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org.apache.gora.examples.mapreduce
Class WordCount

java.lang.Object
  org.apache.hadoop.conf.Configured
      org.apache.gora.examples.mapreduce.WordCount

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

public class WordCount
extends org.apache.hadoop.conf.Configured
implements org.apache.hadoop.util.Tool

Classic word count example in Gora.

Nested Class Summary

static class	WordCount.TokenizerMapper TokenizerMapper takes <String, WebPage> pairs as obtained from the input DataStore, and tokenizes the content via WebPage.getContent().
static class	WordCount.WordCountReducer

Constructor Summary

WordCount()

WordCount(org.apache.hadoop.conf.Configuration conf)

Method Summary

org.apache.hadoop.mapreduce.Job	createJob(DataStore<String,WebPage> inStore, Query<String,WebPage> query, DataStore<String,TokenDatum> outStore) Creates and returns the Job for submitting to Hadoop mapreduce.
static void	main(String[] args)
int	run(String[] args)
int	wordCount(DataStore<String,WebPage> inStore, DataStore<String,TokenDatum> outStore)

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

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.conf.Configurable

getConf, setConf

Constructor Detail

WordCount

public WordCount()

WordCount

public WordCount(org.apache.hadoop.conf.Configuration conf)

Method Detail

createJob

public org.apache.hadoop.mapreduce.Job createJob(DataStore<String,WebPage> inStore,
                                                 Query<String,WebPage> query,
                                                 DataStore<String,TokenDatum> outStore)
                                          throws IOException

Creates and returns the Job for submitting to Hadoop mapreduce.

Parameters:

inStore -

query -

Returns:

Throws:

IOException

wordCount

public int wordCount(DataStore<String,WebPage> inStore,
                     DataStore<String,TokenDatum> outStore)
              throws IOException,
                     InterruptedException,
                     ClassNotFoundException

Throws:

IOException

InterruptedException

ClassNotFoundException

run

public int run(String[] args)
        throws Exception

Specified by:

run in interface org.apache.hadoop.util.Tool

Throws:

Exception

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception