org.kepler.hadoop.mapreduce

Class Mapper4DataTransform

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable>

org.kepler.hadoop.mapreduce.Mapper4DataTransform

public class Mapper4DataTransform
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable>

Mapper4DataTransform is a subclass of the Mapper to read data using a certain input format and save it in SequenceFile format. It is mainly a pre-processing for DualInput patterns.

Author:

Jianwu Wang (jianwu@sdsc.edu)

Nested Class Summary

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

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

Constructors

Constructor and Description
Mapper4DataTransform()

Method Summary

Modifier and Type	Method and Description
protected void	cleanup(org.apache.hadoop.mapreduce.Mapper.Context context)
void	map(org.apache.hadoop.io.WritableComparable key, org.apache.hadoop.io.Writable value, org.apache.hadoop.mapreduce.Mapper.Context context)
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

Mapper4DataTransform

public Mapper4DataTransform()

Method Detail

setup

public void setup(org.apache.hadoop.mapreduce.Mapper.Context context)

Overrides:

setup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable>

map

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

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable>

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<org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable,org.apache.hadoop.io.WritableComparable,org.apache.hadoop.io.Writable>

Throws:

java.io.IOException

java.lang.InterruptedException