters::termVectors, options,
+            TermVectorsResponse::fromXContent, listener,
             emptySet());
     }
 
@@ -1216,10 +1247,11 @@ public class RestHighLevelClient implements Closeable {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void mtermvectorsAsync(MultiTermVectorsRequest request, RequestOptions options,
+    public final Cancellable mtermvectorsAsync(MultiTermVectorsRequest request, RequestOptions options,
                                                ActionListener<MultiTermVectorsResponse> listener) {
-        performRequestAsyncAndParseEntity(
+        return performRequestAsyncAndParseEntity(
             request, RequestConverters::mtermVectors, options, MultiTermVectorsResponse::fromXContent, listener, emptySet());
     }
 
@@ -1255,11 +1287,12 @@ public class RestHighLevelClient implements Closeable {
      *
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/multi-search-template.html">Multi Search Template API
      * on elastic.co</a>.
+     * @return cancellable that may be used to cancel the request
      */
-    public final void msearchTemplateAsync(MultiSearchTemplateRequest multiSearchTemplateRequest,
+    public final Cancellable msearchTemplateAsync(MultiSearchTemplateRequest multiSearchTemplateRequest,
                                                   RequestOptions options,
                                                   ActionListener<MultiSearchTemplateResponse> listener) {
-        performRequestAsyncAndParseEntity(multiSearchTemplateRequest, RequestConverters::multiSearchTemplate,
+        return performRequestAsyncAndParseEntity(multiSearchTemplateRequest, RequestConverters::multiSearchTemplate,
             options, MultiSearchTemplateResponse::fromXContext, listener, emptySet());
     }
 
@@ -1270,9 +1303,12 @@ public class RestHighLevelClient implements Closeable {
      * @param rankEvalRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void rankEvalAsync(RankEvalRequest rankEvalRequest, RequestOptions options,  ActionListener<RankEvalResponse> listener) {
-        performRequestAsyncAndParseEntity(rankEvalRequest, RequestConverters::rankEval, options,  RankEvalResponse::fromXContent, listener,
+    public final Cancellable rankEvalAsync(RankEvalRequest rankEvalRequest, RequestOptions options,
+                                           ActionListener<RankEvalResponse> listener) {
+        return performRequestAsyncAndParseEntity(rankEvalRequest, RequestConverters::rankEval, options,
+            RankEvalResponse::fromXContent, listener,
                 emptySet());
     }
 
@@ -1310,10 +1346,11 @@ public class RestHighLevelClient implements Closeable {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getScriptAsync(GetStoredScriptRequest request, RequestOptions options,
+    public Cancellable getScriptAsync(GetStoredScriptRequest request, RequestOptions options,
                                       ActionListener<GetStoredScriptResponse> listener) {
-        performRequestAsyncAndParseEntity(request, RequestConverters::getScript, options,
+        return performRequestAsyncAndParseEntity(request, RequestConverters::getScript, options,
             GetStoredScriptResponse::fromXContent, listener, emptySet());
     }
 
@@ -1337,10 +1374,11 @@ public class RestHighLevelClient implements Closeable {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteScriptAsync(DeleteStoredScriptRequest request, RequestOptions options,
+    public Cancellable deleteScriptAsync(DeleteStoredScriptRequest request, RequestOptions options,
                                          ActionListener<AcknowledgedResponse> listener) {
-        performRequestAsyncAndParseEntity(request, RequestConverters::deleteScript, options,
+        return performRequestAsyncAndParseEntity(request, RequestConverters::deleteScript, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -1365,10 +1403,11 @@ public class RestHighLevelClient implements Closeable {
      * @param putStoredScriptRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putScriptAsync(PutStoredScriptRequest putStoredScriptRequest, RequestOptions options,
+    public Cancellable putScriptAsync(PutStoredScriptRequest putStoredScriptRequest, RequestOptions options,
                                       ActionListener<AcknowledgedResponse> listener) {
-        performRequestAsyncAndParseEntity(putStoredScriptRequest, RequestConverters::putScript, options,
+        return performRequestAsyncAndParseEntity(putStoredScriptRequest, RequestConverters::putScript, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -1379,10 +1418,11 @@ public class RestHighLevelClient implements Closeable {
      * @param fieldCapabilitiesRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public final void fieldCapsAsync(FieldCapabilitiesRequest fieldCapabilitiesRequest, RequestOptions options,
+    public final Cancellable fieldCapsAsync(FieldCapabilitiesRequest fieldCapabilitiesRequest, RequestOptions options,
                                             ActionListener<FieldCapabilitiesResponse> listener) {
-        performRequestAsyncAndParseEntity(fieldCapabilitiesRequest, RequestConverters::fieldCaps, options,
+        return performRequestAsyncAndParseEntity(fieldCapabilitiesRequest, RequestConverters::fieldCaps, options,
             FieldCapabilitiesResponse::fromXContent, listener, emptySet());
     }
 
@@ -1514,26 +1554,28 @@ public class RestHighLevelClient implements Closeable {
     /**
      * @deprecated If creating a new HLRC ReST API call, consider creating new actions instead of reusing server actions. The Validation
      * layer has been added to the ReST client, and requests should extend {@link Validatable} instead of {@link ActionRequest}.
+     * @return Cancellable instance that may be used to cancel the request
      */
     @Deprecated
-    protected final <Req extends ActionRequest, Resp> void performRequestAsyncAndParseEntity(Req request,
+    protected final <Req extends ActionRequest, Resp> Cancellable performRequestAsyncAndParseEntity(Req request,
                 CheckedFunction<Req, Request, IOException> requestConverter,
                 RequestOptions options,
                 CheckedFunction<XContentParser, Resp, IOException> entityParser,
                 ActionListener<Resp> listener, Set<Integer> ignores) {
-        performRequestAsync(request, requestConverter, options,
+        return performRequestAsync(request, requestConverter, options,
                 response -> parseEntity(response.getEntity(), entityParser), listener, ignores);
     }
 
     /**
      * Defines a helper method for asynchronously performing a request.
+     * @return Cancellable instance that may be used to cancel the request
      */
-    protected final <Req extends Validatable, Resp> void performRequestAsyncAndParseEntity(Req request,
+    protected final <Req extends Validatable, Resp> Cancellable performRequestAsyncAndParseEntity(Req request,
                 CheckedFunction<Req, Request, IOException> requestConverter,
                 RequestOptions options,
                 CheckedFunction<XContentParser, Resp, IOException> entityParser,
                 ActionListener<Resp> listener, Set<Integer> ignores) {
-        performRequestAsync(request, requestConverter, options,
+        return performRequestAsync(request, requestConverter, options,
                 response -> parseEntity(response.getEntity(), entityParser), listener, ignores);
     }
 
@@ -1541,9 +1583,10 @@ public class RestHighLevelClient implements Closeable {
     /**
      * @deprecated If creating a new HLRC ReST API call, consider creating new actions instead of reusing server actions. The Validation
      * layer has been added to the ReST client, and requests should extend {@link Validatable} instead of {@link ActionRequest}.
+     * @return Cancellable instance that may be used to cancel the request
      */
     @Deprecated
-    protected final <Req extends ActionRequest, Resp> void performRequestAsync(Req request,
+    protected final <Req extends ActionRequest, Resp> Cancellable performRequestAsync(Req request,
                 CheckedFunction<Req, Request, IOException> requestConverter,
                 RequestOptions options,
                 CheckedFunction<Response, Resp, IOException> responseConverter,
@@ -1551,15 +1594,16 @@ public class RestHighLevelClient implements Closeable {
         ActionRequestValidationException validationException = request.validate();
         if (validationException != null && validationException.validationErrors().isEmpty() == false) {
             listener.onFailure(validationException);
-            return;
+            return Cancellable.NO_OP;
         }
-        internalPerformRequestAsync(request, requestConverter, options, responseConverter, listener, ignores);
+        return internalPerformRequestAsync(request, requestConverter, options, responseConverter, listener, ignores);
     }
 
     /**
      * Defines a helper method for asynchronously performing a request.
+     * @return Cancellable instance that may be used to cancel the request
      */
-    protected final <Req extends Validatable, Resp> void performRequestAsync(Req request,
+    protected final <Req extends Validatable, Resp> Cancellable performRequestAsync(Req request,
                 CheckedFunction<Req, Request, IOException> requestConverter,
                 RequestOptions options,
                 CheckedFunction<Response, Resp, IOException> responseConverter,
@@ -1567,15 +1611,16 @@ public class RestHighLevelClient implements Closeable {
         Optional<ValidationException> validationException = request.validate();
         if (validationException != null && validationException.isPresent()) {
             listener.onFailure(validationException.get());
-            return;
+            return Cancellable.NO_OP;
         }
-        internalPerformRequestAsync(request, requestConverter, options, responseConverter, listener, ignores);
+        return internalPerformRequestAsync(request, requestConverter, options, responseConverter, listener, ignores);
     }
 
     /**
      * Provides common functionality for asynchronously performing a request.
+     * @return Cancellable instance that may be used to cancel the request
      */
-    private <Req, Resp> void internalPerformRequestAsync(Req request,
+    private <Req, Resp> Cancellable internalPerformRequestAsync(Req request,
                  CheckedFunction<Req, Request, IOException> requestConverter,
                  RequestOptions options,
                  CheckedFunction<Response, Resp, IOException> responseConverter,
@@ -1585,12 +1630,12 @@ public class RestHighLevelClient implements Closeable {
             req = requestConverter.apply(request);
         } catch (Exception e) {
             listener.onFailure(e);
-            return;
+            return Cancellable.NO_OP;
         }
         req.setOptions(options);
 
         ResponseListener responseListener = wrapResponseListener(responseConverter, listener, ignores);
-        client.performRequestAsync(req, responseListener);
+        return client.performRequestAsync(req, responseListener);
     }
 
 
@@ -1634,8 +1679,9 @@ public class RestHighLevelClient implements Closeable {
 
     /**
      * Asynchronous request which returns empty {@link Optional}s in the case of 404s or parses entity into an Optional
+     * @return Cancellable instance that may be used to cancel the request
      */
-    protected final <Req extends Validatable, Resp> void performRequestAsyncAndParseOptionalEntity(Req request,
+    protected final <Req extends Validatable, Resp> Cancellable performRequestAsyncAndParseOptionalEntity(Req request,
               CheckedFunction<Req, Request, IOException> requestConverter,
               RequestOptions options,
               CheckedFunction<XContentParser, Resp, IOException> entityParser,
@@ -1643,19 +1689,19 @@ public class RestHighLevelClient implements Closeable {
         Optional<ValidationException> validationException = request.validate();
         if (validationException != null && validationException.isPresent()) {
             listener.onFailure(validationException.get());
-            return;
+            return Cancellable.NO_OP;
         }
         Request req;
         try {
             req = requestConverter.apply(request);
         } catch (Exception e) {
             listener.onFailure(e);
-            return;
+            return Cancellable.NO_OP;
         }
         req.setOptions(options);
         ResponseListener responseListener = wrapResponseListener404sOptional(response -> parseEntity(response.getEntity(),
                 entityParser), listener);
-        client.performRequestAsync(req, responseListener);
+        return client.performRequestAsync(req, responseListener);
     }
 
     final <Resp> ResponseListener wrapResponseListener404sOptional(CheckedFunction<Response, Resp, IOException> responseConverter,

client/rest-high-level/src/main/java/org/elasticsearch/client/RollupClient.java

@@ -30,8 +30,6 @@ import org.elasticsearch.client.rollup.GetRollupJobRequest;
 import org.elasticsearch.client.rollup.GetRollupJobResponse;
 import org.elasticsearch.client.rollup.GetRollupCapsRequest;
 import org.elasticsearch.client.rollup.GetRollupCapsResponse;
-import org.elasticsearch.client.rollup.GetRollupJobRequest;
-import org.elasticsearch.client.rollup.GetRollupJobResponse;
 import org.elasticsearch.client.rollup.PutRollupJobRequest;
 import org.elasticsearch.client.rollup.StartRollupJobRequest;
 import org.elasticsearch.client.rollup.StartRollupJobResponse;
@@ -80,9 +78,11 @@ public class RollupClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putRollupJobAsync(PutRollupJobRequest request, RequestOptions options, ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable putRollupJobAsync(PutRollupJobRequest request, RequestOptions options,
+                                         ActionListener<AcknowledgedResponse> listener) {
+       return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             RollupRequestConverters::putJob,
             options,
             AcknowledgedResponse::fromXContent,
@@ -113,10 +113,11 @@ public class RollupClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void startRollupJobAsync(StartRollupJobRequest request, RequestOptions options,
+    public Cancellable startRollupJobAsync(StartRollupJobRequest request, RequestOptions options,
                                            ActionListener<StartRollupJobResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             RollupRequestConverters::startJob,
             options,
             StartRollupJobResponse::fromXContent,
@@ -147,10 +148,11 @@ public class RollupClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void stopRollupJobAsync(StopRollupJobRequest request, RequestOptions options,
+    public Cancellable stopRollupJobAsync(StopRollupJobRequest request, RequestOptions options,
                                           ActionListener<StopRollupJobResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             RollupRequestConverters::stopJob,
             options,
             StopRollupJobResponse::fromXContent,
@@ -180,11 +182,12 @@ public class RollupClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteRollupJobAsync(DeleteRollupJobRequest request,
+    public Cancellable deleteRollupJobAsync(DeleteRollupJobRequest request,
                                             RequestOptions options,
                                             ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             RollupRequestConverters::deleteJob,
             options,
             AcknowledgedResponse::fromXContent,
@@ -215,11 +218,11 @@ public class RollupClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-
-
-    public void getRollupJobAsync(GetRollupJobRequest request, RequestOptions options, ActionListener<GetRollupJobResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+    public Cancellable getRollupJobAsync(GetRollupJobRequest request, RequestOptions options,
+                                         ActionListener<GetRollupJobResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             RollupRequestConverters::getJob,
             options,
             GetRollupJobResponse::fromXContent,
@@ -251,9 +254,10 @@ public class RollupClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void searchAsync(SearchRequest request, RequestOptions options, ActionListener<SearchResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+    public Cancellable searchAsync(SearchRequest request, RequestOptions options, ActionListener<SearchResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
                 request,
                 RollupRequestConverters::search,
                 options,
@@ -286,10 +290,11 @@ public class RollupClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getRollupCapabilitiesAsync(GetRollupCapsRequest request, RequestOptions options,
+    public Cancellable getRollupCapabilitiesAsync(GetRollupCapsRequest request, RequestOptions options,
                                                   ActionListener<GetRollupCapsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             RollupRequestConverters::getRollupCaps,
             options,
             GetRollupCapsResponse::fromXContent,
@@ -322,10 +327,11 @@ public class RollupClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getRollupIndexCapabilitiesAsync(GetRollupIndexCapsRequest request, RequestOptions options,
+    public Cancellable getRollupIndexCapabilitiesAsync(GetRollupIndexCapsRequest request, RequestOptions options,
                                                        ActionListener<GetRollupIndexCapsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
             RollupRequestConverters::getRollupIndexCaps,
             options,
             GetRollupIndexCapsResponse::fromXContent,

client/rest-high-level/src/main/java/org/elasticsearch/client/SecurityClient.java

@@ -113,9 +113,10 @@ public final class SecurityClient {
      * @param request the request with the user's name
      * @param options the request options (e.g., headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getUsersAsync(GetUsersRequest request, RequestOptions options, ActionListener<GetUsersResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::getUsers, options,
+    public Cancellable getUsersAsync(GetUsersRequest request, RequestOptions options, ActionListener<GetUsersResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::getUsers, options,
             GetUsersResponse::fromXContent, listener, emptySet());
     }
 
@@ -142,9 +143,10 @@ public final class SecurityClient {
      * @param request  the request with the user's information
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putUserAsync(PutUserRequest request, RequestOptions options, ActionListener<PutUserResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::putUser, options,
+    public Cancellable putUserAsync(PutUserRequest request, RequestOptions options, ActionListener<PutUserResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::putUser, options,
             PutUserResponse::fromXContent, listener, emptySet());
     }
 
@@ -169,9 +171,10 @@ public final class SecurityClient {
      * @param request the request with the user to delete
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteUserAsync(DeleteUserRequest request, RequestOptions options, ActionListener<DeleteUserResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::deleteUser, options,
+    public Cancellable deleteUserAsync(DeleteUserRequest request, RequestOptions options, ActionListener<DeleteUserResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::deleteUser, options,
             DeleteUserResponse::fromXContent, listener, singleton(404));
     }
 
@@ -196,10 +199,11 @@ public final class SecurityClient {
      * @param request the request with the role mapping information
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putRoleMappingAsync(final PutRoleMappingRequest request, final RequestOptions options,
+    public Cancellable putRoleMappingAsync(final PutRoleMappingRequest request, final RequestOptions options,
                                            final ActionListener<PutRoleMappingResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::putRoleMapping, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::putRoleMapping, options,
                 PutRoleMappingResponse::fromXContent, listener, emptySet());
     }
 
@@ -216,7 +220,8 @@ public final class SecurityClient {
      * @throws IOException in case there is a problem sending the request or
      * parsing back the response
      */
-    public GetRoleMappingsResponse getRoleMappings(final GetRoleMappingsRequest request, final RequestOptions options) throws IOException {
+    public GetRoleMappingsResponse getRoleMappings(final GetRoleMappingsRequest request,
+                                                   final RequestOptions options) throws IOException {
         return restHighLevelClient.performRequestAndParseEntity(request, SecurityRequestConverters::getRoleMappings,
             options, GetRoleMappingsResponse::fromXContent, emptySet());
     }
@@ -230,10 +235,11 @@ public final class SecurityClient {
      * If no role mapping name is provided then retrieves all role mappings.
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getRoleMappingsAsync(final GetRoleMappingsRequest request, final RequestOptions options,
+    public Cancellable getRoleMappingsAsync(final GetRoleMappingsRequest request, final RequestOptions options,
                                             final ActionListener<GetRoleMappingsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::getRoleMappings,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::getRoleMappings,
                 options, GetRoleMappingsResponse::fromXContent, listener, emptySet());
     }
 
@@ -276,10 +282,11 @@ public final class SecurityClient {
      * @param request  the request with the user to enable
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void enableUserAsync(EnableUserRequest request, RequestOptions options,
+    public Cancellable enableUserAsync(EnableUserRequest request, RequestOptions options,
                                        ActionListener<Boolean> listener) {
-        restHighLevelClient.performRequestAsync(request, SecurityRequestConverters::enableUser, options,
+        return restHighLevelClient.performRequestAsync(request, SecurityRequestConverters::enableUser, options,
             RestHighLevelClient::convertExistsResponse, listener, emptySet());
     }
 
@@ -292,11 +299,12 @@ public final class SecurityClient {
      * @param request  the request with the user to enable
      * @param listener the listener to be notified upon request completion
      * @deprecated use {@link #enableUserAsync(EnableUserRequest, RequestOptions, ActionListener)} instead
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void enableUserAsync(RequestOptions options, EnableUserRequest request,
+    public Cancellable enableUserAsync(RequestOptions options, EnableUserRequest request,
                                        ActionListener<Boolean> listener) {
-        enableUserAsync(request, options, listener);
+        return enableUserAsync(request, options, listener);
     }
 
     /**
@@ -338,10 +346,11 @@ public final class SecurityClient {
      * @param request  the request with the user to disable
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void disableUserAsync(DisableUserRequest request, RequestOptions options,
+    public Cancellable disableUserAsync(DisableUserRequest request, RequestOptions options,
                                         ActionListener<Boolean> listener) {
-        restHighLevelClient.performRequestAsync(request, SecurityRequestConverters::disableUser, options,
+        return restHighLevelClient.performRequestAsync(request, SecurityRequestConverters::disableUser, options,
             RestHighLevelClient::convertExistsResponse, listener, emptySet());
     }
 
@@ -354,11 +363,12 @@ public final class SecurityClient {
      * @param request  the request with the user to disable
      * @param listener the listener to be notified upon request completion
      * @deprecated use {@link #disableUserAsync(DisableUserRequest, RequestOptions, ActionListener)} instead
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void disableUserAsync(RequestOptions options, DisableUserRequest request,
+    public Cancellable disableUserAsync(RequestOptions options, DisableUserRequest request,
                                         ActionListener<Boolean> listener) {
-        disableUserAsync(request, options, listener);
+        return disableUserAsync(request, options, listener);
     }
 
     /**
@@ -381,9 +391,10 @@ public final class SecurityClient {
      *
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void authenticateAsync(RequestOptions options, ActionListener<AuthenticateResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(AuthenticateRequest.INSTANCE, AuthenticateRequest::getRequest, options,
+    public Cancellable authenticateAsync(RequestOptions options, ActionListener<AuthenticateResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(AuthenticateRequest.INSTANCE, AuthenticateRequest::getRequest, options,
                 AuthenticateResponse::fromXContent, listener, emptySet());
     }
 
@@ -405,13 +416,14 @@ public final class SecurityClient {
      * Asynchronously determine whether the current user has a specified list of privileges
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/security-api-has-privileges.html">
      * the docs</a> for more.
-     *
      * @param request the request with the privileges to check
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void hasPrivilegesAsync(HasPrivilegesRequest request, RequestOptions options, ActionListener<HasPrivilegesResponse> listener) {
-         restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::hasPrivileges, options,
+    public Cancellable hasPrivilegesAsync(HasPrivilegesRequest request, RequestOptions options,
+                                          ActionListener<HasPrivilegesResponse> listener) {
+         return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::hasPrivileges, options,
             HasPrivilegesResponse::fromXContent, listener, emptySet());
     }
 
@@ -428,9 +440,11 @@ public final class SecurityClient {
      * Asynchronously retrieve the set of effective privileges held by the current user.
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getUserPrivilegesAsync(RequestOptions options, ActionListener<GetUserPrivilegesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(GetUserPrivilegesRequest.INSTANCE, GetUserPrivilegesRequest::getRequest,
+    public Cancellable getUserPrivilegesAsync(RequestOptions options, ActionListener<GetUserPrivilegesResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
+            GetUserPrivilegesRequest.INSTANCE, GetUserPrivilegesRequest::getRequest,
             options, GetUserPrivilegesResponse::fromXContent, listener, emptySet());
     }
 
@@ -457,10 +471,11 @@ public final class SecurityClient {
      * @param request  the request with the realm names and usernames to clear the cache for
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void clearRealmCacheAsync(ClearRealmCacheRequest request, RequestOptions options,
+    public Cancellable clearRealmCacheAsync(ClearRealmCacheRequest request, RequestOptions options,
                                             ActionListener<ClearRealmCacheResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::clearRealmCache, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::clearRealmCache, options,
             ClearRealmCacheResponse::fromXContent, listener, emptySet());
     }
 
@@ -487,10 +502,11 @@ public final class SecurityClient {
      * @param request  the request with the roles for which the cache should be cleared.
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void clearRolesCacheAsync(ClearRolesCacheRequest request, RequestOptions options,
+    public Cancellable clearRolesCacheAsync(ClearRolesCacheRequest request, RequestOptions options,
                                             ActionListener<ClearRolesCacheResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::clearRolesCache, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::clearRolesCache, options,
             ClearRolesCacheResponse::fromXContent, listener, emptySet());
     }
 
@@ -515,9 +531,11 @@ public final class SecurityClient {
      *
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getSslCertificatesAsync(RequestOptions options, ActionListener<GetSslCertificatesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(GetSslCertificatesRequest.INSTANCE, GetSslCertificatesRequest::getRequest,
+    public Cancellable getSslCertificatesAsync(RequestOptions options, ActionListener<GetSslCertificatesResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
+            GetSslCertificatesRequest.INSTANCE, GetSslCertificatesRequest::getRequest,
             options, GetSslCertificatesResponse::fromXContent, listener, emptySet());
     }
 
@@ -560,10 +578,11 @@ public final class SecurityClient {
      * @param request  the request with the user's new password
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void changePasswordAsync(ChangePasswordRequest request, RequestOptions options,
+    public Cancellable changePasswordAsync(ChangePasswordRequest request, RequestOptions options,
                                            ActionListener<Boolean> listener) {
-        restHighLevelClient.performRequestAsync(request, SecurityRequestConverters::changePassword, options,
+        return restHighLevelClient.performRequestAsync(request, SecurityRequestConverters::changePassword, options,
             RestHighLevelClient::convertExistsResponse, listener, emptySet());
     }
 
@@ -576,11 +595,12 @@ public final class SecurityClient {
      * @param request  the request with the user's new password
      * @param listener the listener to be notified upon request completion
      * @deprecated use {@link #changePasswordAsync(ChangePasswordRequest, RequestOptions, ActionListener)} instead
+     * @return cancellable that may be used to cancel the request
      */
     @Deprecated
-    public void changePasswordAsync(RequestOptions options, ChangePasswordRequest request,
+    public Cancellable changePasswordAsync(RequestOptions options, ChangePasswordRequest request,
                                            ActionListener<Boolean> listener) {
-        changePasswordAsync(request, options, listener);
+        return changePasswordAsync(request, options, listener);
     }
 
     /**
@@ -605,9 +625,10 @@ public final class SecurityClient {
      * @param request  the request with the roles to get
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getRolesAsync(GetRolesRequest request, RequestOptions options, ActionListener<GetRolesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::getRoles, options,
+    public Cancellable getRolesAsync(GetRolesRequest request, RequestOptions options, ActionListener<GetRolesResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::getRoles, options,
             GetRolesResponse::fromXContent, listener, emptySet());
     }
 
@@ -634,9 +655,10 @@ public final class SecurityClient {
      * @param request  the request containing the role to create or update
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putRoleAsync(PutRoleRequest request, RequestOptions options, ActionListener<PutRoleResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::putRole, options,
+    public Cancellable putRoleAsync(PutRoleRequest request, RequestOptions options, ActionListener<PutRoleResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::putRole, options,
                 PutRoleResponse::fromXContent, listener, emptySet());
     }
 
@@ -662,10 +684,12 @@ public final class SecurityClient {
      * @param request the request with the role mapping name to be deleted.
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteRoleMappingAsync(DeleteRoleMappingRequest request, RequestOptions options,
+    public Cancellable deleteRoleMappingAsync(DeleteRoleMappingRequest request, RequestOptions options,
                                               ActionListener<DeleteRoleMappingResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::deleteRoleMapping, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request,
+            SecurityRequestConverters::deleteRoleMapping, options,
                 DeleteRoleMappingResponse::fromXContent, listener, emptySet());
     }
 
@@ -690,9 +714,11 @@ public final class SecurityClient {
      * @param request the request with the role to delete
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteRoleAsync(DeleteRoleRequest request, RequestOptions options, ActionListener<DeleteRoleResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::deleteRole, options,
+    public Cancellable deleteRoleAsync(DeleteRoleRequest request, RequestOptions options,
+                                       ActionListener<DeleteRoleResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::deleteRole, options,
             DeleteRoleResponse::fromXContent, listener, singleton(404));
     }
 
@@ -719,9 +745,11 @@ public final class SecurityClient {
      * @param request the request for the token
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void createTokenAsync(CreateTokenRequest request, RequestOptions options, ActionListener<CreateTokenResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::createToken, options,
+    public Cancellable createTokenAsync(CreateTokenRequest request, RequestOptions options,
+                                        ActionListener<CreateTokenResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::createToken, options,
             CreateTokenResponse::fromXContent, listener, emptySet());
     }
 
@@ -744,14 +772,14 @@ public final class SecurityClient {
      * Asynchronously invalidates an OAuth2 token.
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/security-api-invalidate-token.html">
      * the docs</a> for more.
-     *
      * @param request the request to invalidate the token
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void invalidateTokenAsync(InvalidateTokenRequest request, RequestOptions options,
+    public Cancellable invalidateTokenAsync(InvalidateTokenRequest request, RequestOptions options,
                                             ActionListener<InvalidateTokenResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::invalidateToken, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::invalidateToken, options,
             InvalidateTokenResponse::fromXContent, listener, emptySet());
     }
 
@@ -777,10 +805,13 @@ public final class SecurityClient {
      *
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getBuiltinPrivilegesAsync(final RequestOptions options, final ActionListener<GetBuiltinPrivilegesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(GetBuiltinPrivilegesRequest.INSTANCE,
-            GetBuiltinPrivilegesRequest::getRequest, options, GetBuiltinPrivilegesResponse::fromXContent, listener, emptySet());
+    public Cancellable getBuiltinPrivilegesAsync(final RequestOptions options,
+                                                 final ActionListener<GetBuiltinPrivilegesResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(GetBuiltinPrivilegesRequest.INSTANCE,
+            GetBuiltinPrivilegesRequest::getRequest, options, GetBuiltinPrivilegesResponse::fromXContent,
+            listener, emptySet());
     }
 
     /**
@@ -806,16 +837,16 @@ public final class SecurityClient {
      * Asynchronously get application privilege(s).
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/security-api-get-privileges.html">
      * the docs</a> for more.
-     *
      *  @param request  {@link GetPrivilegesRequest} with the application name and the privilege name.
      *                 If no application name is provided, information about all privileges for all applications is retrieved.
      *                 If no privilege name is provided, information about all privileges of the specified application is retrieved.
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getPrivilegesAsync(final GetPrivilegesRequest request, final RequestOptions options,
+    public Cancellable getPrivilegesAsync(final GetPrivilegesRequest request, final RequestOptions options,
                                           final ActionListener<GetPrivilegesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::getPrivileges,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::getPrivileges,
             options, GetPrivilegesResponse::fromXContent, listener, emptySet());
     }
 
@@ -844,10 +875,11 @@ public final class SecurityClient {
      * @param options the request options (e.g. headers), use
      * {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putPrivilegesAsync(final PutPrivilegesRequest request, final RequestOptions options,
+    public Cancellable putPrivilegesAsync(final PutPrivilegesRequest request, final RequestOptions options,
                                           final ActionListener<PutPrivilegesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::putPrivileges, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::putPrivileges, options,
                 PutPrivilegesResponse::fromXContent, listener, emptySet());
     }
 
@@ -874,10 +906,11 @@ public final class SecurityClient {
      * @param request  the request with the application privilege to delete
      * @param options  the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deletePrivilegesAsync(DeletePrivilegesRequest request, RequestOptions options,
+    public Cancellable deletePrivilegesAsync(DeletePrivilegesRequest request, RequestOptions options,
                                              ActionListener<DeletePrivilegesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::deletePrivileges, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::deletePrivileges, options,
             DeletePrivilegesResponse::fromXContent, listener, singleton(404));
     }
 
@@ -904,10 +937,11 @@ public final class SecurityClient {
      * @param request the request to create a API key
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void createApiKeyAsync(final CreateApiKeyRequest request, final RequestOptions options,
+    public Cancellable createApiKeyAsync(final CreateApiKeyRequest request, final RequestOptions options,
                                          final ActionListener<CreateApiKeyResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::createApiKey, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::createApiKey, options,
                 CreateApiKeyResponse::fromXContent, listener, emptySet());
     }
 
@@ -934,10 +968,11 @@ public final class SecurityClient {
      * @param request the request to retrieve API key(s)
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getApiKeyAsync(final GetApiKeyRequest request, final RequestOptions options,
+    public Cancellable getApiKeyAsync(final GetApiKeyRequest request, final RequestOptions options,
                                       final ActionListener<GetApiKeyResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::getApiKey, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::getApiKey, options,
                 GetApiKeyResponse::fromXContent, listener, emptySet());
     }
 
@@ -965,10 +1000,11 @@ public final class SecurityClient {
      * @param request the request to invalidate API key(s)
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void invalidateApiKeyAsync(final InvalidateApiKeyRequest request, final RequestOptions options,
+    public Cancellable invalidateApiKeyAsync(final InvalidateApiKeyRequest request, final RequestOptions options,
                                              final ActionListener<InvalidateApiKeyResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::invalidateApiKey, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::invalidateApiKey, options,
                 InvalidateApiKeyResponse::fromXContent, listener, emptySet());
     }
 
@@ -1000,9 +1036,9 @@ public final class SecurityClient {
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
      */
-    public void delegatePkiAuthenticationAsync(DelegatePkiAuthenticationRequest request, RequestOptions options,
+    public Cancellable delegatePkiAuthenticationAsync(DelegatePkiAuthenticationRequest request, RequestOptions options,
             ActionListener<DelegatePkiAuthenticationResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::delegatePkiAuthentication, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, SecurityRequestConverters::delegatePkiAuthentication, options,
                 DelegatePkiAuthenticationResponse::fromXContent, listener, emptySet());
     }
 }

client/rest-high-level/src/main/java/org/elasticsearch/client/SnapshotClient.java

@@ -79,10 +79,12 @@ public final class SnapshotClient {
      * @param getRepositoriesRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getRepositoryAsync(GetRepositoriesRequest getRepositoriesRequest, RequestOptions options,
+    public Cancellable getRepositoryAsync(GetRepositoriesRequest getRepositoriesRequest, RequestOptions options,
                                           ActionListener<GetRepositoriesResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getRepositoriesRequest, SnapshotRequestConverters::getRepositories, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(getRepositoriesRequest,
+            SnapshotRequestConverters::getRepositories, options,
             GetRepositoriesResponse::fromXContent, listener, emptySet());
     }
 
@@ -107,10 +109,12 @@ public final class SnapshotClient {
      * @param putRepositoryRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void createRepositoryAsync(PutRepositoryRequest putRepositoryRequest, RequestOptions options,
+    public Cancellable createRepositoryAsync(PutRepositoryRequest putRepositoryRequest, RequestOptions options,
                                              ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(putRepositoryRequest, SnapshotRequestConverters::createRepository, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(putRepositoryRequest,
+            SnapshotRequestConverters::createRepository, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -136,10 +140,12 @@ public final class SnapshotClient {
      * @param deleteRepositoryRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteRepositoryAsync(DeleteRepositoryRequest deleteRepositoryRequest, RequestOptions options,
+    public Cancellable deleteRepositoryAsync(DeleteRepositoryRequest deleteRepositoryRequest, RequestOptions options,
                                              ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(deleteRepositoryRequest, SnapshotRequestConverters::deleteRepository, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(deleteRepositoryRequest,
+            SnapshotRequestConverters::deleteRepository, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -165,10 +171,12 @@ public final class SnapshotClient {
      * @param verifyRepositoryRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void verifyRepositoryAsync(VerifyRepositoryRequest verifyRepositoryRequest, RequestOptions options,
+    public Cancellable verifyRepositoryAsync(VerifyRepositoryRequest verifyRepositoryRequest, RequestOptions options,
                                              ActionListener<VerifyRepositoryResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(verifyRepositoryRequest, SnapshotRequestConverters::verifyRepository, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(verifyRepositoryRequest,
+            SnapshotRequestConverters::verifyRepository, options,
             VerifyRepositoryResponse::fromXContent, listener, emptySet());
     }
 
@@ -194,10 +202,11 @@ public final class SnapshotClient {
      * @param cleanupRepositoryRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void cleanupRepositoryAsync(CleanupRepositoryRequest cleanupRepositoryRequest, RequestOptions options,
+    public Cancellable cleanupRepositoryAsync(CleanupRepositoryRequest cleanupRepositoryRequest, RequestOptions options,
                                        ActionListener<CleanupRepositoryResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(cleanupRepositoryRequest, SnapshotRequestConverters::cleanupRepository,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(cleanupRepositoryRequest, SnapshotRequestConverters::cleanupRepository,
             options, CleanupRepositoryResponse::fromXContent, listener, emptySet());
     }
 
@@ -218,10 +227,12 @@ public final class SnapshotClient {
      * <p>
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-snapshots.html"> Snapshot and Restore
      * API on elastic.co</a>
+     * @return cancellable that may be used to cancel the request
      */
-    public void createAsync(CreateSnapshotRequest createSnapshotRequest, RequestOptions options,
+    public Cancellable createAsync(CreateSnapshotRequest createSnapshotRequest, RequestOptions options,
                                    ActionListener<CreateSnapshotResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(createSnapshotRequest, SnapshotRequestConverters::createSnapshot, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(createSnapshotRequest,
+            SnapshotRequestConverters::createSnapshot, options,
             CreateSnapshotResponse::fromXContent, listener, emptySet());
     }
 
@@ -244,13 +255,15 @@ public final class SnapshotClient {
      * Asynchronously get snapshots.
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-snapshots.html"> Snapshot and Restore
      * API on elastic.co</a>
-     *
      *  @param getSnapshotsRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getAsync(GetSnapshotsRequest getSnapshotsRequest, RequestOptions options, ActionListener<GetSnapshotsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(getSnapshotsRequest, SnapshotRequestConverters::getSnapshots, options,
+    public Cancellable getAsync(GetSnapshotsRequest getSnapshotsRequest, RequestOptions options,
+                                ActionListener<GetSnapshotsResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(getSnapshotsRequest,
+            SnapshotRequestConverters::getSnapshots, options,
             GetSnapshotsResponse::fromXContent, listener, emptySet());
     }
 
@@ -276,10 +289,12 @@ public final class SnapshotClient {
      * @param snapshotsStatusRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void statusAsync(SnapshotsStatusRequest snapshotsStatusRequest, RequestOptions options,
+    public Cancellable statusAsync(SnapshotsStatusRequest snapshotsStatusRequest, RequestOptions options,
                                    ActionListener<SnapshotsStatusResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(snapshotsStatusRequest, SnapshotRequestConverters::snapshotsStatus, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(snapshotsStatusRequest,
+            SnapshotRequestConverters::snapshotsStatus, options,
             SnapshotsStatusResponse::fromXContent, listener, emptySet());
     }
 
@@ -306,10 +321,12 @@ public final class SnapshotClient {
      * @param restoreSnapshotRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void restoreAsync(RestoreSnapshotRequest restoreSnapshotRequest, RequestOptions options,
+    public Cancellable restoreAsync(RestoreSnapshotRequest restoreSnapshotRequest, RequestOptions options,
                                     ActionListener<RestoreSnapshotResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(restoreSnapshotRequest, SnapshotRequestConverters::restoreSnapshot, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(restoreSnapshotRequest,
+            SnapshotRequestConverters::restoreSnapshot, options,
             RestoreSnapshotResponse::fromXContent, listener, emptySet());
     }
 
@@ -324,7 +341,8 @@ public final class SnapshotClient {
      * @throws IOException in case there is a problem sending the request or parsing back the response
      */
     public AcknowledgedResponse delete(DeleteSnapshotRequest deleteSnapshotRequest, RequestOptions options) throws IOException {
-        return restHighLevelClient.performRequestAndParseEntity(deleteSnapshotRequest, SnapshotRequestConverters::deleteSnapshot, options,
+        return restHighLevelClient.performRequestAndParseEntity(deleteSnapshotRequest,
+            SnapshotRequestConverters::deleteSnapshot, options,
             AcknowledgedResponse::fromXContent, emptySet());
     }
 
@@ -336,10 +354,12 @@ public final class SnapshotClient {
      * @param deleteSnapshotRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteAsync(DeleteSnapshotRequest deleteSnapshotRequest, RequestOptions options,
+    public Cancellable deleteAsync(DeleteSnapshotRequest deleteSnapshotRequest, RequestOptions options,
                                    ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(deleteSnapshotRequest, SnapshotRequestConverters::deleteSnapshot, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(deleteSnapshotRequest,
+            SnapshotRequestConverters::deleteSnapshot, options,
             AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 }

client/rest-high-level/src/main/java/org/elasticsearch/client/TasksClient.java

@@ -65,9 +65,10 @@ public final class TasksClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void listAsync(ListTasksRequest request, RequestOptions options, ActionListener<ListTasksResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, TasksRequestConverters::listTasks, options,
+    public Cancellable listAsync(ListTasksRequest request, RequestOptions options, ActionListener<ListTasksResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, TasksRequestConverters::listTasks, options,
                 ListTasksResponse::fromXContent, listener, emptySet());
     }
 
@@ -92,10 +93,12 @@ public final class TasksClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener an actionlistener that takes an optional response (404s are returned as an empty Optional)
+     * @return cancellable that may be used to cancel the request
      */
-    public void getAsync(GetTaskRequest request, RequestOptions options, ActionListener<Optional<GetTaskResponse>> listener) {
+    public Cancellable getAsync(GetTaskRequest request, RequestOptions options,
+                                ActionListener<Optional<GetTaskResponse>> listener) {
 
-        restHighLevelClient.performRequestAsyncAndParseOptionalEntity(request, TasksRequestConverters::getTask, options,
+        return restHighLevelClient.performRequestAsyncAndParseOptionalEntity(request, TasksRequestConverters::getTask, options,
                 GetTaskResponse::fromXContent, listener);
     }
 
@@ -128,9 +131,11 @@ public final class TasksClient {
      * @param cancelTasksRequest the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void cancelAsync(CancelTasksRequest cancelTasksRequest, RequestOptions options, ActionListener<CancelTasksResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+    public Cancellable cancelAsync(CancelTasksRequest cancelTasksRequest, RequestOptions options,
+                                   ActionListener<CancelTasksResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
             cancelTasksRequest,
             TasksRequestConverters::cancelTasks,
             options,

client/rest-high-level/src/main/java/org/elasticsearch/client/WatcherClient.java

@@ -71,10 +71,11 @@ public final class WatcherClient {
      * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/watcher-api-start.html">
      * the docs</a> for more.
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
+     * @return cancellable that may be used to cancel the request
      */
-    public void startWatchServiceAsync(StartWatchServiceRequest request, RequestOptions options,
+    public Cancellable startWatchServiceAsync(StartWatchServiceRequest request, RequestOptions options,
                                               ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
                 request, WatcherRequestConverters::startWatchService, options, AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -98,10 +99,11 @@ public final class WatcherClient {
      * the docs</a> for more.
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
+     * @return cancellable that may be used to cancel the request
      */
-    public void stopWatchServiceAsync(StopWatchServiceRequest request, RequestOptions options,
+    public Cancellable stopWatchServiceAsync(StopWatchServiceRequest request, RequestOptions options,
                                              ActionListener<AcknowledgedResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(
+        return restHighLevelClient.performRequestAsyncAndParseEntity(
                 request, WatcherRequestConverters::stopWatchService, options, AcknowledgedResponse::fromXContent, listener, emptySet());
     }
 
@@ -126,10 +128,11 @@ public final class WatcherClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void putWatchAsync(PutWatchRequest request, RequestOptions options,
+    public Cancellable putWatchAsync(PutWatchRequest request, RequestOptions options,
                                      ActionListener<PutWatchResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::putWatch, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::putWatch, options,
             PutWatchResponse::fromXContent, listener, emptySet());
     }
 
@@ -154,10 +157,11 @@ public final class WatcherClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void getWatchAsync(GetWatchRequest request, RequestOptions options,
+    public Cancellable getWatchAsync(GetWatchRequest request, RequestOptions options,
                                      ActionListener<GetWatchResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::getWatch, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::getWatch, options,
             GetWatchResponse::fromXContent, listener, emptySet());
     }
 
@@ -183,10 +187,11 @@ public final class WatcherClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deactivateWatchAsync(DeactivateWatchRequest request, RequestOptions options,
+    public Cancellable deactivateWatchAsync(DeactivateWatchRequest request, RequestOptions options,
                                             ActionListener<DeactivateWatchResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::deactivateWatch, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::deactivateWatch, options,
             DeactivateWatchResponse::fromXContent, listener, emptySet());
     }
 
@@ -211,9 +216,10 @@ public final class WatcherClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void deleteWatchAsync(DeleteWatchRequest request, RequestOptions options, ActionListener<DeleteWatchResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::deleteWatch, options,
+    public Cancellable deleteWatchAsync(DeleteWatchRequest request, RequestOptions options, ActionListener<DeleteWatchResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::deleteWatch, options,
             DeleteWatchResponse::fromXContent, listener, singleton(404));
     }
 
@@ -238,9 +244,10 @@ public final class WatcherClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon completion of the request
+     * @return cancellable that may be used to cancel the request
      */
-    public void ackWatchAsync(AckWatchRequest request, RequestOptions options, ActionListener<AckWatchResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::ackWatch, options,
+    public Cancellable ackWatchAsync(AckWatchRequest request, RequestOptions options, ActionListener<AckWatchResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::ackWatch, options,
             AckWatchResponse::fromXContent, listener, emptySet());
     }
 
@@ -265,9 +272,11 @@ public final class WatcherClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void activateWatchAsync(ActivateWatchRequest request, RequestOptions options, ActionListener<ActivateWatchResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::activateWatch, options,
+    public Cancellable activateWatchAsync(ActivateWatchRequest request, RequestOptions options,
+                                          ActionListener<ActivateWatchResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::activateWatch, options,
             ActivateWatchResponse::fromXContent, listener, singleton(404));
     }
 
@@ -292,9 +301,11 @@ public final class WatcherClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notifed upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void executeWatchAsync(ExecuteWatchRequest request, RequestOptions options, ActionListener<ExecuteWatchResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::executeWatch, options,
+    public Cancellable executeWatchAsync(ExecuteWatchRequest request, RequestOptions options,
+                                         ActionListener<ExecuteWatchResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::executeWatch, options,
             ExecuteWatchResponse::fromXContent, listener, emptySet());
     }
 
@@ -319,9 +330,11 @@ public final class WatcherClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void watcherStatsAsync(WatcherStatsRequest request, RequestOptions options, ActionListener<WatcherStatsResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::watcherStats, options,
+    public Cancellable watcherStatsAsync(WatcherStatsRequest request, RequestOptions options,
+                                         ActionListener<WatcherStatsResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, WatcherRequestConverters::watcherStats, options,
             WatcherStatsResponse::fromXContent, listener, emptySet());
     }
 

client/rest-high-level/src/main/java/org/elasticsearch/client/XPackClient.java

@@ -67,10 +67,11 @@ public final class XPackClient {
      * @param request the request
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void infoAsync(XPackInfoRequest request, RequestOptions options,
+    public Cancellable infoAsync(XPackInfoRequest request, RequestOptions options,
                                  ActionListener<XPackInfoResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, XPackRequestConverters::info, options,
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, XPackRequestConverters::info, options,
             XPackInfoResponse::fromXContent, listener, emptySet());
     }
 
@@ -89,9 +90,10 @@ public final class XPackClient {
      * Asynchronously fetch usage information about X-Pack features from the cluster.
      * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
      * @param listener the listener to be notified upon request completion
+     * @return cancellable that may be used to cancel the request
      */
-    public void usageAsync(XPackUsageRequest request, RequestOptions options, ActionListener<XPackUsageResponse> listener) {
-        restHighLevelClient.performRequestAsyncAndParseEntity(request, XPackRequestConverters::usage, options,
+    public Cancellable usageAsync(XPackUsageRequest request, RequestOptions options, ActionListener<XPackUsageResponse> listener) {
+        return restHighLevelClient.performRequestAsyncAndParseEntity(request, XPackRequestConverters::usage, options,
             XPackUsageResponse::fromXContent, listener, emptySet());
     }
 }

client/rest-high-level/src/main/java/org/elasticsearch/client/core/CountRequest.java

@@ -24,8 +24,13 @@ import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.IndicesRequest;
 import org.elasticsearch.action.support.IndicesOptions;
 import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.xcontent.ToXContentObject;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.index.query.QueryBuilder;
 import org.elasticsearch.search.builder.SearchSourceBuilder;
+import org.elasticsearch.search.internal.SearchContext;
 
+import java.io.IOException;
 import java.util.Arrays;
 import java.util.Objects;
 
@@ -34,32 +39,43 @@ import static org.elasticsearch.action.search.SearchRequest.DEFAULT_INDICES_OPTI
 /**
  * Encapsulates a request to _count API against one, several or all indices.
  */
-public final class CountRequest extends ActionRequest implements IndicesRequest.Replaceable {
+public final class CountRequest extends ActionRequest implements IndicesRequest.Replaceable, ToXContentObject {
 
     private String[] indices = Strings.EMPTY_ARRAY;
     private String[] types = Strings.EMPTY_ARRAY;
     private String routing;
     private String preference;
-    private SearchSourceBuilder searchSourceBuilder;
+    private QueryBuilder query;
     private IndicesOptions indicesOptions = DEFAULT_INDICES_OPTIONS;
+    private int terminateAfter = SearchContext.DEFAULT_TERMINATE_AFTER;
+    private Float minScore;
 
-    public CountRequest() {
-        this.searchSourceBuilder = new SearchSourceBuilder();
-    }
+    public CountRequest() {}
 
     /**
      * Constructs a new count request against the indices. No indices provided here means that count will execute on all indices.
      */
     public CountRequest(String... indices) {
-        this(indices, new SearchSourceBuilder());
+        indices(indices);
     }
 
     /**
      * Constructs a new search request against the provided indices with the given search source.
+     *
+     * @deprecated The count api only supports a query. Use {@link #CountRequest(String[], QueryBuilder)} instead.
      */
+    @Deprecated
     public CountRequest(String[] indices, SearchSourceBuilder searchSourceBuilder) {
         indices(indices);
-        this.searchSourceBuilder = searchSourceBuilder;
+        this.query = Objects.requireNonNull(searchSourceBuilder, "source must not be null").query();
+    }
+
+    /**
+     * Constructs a new search request against the provided indices with the given query.
+     */
+    public CountRequest(String[] indices, QueryBuilder query) {
+        indices(indices);
+        this.query = Objects.requireNonNull(query, "query must not be null");;
     }
 
     @Override
@@ -81,9 +97,20 @@ public final class CountRequest extends ActionRequest implements IndicesRequest.
 
     /**
      * The source of the count request.
+     *
+     * @deprecated The count api only supports a query. Use {@link #query(QueryBuilder)} instead.
      */
+    @Deprecated
     public CountRequest source(SearchSourceBuilder searchSourceBuilder) {
-        this.searchSourceBuilder = Objects.requireNonNull(searchSourceBuilder, "source must not be null");
+        this.query = Objects.requireNonNull(searchSourceBuilder, "source must not be null").query();
+        return this;
+    }
+
+    /**
+     * Sets the query to execute for this count request.
+     */
+    public CountRequest query(QueryBuilder query) {
+        this.query = Objects.requireNonNull(query, "query must not be null");
         return this;
     }
 
@@ -156,20 +183,23 @@ public final class CountRequest extends ActionRequest implements IndicesRequest.
     }
 
     public Float minScore() {
-        return this.searchSourceBuilder.minScore();
+        return minScore;
     }
 
     public CountRequest minScore(Float minScore) {
-        this.searchSourceBuilder.minScore(minScore);
+        this.minScore = minScore;
         return this;
     }
 
     public int terminateAfter() {
-        return this.searchSourceBuilder.terminateAfter();
+        return this.terminateAfter;
     }
 
     public CountRequest terminateAfter(int terminateAfter) {
-        this.searchSourceBuilder.terminateAfter(terminateAfter);
+        if (terminateAfter < 0) {
+            throw new IllegalArgumentException("terminateAfter must be > 0");
+        }
+        this.terminateAfter = terminateAfter;
         return this;
     }
 
@@ -182,8 +212,31 @@ public final class CountRequest extends ActionRequest implements IndicesRequest.
         return Arrays.copyOf(this.types, this.types.length);
     }
 
+    /**
+     * @return the source builder
+     * @deprecated The count api only supports a query. Use {@link #query()} instead.
+     */
+    @Deprecated
     public SearchSourceBuilder source() {
-        return this.searchSourceBuilder;
+        return new SearchSourceBuilder().query(query);
+    }
+
+    /**
+     * @return The provided query to execute with the count request or
+     * <code>null</code> if no query was provided.
+     */
+    public QueryBuilder query() {
+        return query;
+    }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject();
+        if (query != null) {
+            builder.field("query", query);
+        }
+        builder.endObject();
+        return builder;
     }
 
     @Override
@@ -199,12 +252,15 @@ public final class CountRequest extends ActionRequest implements IndicesRequest.
             Arrays.equals(indices, that.indices) &&
             Arrays.equals(types, that.types) &&
             Objects.equals(routing, that.routing) &&
-            Objects.equals(preference, that.preference);
+            Objects.equals(preference, that.preference) &&
+            Objects.equals(terminateAfter, that.terminateAfter) &&
+            Objects.equals(minScore, that.minScore) &&
+            Objects.equals(query, that.query);
     }
 
     @Override
     public int hashCode() {
-        int result = Objects.hash(indicesOptions, routing, preference);
+        int result = Objects.hash(indicesOptions, routing, preference, terminateAfter, minScore, query);
         result = 31 * result + Arrays.hashCode(indices);
         result = 31 * result + Arrays.hashCode(types);
         return result;

client/rest-high-level/src/main/java/org/elasticsearch/client/ml/GetDataFrameAnalyticsStatsResponse.java

@@ -21,8 +21,8 @@ package org.elasticsearch.client.ml;
 
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.TaskOperationFailure;
-import org.elasticsearch.client.dataframe.AcknowledgedTasksResponse;
 import org.elasticsearch.client.ml.dataframe.DataFrameAnalyticsStats;
+import org.elasticsearch.client.transform.AcknowledgedTasksResponse;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/ml/dataframe/DataFrameAnalyticsConfig.java

@@ -20,7 +20,7 @@
 package org.elasticsearch.client.ml.dataframe;
 
 import org.elasticsearch.Version;
-import org.elasticsearch.client.dataframe.transforms.util.TimeUtil;
+import org.elasticsearch.client.transform.transforms.util.TimeUtil;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.Strings;

client/rest-high-level/src/main/java/org/elasticsearch/client/slm/GetSnapshotLifecycleStatsRequest.java

@@ -0,0 +1,30 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.client.slm;
+
+import org.elasticsearch.client.TimedRequest;
+
+public class GetSnapshotLifecycleStatsRequest extends TimedRequest {
+
+    public GetSnapshotLifecycleStatsRequest() {
+        super();
+    }
+
+}

client/rest-high-level/src/main/java/org/elasticsearch/client/slm/GetSnapshotLifecycleStatsResponse.java

@@ -0,0 +1,68 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.client.slm;
+
+import org.elasticsearch.common.xcontent.ToXContentObject;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
+
+import java.io.IOException;
+import java.util.Objects;
+
+public class GetSnapshotLifecycleStatsResponse implements ToXContentObject {
+
+    private final SnapshotLifecycleStats stats;
+
+    public GetSnapshotLifecycleStatsResponse(SnapshotLifecycleStats stats) {
+        this.stats = stats;
+    }
+
+    public SnapshotLifecycleStats getStats() {
+        return this.stats;
+    }
+
+    public static GetSnapshotLifecycleStatsResponse fromXContent(XContentParser parser) throws IOException {
+        return new GetSnapshotLifecycleStatsResponse(SnapshotLifecycleStats.parse(parser));
+    }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        return stats.toXContent(builder, params);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+
+        GetSnapshotLifecycleStatsResponse other = (GetSnapshotLifecycleStatsResponse) o;
+        return Objects.equals(this.stats, other.stats);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(this.stats);
+    }
+}

client/rest-high-level/src/main/java/org/elasticsearch/client/slm/SnapshotLifecyclePolicy.java

@@ -38,11 +38,13 @@ public class SnapshotLifecyclePolicy implements ToXContentObject {
     private final String schedule;
     private final String repository;
     private final Map<String, Object> configuration;
+    private final SnapshotRetentionConfiguration retentionPolicy;
 
     private static final ParseField NAME = new ParseField("name");
     private static final ParseField SCHEDULE = new ParseField("schedule");
     private static final ParseField REPOSITORY = new ParseField("repository");
     private static final ParseField CONFIG = new ParseField("config");
+    private static final ParseField RETENTION = new ParseField("retention");
 
     @SuppressWarnings("unchecked")
     private static final ConstructingObjectParser<SnapshotLifecyclePolicy, String> PARSER =
@@ -52,7 +54,8 @@ public class SnapshotLifecyclePolicy implements ToXContentObject {
                 String schedule = (String) a[1];
                 String repo = (String) a[2];
                 Map<String, Object> config = (Map<String, Object>) a[3];
-                return new SnapshotLifecyclePolicy(id, name, schedule, repo, config);
+                SnapshotRetentionConfiguration retention = (SnapshotRetentionConfiguration) a[4];
+                return new SnapshotLifecyclePolicy(id, name, schedule, repo, config, retention);
             });
 
     static {
@@ -60,15 +63,18 @@ public class SnapshotLifecyclePolicy implements ToXContentObject {
         PARSER.declareString(ConstructingObjectParser.constructorArg(), SCHEDULE);
         PARSER.declareString(ConstructingObjectParser.constructorArg(), REPOSITORY);
         PARSER.declareObject(ConstructingObjectParser.optionalConstructorArg(), (p, c) -> p.map(), CONFIG);
+        PARSER.declareObject(ConstructingObjectParser.optionalConstructorArg(), SnapshotRetentionConfiguration::parse, RETENTION);
     }
 
     public SnapshotLifecyclePolicy(final String id, final String name, final String schedule,
-                                   final String repository, @Nullable Map<String, Object> configuration) {
-        this.id = Objects.requireNonNull(id);
-        this.name = name;
-        this.schedule = schedule;
-        this.repository = repository;
+                                   final String repository, @Nullable final Map<String, Object> configuration,
+                                   @Nullable final SnapshotRetentionConfiguration retentionPolicy) {
+        this.id = Objects.requireNonNull(id, "policy id is required");
+        this.name = Objects.requireNonNull(name, "policy snapshot name is required");
+        this.schedule = Objects.requireNonNull(schedule, "policy schedule is required");
+        this.repository = Objects.requireNonNull(repository, "policy snapshot repository is required");
         this.configuration = configuration;
+        this.retentionPolicy = retentionPolicy;
     }
 
     public String getId() {
@@ -92,6 +98,11 @@ public class SnapshotLifecyclePolicy implements ToXContentObject {
         return this.configuration;
     }
 
+    @Nullable
+    public SnapshotRetentionConfiguration getRetentionPolicy() {
+        return this.retentionPolicy;
+    }
+
     public static SnapshotLifecyclePolicy parse(XContentParser parser, String id) {
         return PARSER.apply(parser, id);
     }
@@ -105,13 +116,16 @@ public class SnapshotLifecyclePolicy implements ToXContentObject {
         if (this.configuration != null) {
             builder.field(CONFIG.getPreferredName(), this.configuration);
         }
+        if (this.retentionPolicy != null) {
+            builder.field(RETENTION.getPreferredName(), this.retentionPolicy);
+        }
         builder.endObject();
         return builder;
     }
 
     @Override
     public int hashCode() {
-        return Objects.hash(id, name, schedule, repository, configuration);
+        return Objects.hash(id, name, schedule, repository, configuration, retentionPolicy);
     }
 
     @Override
@@ -128,7 +142,8 @@ public class SnapshotLifecyclePolicy implements ToXContentObject {
             Objects.equals(name, other.name) &&
             Objects.equals(schedule, other.schedule) &&
             Objects.equals(repository, other.repository) &&
-            Objects.equals(configuration, other.configuration);
+            Objects.equals(configuration, other.configuration) &&
+            Objects.equals(retentionPolicy, other.retentionPolicy);
     }
 
     @Override

client/rest-high-level/src/main/java/org/elasticsearch/client/slm/SnapshotLifecyclePolicyMetadata.java

@@ -42,6 +42,7 @@ public class SnapshotLifecyclePolicyMetadata implements ToXContentObject {
     static final ParseField NEXT_EXECUTION_MILLIS = new ParseField("next_execution_millis");
     static final ParseField NEXT_EXECUTION = new ParseField("next_execution");
     static final ParseField SNAPSHOT_IN_PROGRESS = new ParseField("in_progress");
+    static final ParseField POLICY_STATS = new ParseField("stats");
 
     private final SnapshotLifecyclePolicy policy;
     private final long version;
@@ -53,6 +54,7 @@ public class SnapshotLifecyclePolicyMetadata implements ToXContentObject {
     private final SnapshotInvocationRecord lastFailure;
     @Nullable
     private final SnapshotInProgress snapshotInProgress;
+    private final SnapshotLifecycleStats.SnapshotPolicyStats policyStats;
 
     @SuppressWarnings("unchecked")
     public static final ConstructingObjectParser<SnapshotLifecyclePolicyMetadata, String> PARSER =
@@ -65,8 +67,9 @@ public class SnapshotLifecyclePolicyMetadata implements ToXContentObject {
                 SnapshotInvocationRecord lastFailure = (SnapshotInvocationRecord) a[4];
                 long nextExecution = (long) a[5];
                 SnapshotInProgress sip = (SnapshotInProgress) a[6];
-
-                return new SnapshotLifecyclePolicyMetadata(policy, version, modifiedDate, lastSuccess, lastFailure, nextExecution, sip);
+                SnapshotLifecycleStats.SnapshotPolicyStats stats = (SnapshotLifecycleStats.SnapshotPolicyStats) a[7];
+                return new SnapshotLifecyclePolicyMetadata(policy, version, modifiedDate, lastSuccess,
+                    lastFailure, nextExecution, sip, stats);
             });
 
     static {
@@ -77,6 +80,9 @@ public class SnapshotLifecyclePolicyMetadata implements ToXContentObject {
         PARSER.declareObject(ConstructingObjectParser.optionalConstructorArg(), SnapshotInvocationRecord::parse, LAST_FAILURE);
         PARSER.declareLong(ConstructingObjectParser.constructorArg(), NEXT_EXECUTION_MILLIS);
         PARSER.declareObject(ConstructingObjectParser.optionalConstructorArg(), SnapshotInProgress::parse, SNAPSHOT_IN_PROGRESS);
+        PARSER.declareObject(ConstructingObjectParser.constructorArg(),
+            (p, c) -> SnapshotLifecycleStats.SnapshotPolicyStats.parse(p, "policy"), POLICY_STATS);
+
     }
 
     public static SnapshotLifecyclePolicyMetadata parse(XContentParser parser, String id) {
@@ -86,7 +92,8 @@ public class SnapshotLifecyclePolicyMetadata implements ToXContentObject {
     public SnapshotLifecyclePolicyMetadata(SnapshotLifecyclePolicy policy, long version, long modifiedDate,
                                            SnapshotInvocationRecord lastSuccess, SnapshotInvocationRecord lastFailure,
                                            long nextExecution,
-                                           @Nullable SnapshotInProgress snapshotInProgress) {
+                                           @Nullable SnapshotInProgress snapshotInProgress,
+                                           SnapshotLifecycleStats.SnapshotPolicyStats policyStats) {
         this.policy = policy;
         this.version = version;
         this.modifiedDate = modifiedDate;
@@ -94,6 +101,7 @@ public class SnapshotLifecyclePolicyMetadata implements ToXContentObject {
         this.lastFailure = lastFailure;
         this.nextExecution = nextExecution;
         this.snapshotInProgress = snapshotInProgress;
+        this.policyStats = policyStats;
     }
 
     public SnapshotLifecyclePolicy getPolicy() {
@@ -124,6 +132,10 @@ public class SnapshotLifecyclePolicyMetadata implements ToXContentObject {
         return this.nextExecution;
     }
 
+    public SnapshotLifecycleStats.SnapshotPolicyStats getPolicyStats() {
+        return this.policyStats;
+    }
+
     @Nullable
     public SnapshotInProgress getSnapshotInProgress() {
         return this.snapshotInProgress;
@@ -145,13 +157,16 @@ public class SnapshotLifecyclePolicyMetadata implements ToXContentObject {
         if (snapshotInProgress != null) {
             builder.field(SNAPSHOT_IN_PROGRESS.getPreferredName(), snapshotInProgress);
         }
+        builder.startObject(POLICY_STATS.getPreferredName());
+        this.policyStats.toXContent(builder, params);
+        builder.endObject();
         builder.endObject();
         return builder;
     }
 
     @Override
     public int hashCode() {
-        return Objects.hash(policy, version, modifiedDate, lastSuccess, lastFailure, nextExecution);
+        return Objects.hash(policy, version, modifiedDate, lastSuccess, lastFailure, nextExecution, policyStats);
     }
 
     @Override
@@ -168,7 +183,8 @@ public class SnapshotLifecyclePolicyMetadata implements ToXContentObject {
             Objects.equals(modifiedDate, other.modifiedDate) &&
             Objects.equals(lastSuccess, other.lastSuccess) &&
             Objects.equals(lastFailure, other.lastFailure) &&
-            Objects.equals(nextExecution, other.nextExecution);
+            Objects.equals(nextExecution, other.nextExecution) &&
+            Objects.equals(policyStats, other.policyStats);
     }
 
     public static class SnapshotInProgress implements ToXContentObject {

client/rest-high-level/src/main/java/org/elasticsearch/client/slm/SnapshotLifecycleStats.java

@@ -0,0 +1,261 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.client.slm;
+
+import org.elasticsearch.common.ParseField;
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.common.xcontent.ConstructingObjectParser;
+import org.elasticsearch.common.xcontent.ToXContentFragment;
+import org.elasticsearch.common.xcontent.ToXContentObject;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+public class SnapshotLifecycleStats implements ToXContentObject {
+
+    private final long retentionRunCount;
+    private final long retentionFailedCount;
+    private final long retentionTimedOut;
+    private final long retentionTimeMs;
+    private final Map<String, SnapshotPolicyStats> policyStats;
+
+    public static final ParseField RETENTION_RUNS = new ParseField("retention_runs");
+    public static final ParseField RETENTION_FAILED = new ParseField("retention_failed");
+    public static final ParseField RETENTION_TIMED_OUT = new ParseField("retention_timed_out");
+    public static final ParseField RETENTION_TIME = new ParseField("retention_deletion_time");
+    public static final ParseField RETENTION_TIME_MILLIS = new ParseField("retention_deletion_time_millis");
+    public static final ParseField POLICY_STATS = new ParseField("policy_stats");
+    public static final ParseField TOTAL_TAKEN = new ParseField("total_snapshots_taken");
+    public static final ParseField TOTAL_FAILED = new ParseField("total_snapshots_failed");
+    public static final ParseField TOTAL_DELETIONS = new ParseField("total_snapshots_deleted");
+    public static final ParseField TOTAL_DELETION_FAILURES = new ParseField("total_snapshot_deletion_failures");
+
+
+    @SuppressWarnings("unchecked")
+    private static final ConstructingObjectParser<SnapshotLifecycleStats, Void> PARSER =
+        new ConstructingObjectParser<>("snapshot_policy_stats", true,
+            a -> {
+                long runs = (long) a[0];
+                long failed = (long) a[1];
+                long timedOut = (long) a[2];
+                long timeMs = (long) a[3];
+                Map<String, SnapshotPolicyStats> policyStatsMap = ((List<SnapshotPolicyStats>) a[4]).stream()
+                    .collect(Collectors.toMap(m -> m.policyId, Function.identity()));
+                return new SnapshotLifecycleStats(runs, failed, timedOut, timeMs, policyStatsMap);
+            });
+
+    static {
+        PARSER.declareLong(ConstructingObjectParser.constructorArg(), RETENTION_RUNS);
+        PARSER.declareLong(ConstructingObjectParser.constructorArg(), RETENTION_FAILED);
+        PARSER.declareLong(ConstructingObjectParser.constructorArg(), RETENTION_TIMED_OUT);
+        PARSER.declareLong(ConstructingObjectParser.constructorArg(), RETENTION_TIME_MILLIS);
+        PARSER.declareNamedObjects(ConstructingObjectParser.constructorArg(), (p, c, n) -> SnapshotPolicyStats.parse(p, n), POLICY_STATS);
+    }
+
+    // Package visible for testing
+    private SnapshotLifecycleStats(long retentionRuns, long retentionFailed, long retentionTimedOut, long retentionTimeMs,
+                                   Map<String, SnapshotPolicyStats> policyStats) {
+        this.retentionRunCount = retentionRuns;
+        this.retentionFailedCount = retentionFailed;
+        this.retentionTimedOut = retentionTimedOut;
+        this.retentionTimeMs = retentionTimeMs;
+        this.policyStats = policyStats;
+    }
+
+    public static SnapshotLifecycleStats parse(XContentParser parser) {
+        return PARSER.apply(parser, null);
+    }
+
+    public long getRetentionRunCount() {
+        return retentionRunCount;
+    }
+
+    public long getRetentionFailedCount() {
+        return retentionFailedCount;
+    }
+
+    public long getRetentionTimedOut() {
+        return retentionTimedOut;
+    }
+
+    public long getRetentionTimeMillis() {
+        return retentionTimeMs;
+    }
+
+    /**
+     * @return a map of per-policy stats for each SLM policy
+     */
+    public Map<String, SnapshotPolicyStats> getMetrics() {
+        return Collections.unmodifiableMap(this.policyStats);
+    }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject();
+        builder.field(RETENTION_RUNS.getPreferredName(), this.retentionRunCount);
+        builder.field(RETENTION_FAILED.getPreferredName(), this.retentionFailedCount);
+        builder.field(RETENTION_TIMED_OUT.getPreferredName(), this.retentionTimedOut);
+        TimeValue retentionTime = TimeValue.timeValueMillis(this.retentionTimeMs);
+        builder.field(RETENTION_TIME.getPreferredName(), retentionTime);
+        builder.field(RETENTION_TIME_MILLIS.getPreferredName(), retentionTime.millis());
+
+        Map<String, SnapshotPolicyStats> metrics = getMetrics();
+        long totalTaken = metrics.values().stream().mapToLong(s -> s.snapshotsTaken).sum();
+        long totalFailed = metrics.values().stream().mapToLong(s -> s.snapshotsFailed).sum();
+        long totalDeleted = metrics.values().stream().mapToLong(s -> s.snapshotsDeleted).sum();
+        long totalDeleteFailures = metrics.values().stream().mapToLong(s -> s.snapshotDeleteFailures).sum();
+        builder.field(TOTAL_TAKEN.getPreferredName(), totalTaken);
+        builder.field(TOTAL_FAILED.getPreferredName(), totalFailed);
+        builder.field(TOTAL_DELETIONS.getPreferredName(), totalDeleted);
+        builder.field(TOTAL_DELETION_FAILURES.getPreferredName(), totalDeleteFailures);
+        builder.startObject(POLICY_STATS.getPreferredName());
+        for (Map.Entry<String, SnapshotPolicyStats> policy : metrics.entrySet()) {
+            SnapshotPolicyStats perPolicyMetrics = policy.getValue();
+            builder.startObject(perPolicyMetrics.policyId);
+            perPolicyMetrics.toXContent(builder, params);
+            builder.endObject();
+        }
+        builder.endObject();
+        builder.endObject();
+        return builder;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(retentionRunCount, retentionFailedCount, retentionTimedOut, retentionTimeMs, policyStats);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null) {
+            return false;
+        }
+        if (obj.getClass() != getClass()) {
+            return false;
+        }
+        SnapshotLifecycleStats other = (SnapshotLifecycleStats) obj;
+        return retentionRunCount == other.retentionRunCount &&
+            retentionFailedCount == other.retentionFailedCount &&
+            retentionTimedOut == other.retentionTimedOut &&
+            retentionTimeMs == other.retentionTimeMs &&
+            Objects.equals(policyStats, other.policyStats);
+    }
+
+    @Override
+    public String toString() {
+        return Strings.toString(this);
+    }
+
+    public static class SnapshotPolicyStats implements ToXContentFragment {
+        private final String policyId;
+        private final long snapshotsTaken;
+        private final long snapshotsFailed;
+        private final long snapshotsDeleted;
+        private final long snapshotDeleteFailures;
+
+        static final ParseField SNAPSHOTS_TAKEN = new ParseField("snapshots_taken");
+        static final ParseField SNAPSHOTS_FAILED = new ParseField("snapshots_failed");
+        static final ParseField SNAPSHOTS_DELETED = new ParseField("snapshots_deleted");
+        static final ParseField SNAPSHOT_DELETION_FAILURES = new ParseField("snapshot_deletion_failures");
+
+        private static final ConstructingObjectParser<SnapshotPolicyStats, String> PARSER =
+            new ConstructingObjectParser<>("snapshot_policy_stats", true,
+                (a, id) -> {
+                    long taken = (long) a[0];
+                    long failed = (long) a[1];
+                    long deleted = (long) a[2];
+                    long deleteFailed = (long) a[3];
+                    return new SnapshotPolicyStats(id, taken, failed, deleted, deleteFailed);
+                });
+
+        static {
+            PARSER.declareLong(ConstructingObjectParser.constructorArg(), SNAPSHOTS_TAKEN);
+            PARSER.declareLong(ConstructingObjectParser.constructorArg(), SNAPSHOTS_FAILED);
+            PARSER.declareLong(ConstructingObjectParser.constructorArg(), SNAPSHOTS_DELETED);
+            PARSER.declareLong(ConstructingObjectParser.constructorArg(), SNAPSHOT_DELETION_FAILURES);
+        }
+
+        public SnapshotPolicyStats(String policyId, long snapshotsTaken, long snapshotsFailed, long deleted, long failedDeletes) {
+            this.policyId = policyId;
+            this.snapshotsTaken = snapshotsTaken;
+            this.snapshotsFailed = snapshotsFailed;
+            this.snapshotsDeleted = deleted;
+            this.snapshotDeleteFailures = failedDeletes;
+        }
+
+        public static SnapshotPolicyStats parse(XContentParser parser, String policyId) {
+            return PARSER.apply(parser, policyId);
+        }
+
+        public long getSnapshotsTaken() {
+            return snapshotsTaken;
+        }
+
+        public long getSnapshotsFailed() {
+            return snapshotsFailed;
+        }
+
+        public long getSnapshotsDeleted() {
+            return snapshotsDeleted;
+        }
+
+        public long getSnapshotDeleteFailures() {
+            return snapshotDeleteFailures;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(policyId, snapshotsTaken, snapshotsFailed, snapshotsDeleted, snapshotDeleteFailures);
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (obj == null) {
+                return false;
+            }
+            if (obj.getClass() != getClass()) {
+                return false;
+            }
+            SnapshotPolicyStats other = (SnapshotPolicyStats) obj;
+            return Objects.equals(policyId, other.policyId) &&
+                snapshotsTaken == other.snapshotsTaken &&
+                snapshotsFailed == other.snapshotsFailed &&
+                snapshotsDeleted == other.snapshotsDeleted &&
+                snapshotDeleteFailures == other.snapshotDeleteFailures;
+        }
+
+        @Override
+        public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+            builder.field(SnapshotPolicyStats.SNAPSHOTS_TAKEN.getPreferredName(), snapshotsTaken);
+            builder.field(SnapshotPolicyStats.SNAPSHOTS_FAILED.getPreferredName(), snapshotsFailed);
+            builder.field(SnapshotPolicyStats.SNAPSHOTS_DELETED.getPreferredName(), snapshotsDeleted);
+            builder.field(SnapshotPolicyStats.SNAPSHOT_DELETION_FAILURES.getPreferredName(), snapshotDeleteFailures);
+            return builder;
+        }
+    }
+}

client/rest-high-level/src/main/java/org/elasticsearch/client/slm/SnapshotRetentionConfiguration.java

@@ -0,0 +1,133 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.client.slm;
+
+import org.elasticsearch.common.Nullable;
+import org.elasticsearch.common.ParseField;
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.common.xcontent.ConstructingObjectParser;
+import org.elasticsearch.common.xcontent.ToXContentObject;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
+
+import java.io.IOException;
+import java.util.Objects;
+
+public class SnapshotRetentionConfiguration implements ToXContentObject {
+
+    public static final SnapshotRetentionConfiguration EMPTY = new SnapshotRetentionConfiguration(null, null, null);
+
+    private static final ParseField EXPIRE_AFTER = new ParseField("expire_after");
+    private static final ParseField MINIMUM_SNAPSHOT_COUNT = new ParseField("min_count");
+    private static final ParseField MAXIMUM_SNAPSHOT_COUNT = new ParseField("max_count");
+
+    private static final ConstructingObjectParser<SnapshotRetentionConfiguration, Void> PARSER =
+        new ConstructingObjectParser<>("snapshot_retention", true, a -> {
+            TimeValue expireAfter = a[0] == null ? null : TimeValue.parseTimeValue((String) a[0], EXPIRE_AFTER.getPreferredName());
+            Integer minCount = (Integer) a[1];
+            Integer maxCount = (Integer) a[2];
+            return new SnapshotRetentionConfiguration(expireAfter, minCount, maxCount);
+        });
+
+    static {
+        PARSER.declareString(ConstructingObjectParser.optionalConstructorArg(), EXPIRE_AFTER);
+        PARSER.declareInt(ConstructingObjectParser.optionalConstructorArg(), MINIMUM_SNAPSHOT_COUNT);
+        PARSER.declareInt(ConstructingObjectParser.optionalConstructorArg(), MAXIMUM_SNAPSHOT_COUNT);
+    }
+
+    private final TimeValue expireAfter;
+    private final Integer minimumSnapshotCount;
+    private final Integer maximumSnapshotCount;
+
+    public SnapshotRetentionConfiguration(@Nullable TimeValue expireAfter,
+                                          @Nullable Integer minimumSnapshotCount,
+                                          @Nullable Integer maximumSnapshotCount) {
+        this.expireAfter = expireAfter;
+        this.minimumSnapshotCount = minimumSnapshotCount;
+        this.maximumSnapshotCount = maximumSnapshotCount;
+        if (this.minimumSnapshotCount != null && this.minimumSnapshotCount < 1) {
+            throw new IllegalArgumentException("minimum snapshot count must be at least 1, but was: " + this.minimumSnapshotCount);
+        }
+        if (this.maximumSnapshotCount != null && this.maximumSnapshotCount < 1) {
+            throw new IllegalArgumentException("maximum snapshot count must be at least 1, but was: " + this.maximumSnapshotCount);
+        }
+        if ((maximumSnapshotCount != null && minimumSnapshotCount != null) && this.minimumSnapshotCount > this.maximumSnapshotCount) {
+            throw new IllegalArgumentException("minimum snapshot count " + this.minimumSnapshotCount +
+                " cannot be larger than maximum snapshot count " + this.maximumSnapshotCount);
+        }
+    }
+
+    public static SnapshotRetentionConfiguration parse(XContentParser parser, String name) {
+        return PARSER.apply(parser, null);
+    }
+
+    public TimeValue getExpireAfter() {
+        return this.expireAfter;
+    }
+
+    public Integer getMinimumSnapshotCount() {
+        return this.minimumSnapshotCount;
+    }
+
+    public Integer getMaximumSnapshotCount() {
+        return this.maximumSnapshotCount;
+    }
+
+    @Override
+    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.startObject();
+        if (expireAfter != null) {
+            builder.field(EXPIRE_AFTER.getPreferredName(), expireAfter.getStringRep());
+        }
+        if (minimumSnapshotCount != null) {
+            builder.field(MINIMUM_SNAPSHOT_COUNT.getPreferredName(), minimumSnapshotCount);
+        }
+        if (maximumSnapshotCount != null) {
+            builder.field(MAXIMUM_SNAPSHOT_COUNT.getPreferredName(), maximumSnapshotCount);
+        }
+        builder.endObject();
+        return builder;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(expireAfter, minimumSnapshotCount, maximumSnapshotCount);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == null) {
+            return false;
+        }
+        if (obj.getClass() != getClass()) {
+            return false;
+        }
+        SnapshotRetentionConfiguration other = (SnapshotRetentionConfiguration) obj;
+        return Objects.equals(this.expireAfter, other.expireAfter) &&
+            Objects.equals(minimumSnapshotCount, other.minimumSnapshotCount) &&
+            Objects.equals(maximumSnapshotCount, other.maximumSnapshotCount);
+    }
+
+    @Override
+    public String toString() {
+        return Strings.toString(this);
+    }
+}

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/AcknowledgedTasksResponse.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.TaskOperationFailure;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/DataFrameNamedXContentProvider.java

@@ -17,10 +17,10 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
-import org.elasticsearch.client.dataframe.transforms.SyncConfig;
-import org.elasticsearch.client.dataframe.transforms.TimeSyncConfig;
+import org.elasticsearch.client.transform.transforms.SyncConfig;
+import org.elasticsearch.client.transform.transforms.TimeSyncConfig;
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.NamedXContentRegistry;
 import org.elasticsearch.plugins.spi.NamedXContentProvider;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/DeleteDataFrameTransformRequest.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.client.Validatable;
 import org.elasticsearch.client.ValidationException;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/GetDataFrameTransformRequest.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.client.Validatable;
 import org.elasticsearch.client.ValidationException;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/GetDataFrameTransformResponse.java

@@ -17,9 +17,9 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
-import org.elasticsearch.client.dataframe.transforms.DataFrameTransformConfig;
+import org.elasticsearch.client.transform.transforms.DataFrameTransformConfig;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/GetDataFrameTransformStatsRequest.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.client.Validatable;
 import org.elasticsearch.client.ValidationException;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/GetDataFrameTransformStatsResponse.java

@@ -17,11 +17,11 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.TaskOperationFailure;
-import org.elasticsearch.client.dataframe.transforms.DataFrameTransformStats;
+import org.elasticsearch.client.transform.transforms.DataFrameTransformStats;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/PreviewDataFrameTransformRequest.java

@@ -17,11 +17,11 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.client.Validatable;
 import org.elasticsearch.client.ValidationException;
-import org.elasticsearch.client.dataframe.transforms.DataFrameTransformConfig;
+import org.elasticsearch.client.transform.transforms.DataFrameTransformConfig;
 import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.common.xcontent.ToXContentObject;
 import org.elasticsearch.common.xcontent.XContentBuilder;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/PreviewDataFrameTransformResponse.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.common.xcontent.XContentParser;
 

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/PutDataFrameTransformRequest.java

@@ -17,11 +17,11 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.client.Validatable;
 import org.elasticsearch.client.ValidationException;
-import org.elasticsearch.client.dataframe.transforms.DataFrameTransformConfig;
+import org.elasticsearch.client.transform.transforms.DataFrameTransformConfig;
 import org.elasticsearch.common.xcontent.ToXContentObject;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/StartDataFrameTransformRequest.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.client.Validatable;
 import org.elasticsearch.client.ValidationException;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/StartDataFrameTransformResponse.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.TaskOperationFailure;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/StopDataFrameTransformRequest.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.client.Validatable;
 import org.elasticsearch.client.ValidationException;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/StopDataFrameTransformResponse.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.TaskOperationFailure;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/UpdateDataFrameTransformRequest.java

@@ -17,11 +17,11 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
 import org.elasticsearch.client.Validatable;
 import org.elasticsearch.client.ValidationException;
-import org.elasticsearch.client.dataframe.transforms.DataFrameTransformConfigUpdate;
+import org.elasticsearch.client.transform.transforms.DataFrameTransformConfigUpdate;
 import org.elasticsearch.common.xcontent.ToXContentObject;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/UpdateDataFrameTransformResponse.java

@@ -17,9 +17,9 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe;
+package org.elasticsearch.client.transform;
 
-import org.elasticsearch.client.dataframe.transforms.DataFrameTransformConfig;
+import org.elasticsearch.client.transform.transforms.DataFrameTransformConfig;
 import org.elasticsearch.common.xcontent.XContentParser;
 
 import java.util.Objects;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/DataFrameIndexerPosition.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/DataFrameIndexerTransformStats.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.client.core.IndexerJobStats;
 import org.elasticsearch.common.ParseField;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/DataFrameTransformCheckpointStats.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/DataFrameTransformCheckpointingInfo.java

@@ -17,9 +17,9 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
-import org.elasticsearch.client.dataframe.transforms.util.TimeUtil;
+import org.elasticsearch.client.transform.transforms.util.TimeUtil;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/DataFrameTransformConfig.java

@@ -17,11 +17,11 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.Version;
-import org.elasticsearch.client.dataframe.transforms.pivot.PivotConfig;
-import org.elasticsearch.client.dataframe.transforms.util.TimeUtil;
+import org.elasticsearch.client.transform.transforms.pivot.PivotConfig;
+import org.elasticsearch.client.transform.transforms.util.TimeUtil;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.Strings;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/DataFrameTransformConfigUpdate.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.Strings;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/DataFrameTransformProgress.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.ParseField;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/DataFrameTransformStats.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/DestConfig.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/NodeAttributes.java

@@ -16,7 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.Strings;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/QueryConfig.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.common.xcontent.ToXContentObject;
 import org.elasticsearch.common.xcontent.XContentBuilder;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/SourceConfig.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/SyncConfig.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.common.xcontent.ToXContentObject;
 

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/TimeSyncConfig.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms;
+package org.elasticsearch.client.transform.transforms;
 
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.unit.TimeValue;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/pivot/AggregationConfig.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms.pivot;
+package org.elasticsearch.client.transform.transforms.pivot;
 
 import org.elasticsearch.common.xcontent.ToXContentObject;
 import org.elasticsearch.common.xcontent.XContentBuilder;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/pivot/DateHistogramGroupSource.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms.pivot;
+package org.elasticsearch.client.transform.transforms.pivot;
 
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/pivot/GroupConfig.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms.pivot;
+package org.elasticsearch.client.transform.transforms.pivot;
 
 import org.elasticsearch.common.ParsingException;
 import org.elasticsearch.common.Strings;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/pivot/HistogramGroupSource.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms.pivot;
+package org.elasticsearch.client.transform.transforms.pivot;
 
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/pivot/PivotConfig.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms.pivot;
+package org.elasticsearch.client.transform.transforms.pivot;
 
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ConstructingObjectParser;

client/rest-high-level/src/main/java/org/elasticsearch/client/transform/transforms/pivot/SingleGroupSource.java

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-package org.elasticsearch.client.dataframe.transforms.pivot;
+package org.elasticsearch.client.transform.transforms.pivot;
 
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ToXContentObject;