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

static class

AggregateWordHistogram.AggregateWordHistogramPlugin

Constructor Summary

AggregateWordHistogram()

Method Summary

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.