gov.llnl.ontology.mapreduce.stats
Class TokenCountMR

java.lang.Object
  org.apache.hadoop.conf.Configured
      gov.llnl.ontology.mapreduce.CorpusTableMR
          gov.llnl.ontology.mapreduce.stats.TokenCountMR

All Implemented Interfaces:

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

public class TokenCountMR
extends CorpusTableMR

A Map/Reduce job that counts the number of occurrences for each token in a corpus.

Author:

Keith Stevens

Nested Class Summary

static class

TokenCountMR.TokenCountMapper The TableMapper responsible for most of the work.

Nested classes/interfaces inherited from class gov.llnl.ontology.mapreduce.CorpusTableMR

CorpusTableMR.CorpusTableMapper<K,V>

Field Summary

static String

ABOUT The job description used in help text.

Fields inherited from class gov.llnl.ontology.mapreduce.CorpusTableMR

CONF_PREFIX, TABLE

Constructor Summary

TokenCountMR()

Method Summary

protected String	jobName() Returns a descriptive job name for this map reduce task.
static void	main(String[] args) Runs the TokenCountMR.
protected Class	mapperClass() Returns the Class object for the Mapper task.
protected Class	mapperKeyClass() Returns the Class object for the Mapper Value of this task.
protected Class	mapperValueClass() Returns the Class object for the Mapper Value of this task.
protected void	setupReducer(String tableName, org.apache.hadoop.mapreduce.Job job, MRArgOptions options) Sets up the Reducer for this job.
protected void	validateOptions(MRArgOptions options) Returns true if the MRArgOptions contains a valid value for each requried option.

Methods inherited from class gov.llnl.ontology.mapreduce.CorpusTableMR

addOptions, run, setupConfiguration

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

Field Detail

ABOUT

public static final String ABOUT

The job description used in help text.

See Also:

Constant Field Values

Constructor Detail

TokenCountMR

public TokenCountMR()

Method Detail

main

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

Runs the TokenCountMR.

Throws:

Exception

validateOptions

protected void validateOptions(MRArgOptions options)

Returns true if the MRArgOptions contains a valid value for each requried option. By default, this does no validation.

Overrides:

validateOptions in class CorpusTableMR

jobName

protected String jobName()

Returns a descriptive job name for this map reduce task.

Overrides:

jobName in class CorpusTableMR

mapperClass

protected Class mapperClass()

Returns the Class object for the Mapper task.

Specified by:

mapperClass in class CorpusTableMR

mapperKeyClass

protected Class mapperKeyClass()

Returns the Class object for the Mapper Value of this task.

Overrides:

mapperKeyClass in class CorpusTableMR

mapperValueClass

protected Class mapperValueClass()

Returns the Class object for the Mapper Value of this task.

Overrides:

mapperValueClass in class CorpusTableMR

setupReducer

protected void setupReducer(String tableName,
                            org.apache.hadoop.mapreduce.Job job,
                            MRArgOptions options)

Sets up the Reducer for this job.

Overrides:

setupReducer in class CorpusTableMR