org.apache.hadoop.examples

Class WordMedian.WordMedianReducer

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<IntWritable,IntWritable,IntWritable,IntWritable>

org.apache.hadoop.examples.WordMedian.WordMedianReducer

Enclosing class:

WordMedian

public static class WordMedian.WordMedianReducer
extends Reducer<IntWritable,IntWritable,IntWritable,IntWritable>

Performs integer summation of all the values for each key.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer

Reducer.Context

Constructor Summary

Constructors

Constructor and Description
WordMedian.WordMedianReducer()

Method Summary

Methods

Modifier and Type	Method and Description
void	reduce(IntWritable key, Iterable<IntWritable> values, Reducer.Context context) Sums all the individual values within the iterator and writes them to the same key.

Methods inherited from class org.apache.hadoop.mapreduce.Reducer

cleanup, run, setup

Methods inherited from class java.lang.Object

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

Constructor Detail

WordMedian.WordMedianReducer

public WordMedian.WordMedianReducer()

Method Detail

reduce

public void reduce(IntWritable key,
          Iterable<IntWritable> values,
          Reducer.Context context)
            throws IOException,
                   InterruptedException

Sums all the individual values within the iterator and writes them to the same key.

Overrides:

reduce in class Reducer<IntWritable,IntWritable,IntWritable,IntWritable>

Parameters:

key - This will be a length of a word that was read.

values - This will be an iterator of all the values associated with that key.

Throws:

IOException

InterruptedException