Package org.apache.hadoop.examples.terasort

Class TeraGen.SortGenMapper

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

org.apache.hadoop.examples.terasort.TeraGen.SortGenMapper

Enclosing class:

TeraGen

public static class TeraGen.SortGenMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

The Mapper class that given a row number, will generate the appropriate output line.

Nested Class Summary

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

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

Constructors

Constructor	Description
SortGenMapper()

Method Summary

Modifier and Type	Method	Description
void	cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
void	map(org.apache.hadoop.io.LongWritable row, org.apache.hadoop.io.NullWritable ignored, org.apache.hadoop.mapreduce.Mapper.Context context)

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

run, setup

Methods inherited from class java.lang.Object

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

Constructor Detail

SortGenMapper

public SortGenMapper()

Method Detail

map

public void map(org.apache.hadoop.io.LongWritable row,
                org.apache.hadoop.io.NullWritable ignored,
                org.apache.hadoop.mapreduce.Mapper.Context context)
         throws java.io.IOException,
                java.lang.InterruptedException

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Throws:

java.io.IOException

java.lang.InterruptedException

cleanup

public void cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)

Overrides:

cleanup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>