edu.umd.cloud9.example.simple
Class DemoWordCountTuple2

java.lang.Object
  org.apache.hadoop.conf.Configured
      edu.umd.cloud9.example.simple.DemoWordCountTuple2

All Implemented Interfaces:

Configurable, Tool

public class DemoWordCountTuple2
extends Configured
implements Tool

Another demo that illustrates use of Tuple objects as intermediate keys in a MapReduce job. This Hadoop Tool takes the following command-line arguments:

• [input-path] input path
• [output-path] output path
• [num-reducers] number of reducers

Input comes from a flat text collection packed into a SequenceFile with DemoPackTuples2; the tuples have complex internal structure. Output shows the count of words on even- and odd-length lines. This demo does exactly the same thing as DemoWordCountTuple1.

Author:

Jimmy Lin

See Also:

DemoWordCountTuple1, DemoWordCountJSON

Constructor Summary

DemoWordCountTuple2()
Creates an instance of this tool.

Method Summary

static void	main(String[] args) Dispatches command-line arguments to the tool via the ToolRunner.
int	run(String[] args) Runs this tool.

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

Constructor Detail

DemoWordCountTuple2

public DemoWordCountTuple2()

Creates an instance of this tool.

Method Detail

run

public int run(String[] args)
        throws Exception

Runs this tool.

Specified by:

run in interface Tool

Throws:

Exception

main

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

Dispatches command-line arguments to the tool via the ToolRunner.

Throws:

Exception