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

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<K1,V1,K2,V2>
      extended by org.apache.mahout.cf.taste.hadoop.als.SharingMapper<org.apache.hadoop.io.IntWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable,OpenIntObjectHashMap<Vector>>
          extended by org.apache.mahout.cf.taste.hadoop.als.SolveExplicitFeedbackMapper

public class SolveExplicitFeedbackMapper
extends SharingMapper<org.apache.hadoop.io.IntWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable,OpenIntObjectHashMap<Vector>>

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
SolveExplicitFeedbackMapper()
           
 
Method Summary
protected  void map(org.apache.hadoop.io.IntWritable userOrItemID, VectorWritable ratingsWritable, org.apache.hadoop.mapreduce.Mapper.Context ctx)
           
protected  void setup(org.apache.hadoop.mapreduce.Mapper.Context ctx)
           
 
Methods inherited from class org.apache.hadoop.mapreduce.Mapper
cleanup, run
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SolveExplicitFeedbackMapper

public SolveExplicitFeedbackMapper()
Method Detail

setup

protected void setup(org.apache.hadoop.mapreduce.Mapper.Context ctx)
              throws IOException,
                     InterruptedException
Overrides:
setup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.IntWritable,VectorWritable,org.apache.hadoop.io.IntWritable,VectorWritable>
Throws:
IOException
InterruptedException

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


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