Package org.apache.hadoop.examples

Class SecondarySort.Reduce

java.lang.Object

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

org.apache.hadoop.examples.SecondarySort.Reduce

Enclosing class:

SecondarySort

public static class SecondarySort.Reduce
extends org.apache.hadoop.mapreduce.Reducer<SecondarySort.IntPair,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

A reducer class that just emits the sum of the input values.

Nested Class Summary

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

org.apache.hadoop.mapreduce.Reducer.Context

Constructor Summary

Constructors

Constructor	Description
Reduce()

Method Summary

Modifier and Type	Method	Description
void	reduce(SecondarySort.IntPair key, java.lang.Iterable<org.apache.hadoop.io.IntWritable> values, org.apache.hadoop.mapreduce.Reducer.Context context)

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

Reduce

public Reduce()

Method Detail

reduce

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

Overrides:

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

Throws:

java.io.IOException

java.lang.InterruptedException