datafu.hourglass.mapreduce
Class DelegatingMapper

java.lang.Object
  org.apache.hadoop.mapreduce.Mapper<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>
      datafu.hourglass.mapreduce.DelegatingMapper

public class DelegatingMapper
extends org.apache.hadoop.mapreduce.Mapper<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>

A Hadoop mapper which delegates to an implementation read from the distributed cache.

Author:

"Matthew Hayes"

Nested Class Summary

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

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

DelegatingMapper()

Method Summary

protected void	cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
protected void	map(java.lang.Object key, java.lang.Object value, org.apache.hadoop.mapreduce.Mapper.Context context)
protected void	setup(org.apache.hadoop.mapreduce.Mapper.Context context)

Methods inherited from class org.apache.hadoop.mapreduce.Mapper

run

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DelegatingMapper

public DelegatingMapper()

Method Detail

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
              throws java.io.IOException,
                     java.lang.InterruptedException

Overrides:

setup in class org.apache.hadoop.mapreduce.Mapper<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>

Throws:

java.io.IOException

java.lang.InterruptedException

map

protected void map(java.lang.Object key,
                   java.lang.Object value,
                   org.apache.hadoop.mapreduce.Mapper.Context context)
            throws java.io.IOException,
                   java.lang.InterruptedException

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>

Throws:

java.io.IOException

java.lang.InterruptedException

cleanup

protected void cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
                throws java.io.IOException,
                       java.lang.InterruptedException

Overrides:

cleanup in class org.apache.hadoop.mapreduce.Mapper<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>

Throws:

java.io.IOException

java.lang.InterruptedException