de.hpi.fgis.voidgen.hadoop.tasks.clustering1
Class Task2ClusteringReducer

java.lang.Object
  extended by org.apache.hadoop.mapreduce.Reducer<StringStringPair,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>
      extended by de.hpi.fgis.voidgen.hadoop.tasks.clustering1.Task2ClusteringReducer

public class Task2ClusteringReducer
extends org.apache.hadoop.mapreduce.Reducer<StringStringPair,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>

Aggregates over all keys and outputs each unique key once.

Input

Output

Author:
Dandy Fenz, Hasso Plattner Institute at University of Potsdam, Germany, Matthias Pohl, Hasso Plattner Institute at University of Potsdam, Germany, Johannes Gosda, Hasso Plattner Institute at University of Potsdam, Germany

Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer
org.apache.hadoop.mapreduce.Reducer.Context
 
Constructor Summary
Task2ClusteringReducer()
           
 
Method Summary
 void reduce(StringStringPair 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
 

Constructor Detail

Task2ClusteringReducer

public Task2ClusteringReducer()
Method Detail

reduce

public void reduce(StringStringPair 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<StringStringPair,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.Text>
Throws:
java.io.IOException
java.lang.InterruptedException