/**
* 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.mapreduce.v2.app.job.impl;
import java.util.Map;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.MapTaskAttemptImpl;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.jobhistory.JobHistoryParser.TaskInfo;
import org.apache.hadoop.mapreduce.security.token.JobTokenIdentifier;
import org.apache.hadoop.mapreduce.split.JobSplit.TaskSplitMetaInfo;
import org.apache.hadoop.mapreduce.v2.api.records.JobId;
import org.apache.hadoop.mapreduce.v2.api.records.TaskId;
import org.apache.hadoop.mapreduce.v2.api.records.TaskType;
import org.apache.hadoop.mapreduce.v2.app.AppContext;
import org.apache.hadoop.mapreduce.v2.app.TaskAttemptListener;
import org.apache.hadoop.mapreduce.v2.app.metrics.MRAppMetrics;
import org.apache.hadoop.security.Credentials;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.yarn.Clock;
import org.apache.hadoop.yarn.event.EventHandler;
@SuppressWarnings({ "rawtypes" })
public class MapTaskImpl extends TaskImpl {
private final TaskSplitMetaInfo taskSplitMetaInfo;
public MapTaskImpl(JobId jobId, int partition, EventHandler eventHandler,
Path remoteJobConfFile, JobConf conf,
TaskSplitMetaInfo taskSplitMetaInfo,
TaskAttemptListener taskAttemptListener,
Token<JobTokenIdentifier> jobToken,
Credentials credentials, Clock clock,
Map<TaskId, TaskInfo> completedTasksFromPreviousRun, int startCount,
MRAppMetrics metrics, AppContext appContext) {
super(jobId, TaskType.MAP, partition, eventHandler, remoteJobConfFile,
conf, taskAttemptListener, jobToken, credentials, clock,
completedTasksFromPreviousRun, startCount, metrics, appContext);
this.taskSplitMetaInfo = taskSplitMetaInfo;
}
@Override
protected int getMaxAttempts() {
return conf.getInt(MRJobConfig.MAP_MAX_ATTEMPTS, 4);
}
@Override
protected TaskAttemptImpl createAttempt() {
return new MapTaskAttemptImpl(getID(), nextAttemptNumber,
eventHandler, jobFile,
partition, taskSplitMetaInfo, conf, taskAttemptListener,
jobToken, credentials, clock, appContext);
}
@Override
public TaskType getType() {
return TaskType.MAP;
}
protected TaskSplitMetaInfo getTaskSplitMetaInfo() {
return this.taskSplitMetaInfo;
}
/**
* @return a String formatted as a comma-separated list of splits.
*/
@Override
protected String getSplitsAsString() {
String[] splits = getTaskSplitMetaInfo().getLocations();
if (splits == null || splits.length == 0)
return "";
StringBuilder sb = new StringBuilder();
for (int i = 0; i < splits.length; i++) {
if (i != 0) sb.append(",");
sb.append(splits[i]);
}
return sb.toString();
}
}