org.kepler.hadoop.mapreduce

Class Mapper4Cross

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.Mapper4Cross

public class Mapper4Cross
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>

This class include a mapper for Cross actor. It gets data from hadoop, executes sub-workflow in the cross actor via Kepler engine, and sends outputs back to hadoop.

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
Mapper4Cross()

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

Mapper4Cross

public Mapper4Cross()

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