mapreduce/src/contrib/streaming/src/test/org/apache/hadoop/streaming/ValueCountReduce.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 java.io.*;
import java.util.Date;

import java.io.IOException;
import java.util.Iterator;

import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reducer;
import org.apache.hadoop.mapred.Reporter;

public class ValueCountReduce implements Reducer {

  /**
   * @param args
   */
  public static void main(String[] args) {
    // TODO Auto-generated method stub

  }

  public void reduce(Object arg0, Iterator arg1, OutputCollector arg2, Reporter arg3) throws IOException {
    int count = 0;
    while (arg1.hasNext()) {
      count += 1;
      arg1.next();
    }
    arg2.collect(arg0, new Text("" + count));
  }

  public void configure(JobConf arg0) {
    // TODO Auto-generated method stub
    
  }

  public void close() throws IOException {
    // TODO Auto-generated method stub
    
  }

}