edu.stolaf.cs.wmrserver.streaming
Class PipeReducer

java.lang.Object
  edu.stolaf.cs.wmrserver.streaming.PipeMapRed
      edu.stolaf.cs.wmrserver.streaming.PipeReducer

All Implemented Interfaces:

java.io.Closeable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Reducer

public class PipeReducer
extends PipeMapRed
implements org.apache.hadoop.mapred.Reducer

A generic Reducer bridge. It delegates operations to an external program via stdin and stdout.

Field Summary

Fields inherited from class edu.stolaf.cs.wmrserver.streaming.PipeMapRed

LOG, outerrThreadsThrowable

Constructor Summary

PipeReducer()

Method Summary

void	close()
void	configure(org.apache.hadoop.mapred.JobConf job)
void	reduce(java.lang.Object key, java.util.Iterator values, org.apache.hadoop.mapred.OutputCollector output, org.apache.hadoop.mapred.Reporter reporter)

Methods inherited from class edu.stolaf.cs.wmrserver.streaming.PipeMapRed

getContext, mapRedFinished

Methods inherited from class java.lang.Object

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

Constructor Detail

PipeReducer

public PipeReducer()

Method Detail

configure

public void configure(org.apache.hadoop.mapred.JobConf job)

Specified by:

configure in interface org.apache.hadoop.mapred.JobConfigurable

Overrides:

configure in class PipeMapRed

reduce

public void reduce(java.lang.Object key,
                   java.util.Iterator values,
                   org.apache.hadoop.mapred.OutputCollector output,
                   org.apache.hadoop.mapred.Reporter reporter)
            throws java.io.IOException

Specified by:

reduce in interface org.apache.hadoop.mapred.Reducer

Throws:

java.io.IOException

close

public void close()

Specified by:

close in interface java.io.Closeable