org.apache.hadoop.examples

Class WordCount.IntSumReducer

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

org.apache.hadoop.examples.WordCount.IntSumReducer

Enclosing class:

WordCount

public static class WordCount.IntSumReducer
extends Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer

Reducer.Context

Constructor Summary

Constructors

Constructor and Description
WordCount.IntSumReducer()

Method Summary

Methods

Modifier and Type	Method and Description
void	reduce(org.apache.hadoop.io.Text key, java.lang.Iterable<org.apache.hadoop.io.IntWritable> values, Reducer.Context context) This method is called once for each key.

Methods inherited from class org.apache.hadoop.mapreduce.Reducer

cleanup, run, setup

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WordCount.IntSumReducer

public WordCount.IntSumReducer()

Method Detail

reduce

public void reduce(org.apache.hadoop.io.Text key,
          java.lang.Iterable<org.apache.hadoop.io.IntWritable> values,
          Reducer.Context context)
            throws java.io.IOException,
                   java.lang.InterruptedException

Description copied from class: Reducer

This method is called once for each key. Most applications will define their reduce class by overriding this method. The default implementation is an identity function.

Overrides:

reduce in class Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

Throws:

java.io.IOException

java.lang.InterruptedException