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

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<Object,Text,Text,IntWritable>
      extended by org.apache.hadoop.mapreduce.lib.map.TokenCounterMapper

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

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


Constructor Summary
TokenCounterMapper()
           
 
Method Summary
 void map(Object key, Text value, 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 Detail

TokenCounterMapper

public TokenCounterMapper()
Method Detail

map

public void map(Object key,
                Text value,
                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


Copyright © 2012 Apache Software Foundation. All Rights Reserved.