org.apache.mahout.math.hadoop

Class TimesSquaredJob.VectorSummingReducer

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.NullWritable,VectorWritable,org.apache.hadoop.io.NullWritable,VectorWritable>

org.apache.mahout.math.hadoop.TimesSquaredJob.VectorSummingReducer

Enclosing class:

TimesSquaredJob

public static class TimesSquaredJob.VectorSummingReducer
extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.NullWritable,VectorWritable,org.apache.hadoop.io.NullWritable,VectorWritable>

Nested Class Summary

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

org.apache.hadoop.mapreduce.Reducer.Context

Constructor Summary

Constructors

Constructor and Description
VectorSummingReducer()

Method Summary

Modifier and Type	Method and Description
protected void	reduce(org.apache.hadoop.io.NullWritable key, Iterable<VectorWritable> vectors, org.apache.hadoop.mapreduce.Reducer.Context ctx)
protected void	setup(org.apache.hadoop.mapreduce.Reducer.Context ctx)

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

cleanup, run

Methods inherited from class java.lang.Object

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

Constructor Detail

VectorSummingReducer

public VectorSummingReducer()

Method Detail

setup

protected void setup(org.apache.hadoop.mapreduce.Reducer.Context ctx)
              throws IOException,
                     InterruptedException

Overrides:

setup in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.NullWritable,VectorWritable,org.apache.hadoop.io.NullWritable,VectorWritable>

Throws:

IOException

InterruptedException

reduce

protected void reduce(org.apache.hadoop.io.NullWritable key,
                      Iterable<VectorWritable> vectors,
                      org.apache.hadoop.mapreduce.Reducer.Context ctx)
               throws IOException,
                      InterruptedException

Overrides:

reduce in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.NullWritable,VectorWritable,org.apache.hadoop.io.NullWritable,VectorWritable>

Throws:

IOException

InterruptedException