hadoop IFileWrappedMapOutput 源码

  • 2022-10-20
  • 浏览 (204)

haddop IFileWrappedMapOutput 代码

文件路径:/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/task/reduce/IFileWrappedMapOutput.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.mapreduce.task.reduce;

import java.io.IOException;
import java.io.InputStream;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapred.IFileInputStream;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.mapreduce.TaskAttemptID;

/**
 * Common code for allowing MapOutput classes to handle streams.
 *
 * @param <K> key type for map output
 * @param <V> value type for map output
 */
public abstract class IFileWrappedMapOutput<K, V> extends MapOutput<K, V> {
  private final Configuration conf;
  private final MergeManagerImpl<K, V> merger;

  public IFileWrappedMapOutput(
      Configuration c, MergeManagerImpl<K, V> m, TaskAttemptID mapId,
      long size, boolean primaryMapOutput) {
    super(mapId, size, primaryMapOutput);
    conf = c;
    merger = m;
  }

  /**
   * @return the merger
   */
  protected MergeManagerImpl<K, V> getMerger() {
    return merger;
  }

  protected abstract void doShuffle(
      MapHost host, IFileInputStream iFileInputStream,
      long compressedLength, long decompressedLength,
      ShuffleClientMetrics metrics, Reporter reporter) throws IOException;

  @Override
  public void shuffle(MapHost host, InputStream input,
                      long compressedLength, long decompressedLength,
                      ShuffleClientMetrics metrics,
                      Reporter reporter) throws IOException {
    doShuffle(host, new IFileInputStream(input, compressedLength, conf),
        compressedLength, decompressedLength, metrics, reporter);
  }
}

相关信息

hadoop 源码目录

相关文章

hadoop EventFetcher 源码

hadoop ExceptionReporter 源码

hadoop Fetcher 源码

hadoop InMemoryMapOutput 源码

hadoop InMemoryReader 源码

hadoop InMemoryWriter 源码

hadoop LocalFetcher 源码

hadoop MapHost 源码

hadoop MapOutput 源码

hadoop MergeManager 源码

0  赞