io.apigee.trireme.samples.hadoop

Class HadoopReducer

java.lang.Object

org.apache.hadoop.mapred.MapReduceBase

io.apigee.trireme.samples.hadoop.HadoopBase

io.apigee.trireme.samples.hadoop.HadoopReducer

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

public class HadoopReducer
extends HadoopBase
implements org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Here's our reducer. See "HadoopMapper" for more comments.

Field Summary

Fields inherited from class io.apigee.trireme.samples.hadoop.HadoopBase

env, module, runningScript, SCRIPT_FILE_KEY, scriptFileName

Constructor Summary

Constructors

Constructor and Description
HadoopReducer()

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
void	reduce(org.apache.hadoop.io.Text key, Iterator<org.apache.hadoop.io.Text> values, org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text> out, org.apache.hadoop.mapred.Reporter reporter)

Methods inherited from class io.apigee.trireme.samples.hadoop.HadoopBase

configure, startNodeModule, stopNodeModule

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.mapred.JobConfigurable

configure

Constructor Detail

HadoopReducer

public HadoopReducer()

Method Detail

reduce

public void reduce(org.apache.hadoop.io.Text key,
          Iterator<org.apache.hadoop.io.Text> values,
          org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text> out,
          org.apache.hadoop.mapred.Reporter reporter)
            throws IOException

Specified by:

reduce in interface org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Throws:

IOException

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class org.apache.hadoop.mapred.MapReduceBase