de.hpi.fgis.voidgen.hadoop.tasks.inputstatistics
Class Task1Combiner
java.lang.Object
org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.NullWritable>
de.hpi.fgis.voidgen.hadoop.tasks.inputstatistics.Task1Combiner
public class Task1Combiner
- extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.Text,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.NullWritable>
Combiner that outputs each distinct key once.
- Author:
- Johannes Gosda, Hasso Plattner Institute at University of Potsdam, Germany
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer |
org.apache.hadoop.mapreduce.Reducer.Context |
Method Summary |
void |
reduce(org.apache.hadoop.io.Text key,
java.lang.Iterable<org.apache.hadoop.io.NullWritable> 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 |
Task1Combiner
public Task1Combiner()
reduce
public void reduce(org.apache.hadoop.io.Text key,
java.lang.Iterable<org.apache.hadoop.io.NullWritable> 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.Text,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.NullWritable>
- Throws:
java.io.IOException
java.lang.InterruptedException