Package org.apache.hadoop.examples

Class AggregateWordCount

java.lang.Object

org.apache.hadoop.examples.AggregateWordCount

public class AggregateWordCount
extends java.lang.Object

This is an example Aggregated Hadoop Map/Reduce application. It reads the text input files, breaks each line into words and counts them. The output is a locally sorted list of words and the count of how often they occurred. To run: bin/hadoop jar hadoop-*-examples.jar aggregatewordcount in-dir out-dir numOfReducers textinputformat

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AggregateWordCount.WordCountPlugInClass

Constructor Summary

Constructors

Constructor	Description
AggregateWordCount()

Method Summary

Modifier and Type	Method	Description
static void	main(java.lang.String[] args)	The main driver for word count map/reduce program.

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregateWordCount

public AggregateWordCount()

Method Detail

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException,
                        java.lang.InterruptedException,
                        java.lang.ClassNotFoundException

The main driver for word count map/reduce program. Invoke this method to submit the map/reduce job.

Throws:

java.io.IOException - When there is communication problems with the job tracker.

java.lang.InterruptedException

java.lang.ClassNotFoundException