org.apache.hadoop.examples

Class MultiFileWordCount.MapClass

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

org.apache.hadoop.examples.MultiFileWordCount.MapClass

Enclosing class:

MultiFileWordCount

public static class MultiFileWordCount.MapClass
extends Mapper<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

This Mapper is similar to the one in WordCount.MapClass.

Nested Class Summary

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

Mapper.Context

Constructor Summary

Constructors

Constructor and Description
MultiFileWordCount.MapClass()

Method Summary

Methods

Modifier and Type	Method and Description
void	map(MultiFileWordCount.WordOffset key, org.apache.hadoop.io.Text value, Mapper.Context context) Called once for each key/value pair in the input split.

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

MultiFileWordCount.MapClass

public MultiFileWordCount.MapClass()

Method Detail

map

public void map(MultiFileWordCount.WordOffset key,
       org.apache.hadoop.io.Text value,
       Mapper.Context context)
         throws java.io.IOException,
                java.lang.InterruptedException

Description copied from class: Mapper

Called once for each key/value pair in the input split. Most applications should override this, but the default is the identity function.

Overrides:

map in class Mapper<MultiFileWordCount.WordOffset,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

Throws:

java.io.IOException

java.lang.InterruptedException