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oracle.hadoop.balancer.examples.invindx
Class InvertedIndexMapreduce

java.lang.Object
org.apache.hadoop.conf.Configured
oracle.hadoop.balancer.examples.invindx.InvertedIndexMapreduce

All Implemented Interfaces:

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

public class InvertedIndexMapreduce

extends org.apache.hadoop.conf.Configured

implements org.apache.hadoop.util.Tool

Inverted Index with Mapreduce API. It contains mapper class, reducer class and a driver.

Nested Class Summary

static class	InvertedIndexMapreduce.InvertedIndexMapper Inverted Index mapper class for TextInputFormat and FileSplit This class uses the file name obtained from FileSplit as the location of the word, and the value of the LongWritable key of TextInputFormat as the offset of the word in that file.
static class	InvertedIndexMapreduce.InvertedIndexReducer The inverted index reducer class for mapreduce API

Field Summary

static boolean	DEFAULT_SECONDARY_SORT
static java.lang.String	PROPERTY_SECONDARY_SORT

Constructor Summary

InvertedIndexMapreduce()

Method Summary

static void	main(java.lang.String[] args)
int	run(java.lang.String[] args)

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

getConf, setConf

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.conf.Configurable

getConf, setConf

Field Detail

DEFAULT_SECONDARY_SORT

public static final boolean DEFAULT_SECONDARY_SORT

See Also:

Constant Field Values

PROPERTY_SECONDARY_SORT

public static final java.lang.String PROPERTY_SECONDARY_SORT

See Also:

Constant Field Values

Constructor Detail

InvertedIndexMapreduce

public InvertedIndexMapreduce()

Method Detail

main

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

Throws:

java.lang.Exception

run

public int run(java.lang.String[] args)
        throws java.lang.Exception

Specified by:

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

Throws:

java.lang.Exception

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