org.apache.mahout.math.hadoop

Class MatrixMultiplicationJob.MatrixMultiplicationReducer

java.lang.Object

org.apache.hadoop.mapred.MapReduceBase

org.apache.mahout.math.hadoop.MatrixMultiplicationJob.MatrixMultiplicationReducer

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.hadoop.mapred.JobConfigurable, org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.IntWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable>

Enclosing class:

MatrixMultiplicationJob

public static class MatrixMultiplicationJob.MatrixMultiplicationReducer
extends org.apache.hadoop.mapred.MapReduceBase
implements org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.IntWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable>

Constructor Summary

Constructors

Constructor and Description
MatrixMultiplicationReducer()

Method Summary

Modifier and Type	Method and Description
void	reduce(org.apache.hadoop.io.IntWritable rowNum, Iterator<VectorWritable> it, org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.IntWritable,VectorWritable> out, org.apache.hadoop.mapred.Reporter reporter)

Methods inherited from class org.apache.hadoop.mapred.MapReduceBase

close, configure

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.mapred.JobConfigurable

configure

Methods inherited from interface java.io.Closeable

close

Constructor Detail

MatrixMultiplicationReducer

public MatrixMultiplicationReducer()

Method Detail

reduce

public void reduce(org.apache.hadoop.io.IntWritable rowNum,
                   Iterator<VectorWritable> it,
                   org.apache.hadoop.mapred.OutputCollector<org.apache.hadoop.io.IntWritable,VectorWritable> out,
                   org.apache.hadoop.mapred.Reporter reporter)
            throws IOException

Specified by:

reduce in interface org.apache.hadoop.mapred.Reducer<org.apache.hadoop.io.IntWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable>

Throws:

IOException