org.apache.mahout.fpm.pfpgrowth
Class ParallelFPGrowthCombiner

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.IntWritable,TransactionTree,org.apache.hadoop.io.IntWritable,TransactionTree>
      extended by org.apache.mahout.fpm.pfpgrowth.ParallelFPGrowthCombiner

public class ParallelFPGrowthCombiner
extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.IntWritable,TransactionTree,org.apache.hadoop.io.IntWritable,TransactionTree>

takes each group of dependent transactions and\ compacts it in a TransactionTree structure


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer
org.apache.hadoop.mapreduce.Reducer.Context
 
Constructor Summary
ParallelFPGrowthCombiner()
           
 
Method Summary
protected  void reduce(org.apache.hadoop.io.IntWritable key, Iterable<TransactionTree> values, org.apache.hadoop.mapreduce.Reducer.Context context)
           
 
Methods inherited from class org.apache.hadoop.mapreduce.Reducer
cleanup, run, setup
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

ParallelFPGrowthCombiner

public ParallelFPGrowthCombiner()
Method Detail

reduce

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


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