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

java.lang.Object
  org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.NullWritable,SummationWritable,org.apache.hadoop.io.IntWritable,SummationWritable>
      org.apache.hadoop.examples.pi.DistSum.ReduceSide.PartitionMapper

Enclosing class:

DistSum.ReduceSide

public static class DistSum.ReduceSide.PartitionMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.NullWritable,SummationWritable,org.apache.hadoop.io.IntWritable,SummationWritable>

A Mapper which partitions a summation

Nested Class Summary

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

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

DistSum.ReduceSide.PartitionMapper()

Method Summary

protected void

map(org.apache.hadoop.io.NullWritable nw, SummationWritable sigma, org.apache.hadoop.mapreduce.Mapper.Context context) Partitions sigma into parts

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

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.PartitionMapper

public DistSum.ReduceSide.PartitionMapper()

Method Detail

map

protected void map(org.apache.hadoop.io.NullWritable nw,
                   SummationWritable sigma,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws IOException,
                   InterruptedException

Partitions sigma into parts

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.NullWritable,SummationWritable,org.apache.hadoop.io.IntWritable,SummationWritable>

Throws:

IOException

InterruptedException