comm.PrintKeysReducer.java Source code

Introduction

Here is the source code for comm.PrintKeysReducer.java

Source

/*
 * ============================================================
 * The SSE USTC Software License
 * 
 * PrintKeysReducer.java
 * 20141014
 * 
 * Copyright (c) 2006 China Payment and Remittance Service Co.,Ltd        
 * All rights reserved.
 * ============================================================
 */
package comm;

import java.io.IOException;

import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Reducer;

/**
 *  ??Key
 * <p>
 * date           author            email                 notes<br />
 * ----------------------------------------------------------------<br />
 *20141014                 starqiu@mail.ustc.edu.cn       <br /></p>
 *
 */
public class PrintKeysReducer extends Reducer<Text, Object, Text, NullWritable> {

    public void reduce(Text _key, Iterable<Object> values, Context context)
            throws IOException, InterruptedException {
        // process values
        context.write(_key, NullWritable.get());
        //      System.out.println(_key);
    }

}