tez-mapreduce/src/main/java/org/apache/tez/mapreduce/hadoop/mapreduce/TaskAttemptContextImpl.java

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 * 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
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 *     http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.tez.mapreduce.hadoop.mapreduce;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.Counter;
import org.apache.hadoop.mapreduce.TaskAttemptID;
import org.apache.hadoop.mapreduce.TaskID;
import org.apache.hadoop.mapreduce.TaskType;
import org.apache.tez.mapreduce.common.Utils;
import org.apache.tez.runtime.api.TezTaskContext;

// NOTE: NEWTEZ: This is a copy of org.apache.tez.mapreduce.hadoop.mapred (not mapreduce). mapred likely does not need it's own copy of this class.
// Meant for use by the "mapreduce" API

@InterfaceAudience.Private
@InterfaceStability.Unstable
public class TaskAttemptContextImpl
       extends org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl {

  private TezTaskContext taskContext;

  // FIXME we need to use DAG Id but we are using App Id
  public TaskAttemptContextImpl(Configuration conf,
      TezTaskContext taskContext, boolean isMap) {
    // TODO NEWTEZ Can the jt Identifier string be taskContext.getUniqueId ?
    this(conf, new TaskAttemptID(
        new TaskID(String.valueOf(taskContext.getApplicationId()
            .getClusterTimestamp()), taskContext.getApplicationId().getId(),
            isMap ? TaskType.MAP : TaskType.REDUCE,
            taskContext.getTaskIndex()),
            taskContext.getTaskAttemptNumber()), taskContext);
  }

  public TaskAttemptContextImpl(Configuration conf, TaskAttemptID taId, TezTaskContext context) {
    super(conf, taId);
    this.taskContext = context;
  }

  @Override
  public float getProgress() {
    // TODO NEWTEZ Will this break anything ?
    return 0.0f;
  }

  @Override
  public Counter getCounter(Enum<?> counterName) {
    return Utils.getMRCounter(taskContext.getCounters().findCounter(counterName));
  }

  @Override
  public Counter getCounter(String groupName, String counterName) {
    return Utils.getMRCounter(taskContext.getCounters().findCounter(groupName, counterName));
  }

  /**
   * Report progress.
   */
  @Override
  public void progress() {
    // Nothing to do.
  }

  /**
   * Set the current status of the task to the given string.
   */
  @Override
  public void setStatus(String status) {
    setStatusString(status);
    // Nothing to do until InputContext supports some kind of custom string
    // diagnostics.
  }
}