org.apache.hadoop.examples.terasort

Class TeraGenWithCRC.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.TeraGenWithCRC.SortGenMapper

Enclosing class:

TeraGenWithCRC

public static class TeraGenWithCRC.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 and Description
TeraGenWithCRC.SortGenMapper()

Method Summary

Methods

Modifier and Type	Method and 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

TeraGenWithCRC.SortGenMapper

public TeraGenWithCRC.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 IOException,
                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:

IOException

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>