src/contrib/streaming/src/java/org/apache/hadoop/streaming/PipeMapRunner.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.streaming;

import org.apache.hadoop.mapred.MapRunner;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.mapred.RecordReader;
import org.apache.hadoop.mapred.OutputCollector;

import java.io.IOException;

public class PipeMapRunner<K1, V1, K2, V2> extends MapRunner<K1, V1, K2, V2> {
  public void run(RecordReader<K1, V1> input, OutputCollector<K2, V2> output,
                  Reporter reporter)
         throws IOException {
    PipeMapper pipeMapper = (PipeMapper)getMapper();
    pipeMapper.startOutputThreads(output, reporter);
    super.run(input, output, reporter);
  }
}