QA: Create a test plugin with configuration

In order to test the way plugins with configuration are installed and removed
we need a plugin with configuration in the repository. The simplest way to
get one is to make an "example" plugin.

In the process of making this example it became aparent that cat actions were
difficult to create outside of the org.elasticsearch.rest.action.cat package
because key methods in AbstractCatAction were package private. This makes them
protected and uses them to create the example configured plugin.

Relates to #12717 but is only one step of many to close it.

core/src/main/java/org/elasticsearch/rest/action/cat/AbstractCatAction.java

@@ -37,11 +37,11 @@ public abstract class AbstractCatAction extends BaseRestHandler {
         super(settings, controller, client);
     }
 
-    abstract void doRequest(final RestRequest request, final RestChannel channel, final Client client);
+    protected abstract void doRequest(final RestRequest request, final RestChannel channel, final Client client);
 
-    abstract void documentation(StringBuilder sb);
+    protected abstract void documentation(StringBuilder sb);
 
-    abstract Table getTableWithHeader(final RestRequest request);
+    protected abstract Table getTableWithHeader(final RestRequest request);
 
     @Override
     public void handleRequest(final RestRequest request, final RestChannel channel, final Client client) throws Exception {

core/src/main/java/org/elasticsearch/rest/action/cat/RestAliasAction.java

@@ -49,7 +49,7 @@ public class RestAliasAction extends AbstractCatAction {
 
 
     @Override
-    void doRequest(final RestRequest request, final RestChannel channel, final Client client) {
+    protected void doRequest(final RestRequest request, final RestChannel channel, final Client client) {
         final GetAliasesRequest getAliasesRequest = request.hasParam("alias") ?
                 new GetAliasesRequest(request.param("alias")) :
                 new GetAliasesRequest();
@@ -65,13 +65,13 @@ public class RestAliasAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/aliases\n");
         sb.append("/_cat/aliases/{alias}\n");
     }
 
     @Override
-    Table getTableWithHeader(RestRequest request) {
+    protected Table getTableWithHeader(RestRequest request) {
         final Table table = new Table();
         table.startHeaders();
         table.addCell("alias", "alias:a;desc:alias name");

core/src/main/java/org/elasticsearch/rest/action/cat/RestAllocationAction.java

@@ -52,7 +52,7 @@ public class RestAllocationAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/allocation\n");
     }
 
@@ -83,7 +83,7 @@ public class RestAllocationAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(final RestRequest request) {
+    protected Table getTableWithHeader(final RestRequest request) {
         final Table table = new Table();
         table.startHeaders();
         table.addCell("shards", "alias:s;text-align:right;desc:number of shards on node");

core/src/main/java/org/elasticsearch/rest/action/cat/RestCountAction.java

@@ -48,7 +48,7 @@ public class RestCountAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/count\n");
         sb.append("/_cat/count/{index}\n");
     }
@@ -76,7 +76,7 @@ public class RestCountAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(final RestRequest request) {
+    protected Table getTableWithHeader(final RestRequest request) {
         Table table = new Table();
         table.startHeaders();
         table.addCell("epoch", "alias:t,time;desc:seconds since 1970-01-01 00:00:00, that the count was executed");

core/src/main/java/org/elasticsearch/rest/action/cat/RestFielddataAction.java

@@ -53,7 +53,7 @@ public class RestFielddataAction extends AbstractCatAction {
     }
 
     @Override
-    void doRequest(final RestRequest request, final RestChannel channel, final Client client) {
+    protected void doRequest(final RestRequest request, final RestChannel channel, final Client client) {
 
         final NodesStatsRequest nodesStatsRequest = new NodesStatsRequest("data:true");
         nodesStatsRequest.clear();
@@ -70,13 +70,13 @@ public class RestFielddataAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/fielddata\n");
         sb.append("/_cat/fielddata/{fields}\n");
     }
 
     @Override
-    Table getTableWithHeader(RestRequest request) {
+    protected Table getTableWithHeader(RestRequest request) {
         Table table = new Table();
         table.startHeaders()
                 .addCell("id", "desc:node id")

core/src/main/java/org/elasticsearch/rest/action/cat/RestHealthAction.java

@@ -48,7 +48,7 @@ public class RestHealthAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/health\n");
     }
 
@@ -65,7 +65,7 @@ public class RestHealthAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(final RestRequest request) {
+    protected Table getTableWithHeader(final RestRequest request) {
         Table t = new Table();
         t.startHeaders();
         t.addCell("epoch", "alias:t,time;desc:seconds since 1970-01-01 00:00:00");

core/src/main/java/org/elasticsearch/rest/action/cat/RestIndicesAction.java

@@ -62,7 +62,7 @@ public class RestIndicesAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/indices\n");
         sb.append("/_cat/indices/{index}\n");
     }
@@ -103,7 +103,7 @@ public class RestIndicesAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(final RestRequest request) {
+    protected Table getTableWithHeader(final RestRequest request) {
         Table table = new Table();
         table.startHeaders();
         table.addCell("health", "alias:h;desc:current health status");

core/src/main/java/org/elasticsearch/rest/action/cat/RestMasterAction.java

@@ -42,7 +42,7 @@ public class RestMasterAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/master\n");
     }
 
@@ -62,7 +62,7 @@ public class RestMasterAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(final RestRequest request) {
+    protected Table getTableWithHeader(final RestRequest request) {
         Table table = new Table();
         table.startHeaders()
                 .addCell("id", "desc:node id")

core/src/main/java/org/elasticsearch/rest/action/cat/RestNodeAttrsAction.java

@@ -50,7 +50,7 @@ public class RestNodeAttrsAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/nodeattrs\n");
     }
 
@@ -84,7 +84,7 @@ public class RestNodeAttrsAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(final RestRequest request) {
+    protected Table getTableWithHeader(final RestRequest request) {
         Table table = new Table();
         table.startHeaders();
         table.addCell("node", "default:true;alias:name;desc:node name");

core/src/main/java/org/elasticsearch/rest/action/cat/RestNodesAction.java

@@ -73,7 +73,7 @@ public class RestNodesAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/nodes\n");
     }
 
@@ -107,7 +107,7 @@ public class RestNodesAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(final RestRequest request) {
+    protected Table getTableWithHeader(final RestRequest request) {
         Table table = new Table();
         table.startHeaders();
         table.addCell("id", "default:false;alias:id,nodeId;desc:unique node id");

core/src/main/java/org/elasticsearch/rest/action/cat/RestPendingClusterTasksAction.java

@@ -40,7 +40,7 @@ public class RestPendingClusterTasksAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/pending_tasks\n");
     }
 
@@ -59,7 +59,7 @@ public class RestPendingClusterTasksAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(final RestRequest request) {
+    protected Table getTableWithHeader(final RestRequest request) {
         Table t = new Table();
         t.startHeaders();
         t.addCell("insertOrder", "alias:o;text-align:right;desc:task insertion order");

core/src/main/java/org/elasticsearch/rest/action/cat/RestPluginsAction.java

@@ -47,7 +47,7 @@ public class RestPluginsAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/plugins\n");
     }
 
@@ -74,7 +74,7 @@ public class RestPluginsAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(final RestRequest request) {
+    protected Table getTableWithHeader(final RestRequest request) {
         Table table = new Table();
         table.startHeaders();
         table.addCell("id", "default:false;desc:unique node id");

core/src/main/java/org/elasticsearch/rest/action/cat/RestRecoveryAction.java

@@ -58,7 +58,7 @@ public class RestRecoveryAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/recovery\n");
         sb.append("/_cat/recovery/{index}\n");
     }
@@ -79,7 +79,7 @@ public class RestRecoveryAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(RestRequest request) {
+    protected Table getTableWithHeader(RestRequest request) {
         Table t = new Table();
         t.startHeaders()
                 .addCell("index", "alias:i,idx;desc:index name")

core/src/main/java/org/elasticsearch/rest/action/cat/RestSegmentsAction.java

@@ -49,7 +49,7 @@ public class RestSegmentsAction extends AbstractCatAction {
     }
 
     @Override
-    void doRequest(final RestRequest request, final RestChannel channel, final Client client) {
+    protected void doRequest(final RestRequest request, final RestChannel channel, final Client client) {
         final String[] indices = Strings.splitStringByCommaToArray(request.param("index"));
 
         final ClusterStateRequest clusterStateRequest = new ClusterStateRequest();
@@ -75,13 +75,13 @@ public class RestSegmentsAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/segments\n");
         sb.append("/_cat/segments/{index}\n");
     }
 
     @Override
-    Table getTableWithHeader(RestRequest request) {
+    protected Table getTableWithHeader(RestRequest request) {
         Table table = new Table();
         table.startHeaders();
         table.addCell("index", "default:true;alias:i,idx;desc:index name");

core/src/main/java/org/elasticsearch/rest/action/cat/RestShardsAction.java

@@ -50,7 +50,7 @@ public class RestShardsAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/shards\n");
         sb.append("/_cat/shards/{index}\n");
     }
@@ -78,7 +78,7 @@ public class RestShardsAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(final RestRequest request) {
+    protected Table getTableWithHeader(final RestRequest request) {
         Table table = new Table();
         table.startHeaders()
                 .addCell("index", "default:true;alias:i,idx;desc:index name")

core/src/main/java/org/elasticsearch/rest/action/cat/RestThreadPoolAction.java

@@ -112,7 +112,7 @@ public class RestThreadPoolAction extends AbstractCatAction {
     }
 
     @Override
-    void documentation(StringBuilder sb) {
+    protected void documentation(StringBuilder sb) {
         sb.append("/_cat/thread_pool\n");
     }
 
@@ -146,7 +146,7 @@ public class RestThreadPoolAction extends AbstractCatAction {
     }
 
     @Override
-    Table getTableWithHeader(final RestRequest request) {
+    protected Table getTableWithHeader(final RestRequest request) {
         Table table = new Table();
         table.startHeaders();
         table.addCell("id", "default:false;alias:nodeId;desc:unique node id");

qa/configured-plugin/LICENSE.txt

@@ -0,0 +1,202 @@
+
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qa/configured-plugin/NOTICE.txt

@@ -0,0 +1,8 @@
+Elasticsearch
+Copyright 2009-2015 Elasticsearch
+
+This product includes software developed by The Apache Software
+Foundation (http://www.apache.org/).
+
+The LICENSE and NOTICE files for all dependencies may be found in the licenses/
+directory.

qa/configured-plugin/README.md

@@ -0,0 +1,25 @@
+Example Configured Plugin for Elasticsearch
+===========================================
+
+```sh
+bin/plugin install configured_example
+```
+
+License
+-------
+
+    This software is licensed under the Apache 2 license, quoted below.
+
+    Copyright 2009-2014 Elasticsearch <http://www.elasticsearch.org>
+
+    Licensed 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.

qa/configured-plugin/pom.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.elasticsearch.plugin</groupId>
+        <artifactId>elasticsearch-plugin</artifactId>
+        <version>2.0.0-beta1-SNAPSHOT</version>
+        <relativePath>../plugins</relativePath>
+    </parent>
+
+    <artifactId>elasticsearch-example-configured</artifactId>
+    <name>QA: Elasticsearch Example Configured Plugin</name>
+    <description>Plugin used to test plugins that install configuration.</description>
+
+    <properties>
+        <elasticsearch.plugin.classname>org.elasticsearch.plugin.configured.ConfiguredExamplePlugin</elasticsearch.plugin.classname>
+        <tests.rest.suite>configured_example</tests.rest.suite>
+        <tests.rest.load_packaged>false</tests.rest.load_packaged>
+    </properties>
+
+    <!-- Needs no dependencies beyond the standard list for plugins -->
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <configuration>
+                    <descriptors>
+                        <descriptor>src/main/assemblies/plugin.xml</descriptor>
+                    </descriptors>
+                </configuration>
+            </plugin>
+         </plugins>
+    </build>
+</project>

qa/configured-plugin/rest-api-spec/api/cat.configured_example.json

@@ -0,0 +1,24 @@
+{
+  "cat.configured_example": {
+    "documentation": "",
+    "methods": ["GET"],
+    "url": {
+      "path": "/_cat/configured_example",
+      "paths": ["/_cat/configured_example"],
+      "parts": {},
+      "params": {
+        "help": {
+          "type": "boolean",
+          "description": "Return help information",
+          "default": false
+        },
+        "v": {
+          "type": "boolean",
+          "description": "Verbose mode. Display column headers",
+          "default": true
+        }
+      }
+    },
+    "body": null
+  }
+}

qa/configured-plugin/rest-api-spec/test/configured_example/10_basic.yaml

@@ -0,0 +1,23 @@
+---
+"Help":
+  - do:
+      cat.configured_example:
+        help: true
+
+  - match:
+      $body: |
+               /^  test    .+   \n
+               $/
+
+---
+"Data":
+
+  - do:
+      cat.configured_example:
+        v: false
+
+  - match:
+      $body: |
+            /^
+               foo       \s+
+            $/

qa/configured-plugin/src/main/assemblies/plugin.xml

@@ -0,0 +1,32 @@
+<?xml version="1.0"?>
+<assembly>
+    <id>plugin</id>
+    <formats>
+        <format>zip</format>
+    </formats>
+    <includeBaseDirectory>false</includeBaseDirectory>
+    <files>
+        <file>
+            <source>${elasticsearch.tools.directory}/plugin-metadata/plugin-descriptor.properties</source>
+            <outputDirectory></outputDirectory>
+            <filtered>true</filtered>
+        </file>
+    </files>
+    <fileSets>
+        <fileSet>
+            <directory>src/main/config</directory>
+            <outputDirectory>config</outputDirectory>
+        </fileSet>
+    </fileSets>
+    <dependencySets>
+        <dependencySet>
+            <outputDirectory>/</outputDirectory>
+            <useProjectArtifact>true</useProjectArtifact>
+            <useTransitiveFiltering>true</useTransitiveFiltering>
+            <useTransitiveDependencies>true</useTransitiveDependencies>
+            <excludes>
+                <exclude>org.elasticsearch:elasticsearch</exclude>
+            </excludes>
+        </dependencySet>
+    </dependencySets>
+</assembly>

qa/configured-plugin/src/main/config/example.yaml

@@ -0,0 +1 @@
+test: foo

qa/configured-plugin/src/main/java/org/elasticsearch/plugin/configured/ConfiguredExampleCatAction.java

@@ -0,0 +1,79 @@
+/*
+ * 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.plugin.configured;
+
+import org.elasticsearch.client.Client;
+import org.elasticsearch.common.Table;
+import org.elasticsearch.common.inject.Inject;
+import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.rest.*;
+import org.elasticsearch.rest.action.cat.AbstractCatAction;
+import org.elasticsearch.rest.action.support.RestTable;
+
+import static org.elasticsearch.rest.RestRequest.Method.GET;
+
+/**
+ * Example of adding a cat action with a plugin.
+ */
+public class ConfiguredExampleCatAction extends AbstractCatAction {
+    private final ConfiguredExamplePluginConfiguration config;
+
+    @Inject
+    public ConfiguredExampleCatAction(Settings settings, RestController controller,
+            Client client, ConfiguredExamplePluginConfiguration config) {
+        super(settings, controller, client);
+        this.config = config;
+        controller.registerHandler(GET, "/_cat/configured_example", this);
+    }
+
+    @Override
+    protected void doRequest(final RestRequest request, final RestChannel channel, final Client client) {
+        Table table = getTableWithHeader(request);
+        table.startRow();
+        table.addCell(config.getTestConfig());
+        table.endRow();
+        try {
+            channel.sendResponse(RestTable.buildResponse(table, channel));
+        } catch (Throwable e) {
+            try {
+                channel.sendResponse(new BytesRestResponse(channel, e));
+            } catch (Throwable e1) {
+                logger.error("failed to send failure response", e1);
+            }
+        }
+    }
+
+    @Override
+    protected void documentation(StringBuilder sb) {
+        sb.append(documentation());
+    }
+
+    public static String documentation() {
+        return "/_cat/configured_example\n";
+    }
+
+    @Override
+    protected Table getTableWithHeader(RestRequest request) {
+        final Table table = new Table();
+        table.startHeaders();
+        table.addCell("test", "desc:test");
+        table.endHeaders();
+        return table;
+    }
+}

qa/configured-plugin/src/main/java/org/elasticsearch/plugin/configured/ConfiguredExamplePlugin.java

@@ -0,0 +1,62 @@
+/*
+ * 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.plugin.configured;
+
+import org.elasticsearch.common.inject.AbstractModule;
+import org.elasticsearch.common.inject.Inject;
+import org.elasticsearch.common.inject.Module;
+import org.elasticsearch.common.inject.multibindings.Multibinder;
+import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.plugins.AbstractPlugin;
+import org.elasticsearch.rest.action.cat.AbstractCatAction;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+/**
+ * Example configured plugin.
+ */
+public class ConfiguredExamplePlugin extends AbstractPlugin {
+    @Override
+    public String name() {
+        return "configured-example";
+    }
+
+    @Override
+    public String description() {
+        return "Example of a configured plugin";
+    }
+
+    @Override
+    public Collection<Class<? extends Module>> modules() {
+        Collection<Class<? extends Module>> classes = new ArrayList<>();
+        classes.add(ConfiguredExampleModule.class);
+        return classes;
+    }
+
+    public static class ConfiguredExampleModule extends AbstractModule {
+        @Override
+        protected void configure() {
+          bind(ConfiguredExamplePluginConfiguration.class).asEagerSingleton();
+          Multibinder<AbstractCatAction> catActionMultibinder = Multibinder.newSetBinder(binder(), AbstractCatAction.class);
+          catActionMultibinder.addBinding().to(ConfiguredExampleCatAction.class).asEagerSingleton();
+        }
+    }
+}

qa/configured-plugin/src/main/java/org/elasticsearch/plugin/configured/ConfiguredExamplePluginConfiguration.java

@@ -0,0 +1,80 @@
+/*
+ * 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.plugin.configured;
+
+import org.elasticsearch.ElasticsearchParseException;
+import org.elasticsearch.common.inject.AbstractModule;
+import org.elasticsearch.common.inject.Inject;
+import org.elasticsearch.common.inject.Module;
+import org.elasticsearch.common.inject.multibindings.Multibinder;
+import org.elasticsearch.common.inject.name.Names;
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.common.xcontent.yaml.YamlXContent;
+import org.elasticsearch.common.logging.ESLogger;
+import org.elasticsearch.common.logging.Loggers;
+import org.elasticsearch.env.Environment;
+import org.elasticsearch.plugins.AbstractPlugin;
+import org.elasticsearch.rest.action.cat.AbstractCatAction;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Collection;
+
+import static org.elasticsearch.common.io.Streams.copyToString;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static java.nio.file.Files.newBufferedReader;
+
+/**
+ * Example configuration.
+ */
+public class ConfiguredExamplePluginConfiguration {
+    private String test = "not set in config";
+
+    @Inject
+    public ConfiguredExamplePluginConfiguration(Environment env) throws IOException {
+        // The directory part of the location matches the artifactId of this plugin
+        Path configFile = env.configFile().resolve("example-configured/example.yaml");
+        String contents = copyToString(newBufferedReader(configFile, UTF_8));
+        XContentParser parser = YamlXContent.yamlXContent.createParser(contents);
+
+        String currentFieldName = null;
+        XContentParser.Token token = parser.nextToken();
+        assert token == XContentParser.Token.START_OBJECT;
+        while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
+            if (token == XContentParser.Token.FIELD_NAME) {
+                currentFieldName = parser.currentName();
+            } else if (token.isValue()) {
+                if ("test".equals(currentFieldName)) {
+                    test = parser.text();
+                } else {
+                    throw new ElasticsearchParseException("Unrecognized config key: {}", currentFieldName);
+                }
+            } else {
+                throw new ElasticsearchParseException("Unrecognized config key: {}", currentFieldName);
+            }
+        }
+    }
+
+    public String getTestConfig() {
+        return test;
+    }
+}

qa/configured-plugin/src/test/java/org/elasticsearch/plugin/configured/ConfiguredExampleCatActionTest.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.plugin.configured;
+
+import org.elasticsearch.rest.RestController;
+import org.elasticsearch.test.ESTestCase;
+
+import static org.hamcrest.Matchers.containsString;
+
+public class ConfiguredExampleCatActionTest extends ESTestCase {
+    public void testDocumentation() {
+        // Intentionally perfunctory just to have something to demonstrate
+        assertThat(ConfiguredExampleCatAction.documentation(), containsString("configured_example"));
+    }
+}

qa/configured-plugin/src/test/java/org/elasticsearch/plugin/configured/ConfiguredExamplePluginRestIT.java

@@ -0,0 +1,40 @@
+/*
+ * 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.plugin.configured;
+
+import com.carrotsearch.randomizedtesting.annotations.Name;
+import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;
+import org.elasticsearch.test.rest.ESRestTestCase;
+import org.elasticsearch.test.rest.RestTestCandidate;
+import org.elasticsearch.test.rest.parser.RestTestParseException;
+
+import java.io.IOException;
+
+public class ConfiguredExamplePluginRestIT extends ESRestTestCase {
+
+    public ConfiguredExamplePluginRestIT(@Name("yaml") RestTestCandidate testCandidate) {
+        super(testCandidate);
+    }
+
+    @ParametersFactory
+    public static Iterable<Object[]> parameters() throws IOException, RestTestParseException {
+        return ESRestTestCase.createParameters(0, 1);
+    }
+}