hadoop MapTaskStatus 源码
haddop MapTaskStatus 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/MapTaskStatus.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.DataInput;
import java.io.DataOutput;
import java.io.IOException;
class MapTaskStatus extends TaskStatus {
private long mapFinishTime = 0;
public MapTaskStatus() {}
public MapTaskStatus(TaskAttemptID taskid, float progress, int numSlots,
State runState, String diagnosticInfo, String stateString,
String taskTracker, Phase phase, Counters counters) {
super(taskid, progress, numSlots, runState, diagnosticInfo, stateString,
taskTracker, phase, counters);
}
@Override
public boolean getIsMap() {
return true;
}
/**
* Sets finishTime.
* @param finishTime finish time of task.
*/
@Override
void setFinishTime(long finishTime) {
super.setFinishTime(finishTime);
// set mapFinishTime if it hasn't been set before
if (getMapFinishTime() == 0) {
setMapFinishTime(finishTime);
}
}
@Override
public long getShuffleFinishTime() {
throw new UnsupportedOperationException("getShuffleFinishTime() not supported for MapTask");
}
@Override
void setShuffleFinishTime(long shuffleFinishTime) {
throw new UnsupportedOperationException("setShuffleFinishTime() not supported for MapTask");
}
@Override
public long getMapFinishTime() {
return mapFinishTime;
}
@Override
void setMapFinishTime(long mapFinishTime) {
this.mapFinishTime = mapFinishTime;
}
@Override
synchronized void statusUpdate(TaskStatus status) {
super.statusUpdate(status);
if (status.getMapFinishTime() != 0) {
this.mapFinishTime = status.getMapFinishTime();
}
}
@Override
public void readFields(DataInput in) throws IOException {
super.readFields(in);
mapFinishTime = in.readLong();
}
@Override
public void write(DataOutput out) throws IOException {
super.write(out);
out.writeLong(mapFinishTime);
}
@Override
public void addFetchFailedMap(TaskAttemptID mapTaskId) {
throw new UnsupportedOperationException
("addFetchFailedMap() not supported for MapTask");
}
}
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