org.apache.mahout.utils
Class SplitInputJob.SplitInputMapper
java.lang.Object
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>
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 classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper |
org.apache.hadoop.mapreduce.Mapper.Context |
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 |
SplitInputJob.SplitInputMapper
public SplitInputJob.SplitInputMapper()
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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