org.apache.hadoop.examples

Class AggregateWordHistogram

java.lang.Object

org.apache.hadoop.examples.AggregateWordHistogram

public class AggregateWordHistogram
extends java.lang.Object

This is an example Aggregated Hadoop Map/Reduce application. Computes the histogram of the words in the input texts. To run: bin/hadoop jar hadoop-examples-*.jar aggregatewordhist in-dir out-dir numOfReducers textinputformat

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AggregateWordHistogram.AggregateWordHistogramPlugin

Constructor Summary

Constructors

Constructor and Description
AggregateWordHistogram()

Method Summary

Methods

Modifier and Type	Method and 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

AggregateWordHistogram

public AggregateWordHistogram()

Method Detail

main

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

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.