org.apache.mahout.math.hadoop.stochasticsvd
Class BtJob.OuterProductCombiner

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Writable,SparseRowBlockWritable,org.apache.hadoop.io.Writable,SparseRowBlockWritable>
      extended by org.apache.mahout.math.hadoop.stochasticsvd.BtJob.OuterProductCombiner
Enclosing class:
BtJob

public static class BtJob.OuterProductCombiner
extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Writable,SparseRowBlockWritable,org.apache.hadoop.io.Writable,SparseRowBlockWritable>


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer
org.apache.hadoop.mapreduce.Reducer.Context
 
Field Summary
protected  SparseRowBlockWritable accum
           
protected  int blockHeight
           
protected  Deque<Closeable> closeables
           
 
Constructor Summary
BtJob.OuterProductCombiner()
           
 
Method Summary
protected  void cleanup(org.apache.hadoop.mapreduce.Reducer.Context context)
           
protected  void reduce(org.apache.hadoop.io.Writable key, Iterable<SparseRowBlockWritable> 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
run
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

accum

protected final SparseRowBlockWritable accum

closeables

protected final Deque<Closeable> closeables

blockHeight

protected int blockHeight
Constructor Detail

BtJob.OuterProductCombiner

public BtJob.OuterProductCombiner()
Method Detail

setup

protected void setup(org.apache.hadoop.mapreduce.Reducer.Context context)
              throws IOException,
                     InterruptedException
Overrides:
setup in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Writable,SparseRowBlockWritable,org.apache.hadoop.io.Writable,SparseRowBlockWritable>
Throws:
IOException
InterruptedException

reduce

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

cleanup

protected void cleanup(org.apache.hadoop.mapreduce.Reducer.Context context)
                throws IOException,
                       InterruptedException
Overrides:
cleanup in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Writable,SparseRowBlockWritable,org.apache.hadoop.io.Writable,SparseRowBlockWritable>
Throws:
IOException
InterruptedException


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