MiniMRClusterWithNodeGroup.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.apache.hadoop.mapred;

import java.io.IOException;

import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.net.StaticMapping;

public class MiniMRClusterWithNodeGroup extends MiniMRCluster {

  private String[] nodeGroups;

  public MiniMRClusterWithNodeGroup(int numTaskTrackers, String namenode, int numDir, 
      String[] racks, String[] nodeGroups, String[] hosts, JobConf conf) throws IOException {
    super(numTaskTrackers, namenode, numDir, racks, hosts, conf);
    this.nodeGroups = nodeGroups;
  }

  /**
   * Start the tasktracker.
   */
  @Override
  public void startTaskTracker(String host, String rack,
      int idx, int numDir) throws IOException {
    if (rack != null && nodeGroups != null) {
      StaticMapping.addNodeToRack(host, rack + nodeGroups);
    }

    if (host != null) {
      NetUtils.addStaticResolution(host, "localhost");
    }

    TaskTrackerRunner taskTracker;
    taskTracker = new TaskTrackerRunner(idx, numDir, host, conf);

    addTaskTracker(taskTracker);
  }

}