org.apache.hadoop.examples.pi
Class DistSum.ReduceSide.SummingReducer

java.lang.Object
  org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.IntWritable,SummationWritable,org.apache.hadoop.io.NullWritable,TaskResult>
      org.apache.hadoop.examples.pi.DistSum.ReduceSide.SummingReducer

Enclosing class:

DistSum.ReduceSide

public static class DistSum.ReduceSide.SummingReducer
extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.IntWritable,SummationWritable,org.apache.hadoop.io.NullWritable,TaskResult>

A Reducer which computes sums

Nested Class Summary

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

org.apache.hadoop.mapreduce.Reducer.Context

Constructor Summary

DistSum.ReduceSide.SummingReducer()

Method Summary

protected void

reduce(org.apache.hadoop.io.IntWritable index, Iterable<SummationWritable> sums, 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

DistSum.ReduceSide.SummingReducer

public DistSum.ReduceSide.SummingReducer()

Method Detail

reduce

protected void reduce(org.apache.hadoop.io.IntWritable index,
                      Iterable<SummationWritable> sums,
                      org.apache.hadoop.mapreduce.Reducer.Context context)
               throws IOException,
                      InterruptedException

Overrides:

reduce in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.IntWritable,SummationWritable,org.apache.hadoop.io.NullWritable,TaskResult>

Throws:

IOException

InterruptedException