Indexing: Make default hadoop coordinates configurable.

indexing-service/src/main/java/io/druid/indexing/common/config/TaskConfig.java

@@ -21,57 +21,71 @@ package io.druid.indexing.common.config;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.common.collect.ImmutableList;
 
 import java.io.File;
+import java.util.List;
 
 public class TaskConfig
 {
-  @JsonProperty
+  public static List<String> DEFAULT_DEFAULT_HADOOP_COORDINATES = ImmutableList.of(
+      "org.apache.hadoop:hadoop-client:2.3.0"
+  );
+
   private final String baseDir;
-
-  @JsonProperty
   private final File baseTaskDir;
-
-  @JsonProperty
   private final String hadoopWorkingPath;
-
-  @JsonProperty
   private final int defaultRowFlushBoundary;
+  private final List<String> defaultHadoopCoordinates;
 
   @JsonCreator
   public TaskConfig(
       @JsonProperty("baseDir") String baseDir,
       @JsonProperty("baseTaskDir") String baseTaskDir,
       @JsonProperty("hadoopWorkingPath") String hadoopWorkingPath,
-      @JsonProperty("defaultRowFlushBoundary") Integer defaultRowFlushBoundary
+      @JsonProperty("defaultRowFlushBoundary") Integer defaultRowFlushBoundary,
+      @JsonProperty("defaultHadoopCoordinates") List<String> defaultHadoopCoordinates
   )
   {
     this.baseDir = baseDir == null ? "/tmp" : baseDir;
     this.baseTaskDir = new File(defaultDir(baseTaskDir, "persistent/task"));
     this.hadoopWorkingPath = defaultDir(hadoopWorkingPath, "druid-indexing");
     this.defaultRowFlushBoundary = defaultRowFlushBoundary == null ? 500000 : defaultRowFlushBoundary;
+    this.defaultHadoopCoordinates = defaultHadoopCoordinates == null
+                                    ? DEFAULT_DEFAULT_HADOOP_COORDINATES
+                                    : defaultHadoopCoordinates;
   }
 
+  @JsonProperty
   public String getBaseDir()
   {
     return baseDir;
   }
 
+  @JsonProperty
   public File getBaseTaskDir()
   {
     return baseTaskDir;
   }
 
+  @JsonProperty
   public String getHadoopWorkingPath()
   {
     return hadoopWorkingPath;
   }
 
+  @JsonProperty
   public int getDefaultRowFlushBoundary()
   {
     return defaultRowFlushBoundary;
   }
 
+  @JsonProperty
+  public List<String> getDefaultHadoopCoordinates()
+  {
+    return defaultHadoopCoordinates;
+  }
+
   private String defaultDir(String configParameter, final String defaultVal)
   {
     if (configParameter == null) {
@@ -80,4 +94,4 @@ public class TaskConfig
 
     return configParameter;
   }
-}
+}

indexing-service/src/main/java/io/druid/indexing/common/task/HadoopIndexTask.java

@@ -27,6 +27,7 @@ import com.google.api.client.util.Lists;
 import com.google.common.base.Joiner;
 import com.google.common.base.Optional;
 import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Iterables;
 import com.metamx.common.logger.Logger;
 import io.druid.common.utils.JodaUtils;
@@ -65,8 +66,6 @@ public class HadoopIndexTask extends AbstractTask
     extensionsConfig = Initialization.makeStartupInjector().getInstance(ExtensionsConfig.class);
   }
 
-  public static String DEFAULT_HADOOP_COORDINATES = "org.apache.hadoop:hadoop-client:2.3.0";
-
   private static String getTheDataSource(HadoopIngestionSpec spec, HadoopIngestionSpec config)
   {
     if (spec != null) {
@@ -115,9 +114,14 @@ public class HadoopIndexTask extends AbstractTask
     Preconditions.checkArgument(this.spec.getTuningConfig().getWorkingPath() == null, "workingPath must be absent");
     Preconditions.checkArgument(this.spec.getIOConfig().getMetadataUpdateSpec() == null, "updaterJobSpec must be absent");
 
-    this.hadoopDependencyCoordinates = hadoopDependencyCoordinates == null ? Arrays.<String>asList(
-        hadoopCoordinates == null ? DEFAULT_HADOOP_COORDINATES : hadoopCoordinates
-    ) : hadoopDependencyCoordinates;
+    if (hadoopDependencyCoordinates != null) {
+      this.hadoopDependencyCoordinates = hadoopDependencyCoordinates;
+    } else if (hadoopCoordinates != null) {
+      this.hadoopDependencyCoordinates = ImmutableList.of(hadoopCoordinates);
+    } else {
+      // Will be defaulted to something at runtime, based on taskConfig.
+      this.hadoopDependencyCoordinates = null;
+    }
   }
 
   @Override
@@ -158,6 +162,10 @@ public class HadoopIndexTask extends AbstractTask
   @Override
   public TaskStatus run(TaskToolbox toolbox) throws Exception
   {
+    final List<String> finalHadoopDependencyCoordinates = hadoopDependencyCoordinates != null
+                                                          ? hadoopDependencyCoordinates
+                                                          : toolbox.getConfig().getDefaultHadoopCoordinates();
+
     final DefaultTeslaAether aetherClient = Initialization.getAetherClient(extensionsConfig);
 
     final List<URL> extensionURLs = Lists.newArrayList();
@@ -174,7 +182,7 @@ public class HadoopIndexTask extends AbstractTask
     final List<URL> driverURLs = Lists.newArrayList();
     driverURLs.addAll(nonHadoopURLs);
     // put hadoop dependencies last to avoid jets3t & apache.httpcore version conflicts
-    for (String hadoopDependencyCoordinate : hadoopDependencyCoordinates) {
+    for (String hadoopDependencyCoordinate : finalHadoopDependencyCoordinates) {
       final ClassLoader hadoopLoader = Initialization.getClassLoaderForCoordinates(
           aetherClient, hadoopDependencyCoordinate
       );