org.apache.mahout.clustering.topdown.postprocessor

Class ClusterOutputPostProcessorReducer

java.lang.Object

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

org.apache.mahout.clustering.topdown.postprocessor.ClusterOutputPostProcessorReducer

public class ClusterOutputPostProcessorReducer
extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.IntWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable>

Reducer for post processing cluster output.

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
ClusterOutputPostProcessorReducer()

Method Summary

Modifier and Type	Method and Description
protected void	reduce(org.apache.hadoop.io.IntWritable key, Iterable<VectorWritable> values, org.apache.hadoop.mapreduce.Reducer.Context context) The key is the remapped cluster id and the values contains the vectors in that cluster.
void	setup(org.apache.hadoop.mapreduce.Reducer.Context context)

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

ClusterOutputPostProcessorReducer

public ClusterOutputPostProcessorReducer()

Method Detail

setup

public void setup(org.apache.hadoop.mapreduce.Reducer.Context context)
           throws IOException

Overrides:

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

Throws:

IOException

reduce

protected void reduce(org.apache.hadoop.io.IntWritable key,
                      Iterable<VectorWritable> values,
                      org.apache.hadoop.mapreduce.Reducer.Context context)
               throws IOException,
                      InterruptedException

The key is the remapped cluster id and the values contains the vectors in that cluster.

Overrides:

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

Throws:

IOException

InterruptedException