org.apache.mahout.cf.taste.hadoop.als

Class SolveImplicitFeedbackMapper

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<K1,V1,K2,V2>

org.apache.mahout.cf.taste.hadoop.als.SharingMapper<org.apache.hadoop.io.IntWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable,ImplicitFeedbackAlternatingLeastSquaresSolver>

org.apache.mahout.cf.taste.hadoop.als.SolveImplicitFeedbackMapper

public class SolveImplicitFeedbackMapper
extends SharingMapper<org.apache.hadoop.io.IntWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable,ImplicitFeedbackAlternatingLeastSquaresSolver>

Solving mapper that can be safely executed using multiple threads

Nested Class Summary

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

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

Constructors

Constructor and Description
SolveImplicitFeedbackMapper()

Method Summary

Modifier and Type	Method and Description
protected void	map(org.apache.hadoop.io.IntWritable userOrItemID, VectorWritable ratingsWritable, org.apache.hadoop.mapreduce.Mapper.Context ctx)

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

cleanup, run, setup

Methods inherited from class java.lang.Object

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

Constructor Detail

SolveImplicitFeedbackMapper

public SolveImplicitFeedbackMapper()

Method Detail

map

protected void map(org.apache.hadoop.io.IntWritable userOrItemID,
                   VectorWritable ratingsWritable,
                   org.apache.hadoop.mapreduce.Mapper.Context ctx)
            throws IOException,
                   InterruptedException

Overrides:

map in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable>

Throws:

IOException

InterruptedException