org.apache.hadoop.examples

Class WordCount.TokenizerMapper

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<java.lang.Object,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

org.apache.hadoop.examples.WordCount.TokenizerMapper

Enclosing class:

WordCount

public static class WordCount.TokenizerMapper
extends Mapper<java.lang.Object,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

Nested Class Summary

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

Mapper.Context

Constructor Summary

Constructors

Constructor and Description
WordCount.TokenizerMapper()

Method Summary

Methods

Modifier and Type	Method and Description
void	map(java.lang.Object 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

WordCount.TokenizerMapper

public WordCount.TokenizerMapper()

Method Detail

map

public void map(java.lang.Object 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<java.lang.Object,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.IntWritable>

Throws:

java.io.IOException

java.lang.InterruptedException