hadoop MapOutputCollector 源码
haddop MapOutputCollector 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/MapOutputCollector.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.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.mapred.Task.TaskReporter;
@InterfaceAudience.LimitedPrivate({"MapReduce"})
@InterfaceStability.Unstable
public interface MapOutputCollector<K, V> {
public void init(Context context
) throws IOException, ClassNotFoundException;
public void collect(K key, V value, int partition
) throws IOException, InterruptedException;
public void close() throws IOException, InterruptedException;
public void flush() throws IOException, InterruptedException,
ClassNotFoundException;
@InterfaceAudience.LimitedPrivate({"MapReduce"})
@InterfaceStability.Unstable
public static class Context {
private final MapTask mapTask;
private final JobConf jobConf;
private final TaskReporter reporter;
public Context(MapTask mapTask, JobConf jobConf, TaskReporter reporter) {
this.mapTask = mapTask;
this.jobConf = jobConf;
this.reporter = reporter;
}
public MapTask getMapTask() {
return mapTask;
}
public JobConf getJobConf() {
return jobConf;
}
public TaskReporter getReporter() {
return reporter;
}
}
}
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