org.apache.mahout.clustering.streaming.mapreduce

Class StreamingKMeansReducer

java.lang.Object

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

org.apache.mahout.clustering.streaming.mapreduce.StreamingKMeansReducer

public class StreamingKMeansReducer
extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.IntWritable,CentroidWritable,org.apache.hadoop.io.IntWritable,CentroidWritable>

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
StreamingKMeansReducer()

Method Summary

Modifier and Type	Method and Description
static List<Centroid>	centroidWritablesToList(Iterable<CentroidWritable> centroids)
static Iterable<Vector>	getBestCentroids(List<Centroid> centroids, org.apache.hadoop.conf.Configuration conf)
void	reduce(org.apache.hadoop.io.IntWritable key, Iterable<CentroidWritable> centroids, org.apache.hadoop.mapreduce.Reducer.Context context)
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

StreamingKMeansReducer

public StreamingKMeansReducer()

Method Detail

setup

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

Overrides:

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

reduce

public void reduce(org.apache.hadoop.io.IntWritable key,
                   Iterable<CentroidWritable> centroids,
                   org.apache.hadoop.mapreduce.Reducer.Context context)
            throws IOException,
                   InterruptedException

Overrides:

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

Throws:

IOException

InterruptedException

centroidWritablesToList

public static List<Centroid> centroidWritablesToList(Iterable<CentroidWritable> centroids)

getBestCentroids

public static Iterable<Vector> getBestCentroids(List<Centroid> centroids,
                                                org.apache.hadoop.conf.Configuration conf)