edu.umd.cloud9.demo
Class DemoWordCountJSON

java.lang.Object
  edu.umd.cloud9.demo.DemoWordCountJSON

public class DemoWordCountJSON
extends Object

Demo that illustrates use of JSONObjectWritable objects as intermediate keys in a MapReduce job. Input comes from the Bible+Shakespeare sample collection, packed into a SequenceFile with DemoPackJSON. Output shows the count of words on even- and odd-length lines.

Format of the output SequenceFile: The key is a JSON object. The field named "Token" contains a word and the field named "EvenOrOdd" indicates whether the word was found on a even-length or odd-length line. The value is the count of the word on either even- or odd-length lines.

See Also:

DemoWordCountTuple1, DemoWordCountTuple2

Nested Class Summary

static class

DemoWordCountJSON.MyKey

Method Summary

static void

main(String[] args) Runs the demo.

Methods inherited from class java.lang.Object

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

Method Detail

main

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

Runs the demo.

Throws:

IOException