org.apache.mahout.utils
Class SplitInputJob.SplitInputMapper

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable<?>,org.apache.hadoop.io.Writable,org.apache.hadoop.io.WritableComparable<?>,org.apache.hadoop.io.Writable>
      extended by org.apache.mahout.utils.SplitInputJob.SplitInputMapper
Enclosing class:
SplitInputJob

public static class SplitInputJob.SplitInputMapper
extends org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable<?>,org.apache.hadoop.io.Writable,org.apache.hadoop.io.WritableComparable<?>,org.apache.hadoop.io.Writable>

Mapper which downsamples the input by downsamplingFactor


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper
org.apache.hadoop.mapreduce.Mapper.Context
 
Constructor Summary
SplitInputJob.SplitInputMapper()
           
 
Method Summary
 void run(org.apache.hadoop.mapreduce.Mapper.Context context)
          Only run map() for one out of every downsampleFactor inputs
 void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
           
 
Methods inherited from class org.apache.hadoop.mapreduce.Mapper
cleanup, map
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SplitInputJob.SplitInputMapper

public SplitInputJob.SplitInputMapper()
Method Detail

setup

public void setup(org.apache.hadoop.mapreduce.Mapper.Context context)
Overrides:
setup in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable<?>,org.apache.hadoop.io.Writable,org.apache.hadoop.io.WritableComparable<?>,org.apache.hadoop.io.Writable>

run

public void run(org.apache.hadoop.mapreduce.Mapper.Context context)
         throws IOException,
                InterruptedException
Only run map() for one out of every downsampleFactor inputs

Overrides:
run in class org.apache.hadoop.mapreduce.Mapper<org.apache.hadoop.io.WritableComparable<?>,org.apache.hadoop.io.Writable,org.apache.hadoop.io.WritableComparable<?>,org.apache.hadoop.io.Writable>
Throws:
IOException
InterruptedException


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