org.apache.accumulo.examples.simple.filedata

Class CharacterHistogram

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.accumulo.examples.simple.filedata.CharacterHistogram

All Implemented Interfaces:

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

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

A MapReduce that computes a histogram of byte frequency for each file and stores the histogram alongside the file data. The ChunkInputFormat is used to read the file data from Accumulo. See docs/examples/README.filedata for instructions.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CharacterHistogram.HistMapper

Field Summary

Fields

Modifier and Type	Field and Description
static String	VIS

Constructor Summary

Constructors

Constructor and Description
CharacterHistogram()

Method Summary

Methods

Modifier and Type	Method and Description
static void	main(String[] args)
int	run(String[] args)

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

VIS

public static final String VIS

See Also:

Constant Field Values

Constructor Detail

CharacterHistogram

public CharacterHistogram()

Method Detail

main

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

Throws:

Exception

run

public int run(String[] args)
        throws Exception

Specified by:

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

Throws:

Exception