org.apache.hadoop.examples
Class AggregateWordCount

java.lang.Object
  org.apache.hadoop.examples.AggregateWordCount

public class AggregateWordCount
extends 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

static class

AggregateWordCount.WordCountPlugInClass

Constructor Summary

AggregateWordCount()

Method Summary

static void

main(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(String[] args)
                 throws IOException

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

Throws:

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