org.apache.mahout.vectorizer.common
Class PartialVectorMergeReducer

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.WritableComparable<?>,VectorWritable,org.apache.hadoop.io.WritableComparable<?>,VectorWritable>
      extended by org.apache.mahout.vectorizer.common.PartialVectorMergeReducer

public class PartialVectorMergeReducer
extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.WritableComparable<?>,VectorWritable,org.apache.hadoop.io.WritableComparable<?>,VectorWritable>

Merges partial vectors in to a full sparse vector


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer
org.apache.hadoop.mapreduce.Reducer.Context
 
Constructor Summary
PartialVectorMergeReducer()
           
 
Method Summary
protected  void reduce(org.apache.hadoop.io.WritableComparable<?> key, java.lang.Iterable<VectorWritable> values, org.apache.hadoop.mapreduce.Reducer.Context context)
           
protected  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

PartialVectorMergeReducer

public PartialVectorMergeReducer()
Method Detail

reduce

protected void reduce(org.apache.hadoop.io.WritableComparable<?> key,
                      java.lang.Iterable<VectorWritable> values,
                      org.apache.hadoop.mapreduce.Reducer.Context context)
               throws java.io.IOException,
                      java.lang.InterruptedException
Overrides:
reduce in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.WritableComparable<?>,VectorWritable,org.apache.hadoop.io.WritableComparable<?>,VectorWritable>
Throws:
java.io.IOException
java.lang.InterruptedException

setup

protected void setup(org.apache.hadoop.mapreduce.Reducer.Context context)
              throws java.io.IOException,
                     java.lang.InterruptedException
Overrides:
setup in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.WritableComparable<?>,VectorWritable,org.apache.hadoop.io.WritableComparable<?>,VectorWritable>
Throws:
java.io.IOException
java.lang.InterruptedException


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