Package org.apache.hadoop.mapreduce.lib.map

Class TokenCounterMapper

java.lang.Object

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

org.apache.hadoop.mapreduce.lib.map.TokenCounterMapper

@Public
@Stable
public class TokenCounterMapper
extends Mapper<Object,Text,Text,IntWritable>

Tokenize the input values and emit each word with a count of 1.

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
TokenCounterMapper()

Method Summary

Modifier and Type	Method	Description
void	map(Object key, Text value, Mapper<Object,Text,Text,IntWritable>.org.apache.hadoop.mapreduce.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 Details

TokenCounterMapper

public TokenCounterMapper()

Method Details

map

public void map(Object key,
 Text value,
 Mapper<Object,Text,Text,IntWritable>.org.apache.hadoop.mapreduce.Mapper.Context context)
         throws IOException,
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<Object,Text,Text,IntWritable>

Throws:

IOException

InterruptedException