org.apache.hadoop.examples

Class BaileyBorweinPlouffe.BbpMapper

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable>

org.apache.hadoop.examples.BaileyBorweinPlouffe.BbpMapper

Enclosing class:

BaileyBorweinPlouffe

public static class BaileyBorweinPlouffe.BbpMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable>

Mapper class computing digits of Pi.

Nested Class Summary

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

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

Constructors

Constructor and Description
BbpMapper()

Method Summary

Modifier and Type	Method and Description
protected void	map(org.apache.hadoop.io.LongWritable offset, org.apache.hadoop.io.IntWritable length, org.apache.hadoop.mapreduce.Mapper.Context context) Compute the (offset+1)th to (offset+length)th digits.

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

BbpMapper

public BbpMapper()

Method Detail

map

protected void map(org.apache.hadoop.io.LongWritable offset,
                   org.apache.hadoop.io.IntWritable length,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws IOException,
                   InterruptedException

Compute the (offset+1)th to (offset+length)th digits.

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.IntWritable,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable>

Throws:

IOException

InterruptedException