org.openimaj.hadoop.tools.twitter.token.mode.dfidf

Class CountTweetsInTimeperiod.TimeIndexReducer

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable>

org.openimaj.hadoop.tools.twitter.token.mode.dfidf.CountTweetsInTimeperiod.TimeIndexReducer

Enclosing class:

CountTweetsInTimeperiod

public static class CountTweetsInTimeperiod.TimeIndexReducer
extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable>

Identical to the IdentityReducer but constructs a time index found in CountTweetsInTimeperiod.TIMEINDEX_FILE

Author:

Sina Samangooei (ss@ecs.soton.ac.uk)

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer

org.apache.hadoop.mapreduce.Reducer.Context

Constructor Summary

Constructors

Constructor and Description
TimeIndexReducer()

Method Summary

Modifier and Type	Method and Description
protected void	cleanup(org.apache.hadoop.mapreduce.Reducer.Context context)
protected void	reduce(org.apache.hadoop.io.LongWritable time, Iterable<org.apache.hadoop.io.BytesWritable> values, org.apache.hadoop.mapreduce.Reducer.Context context)

Methods inherited from class org.apache.hadoop.mapreduce.Reducer

run, setup

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TimeIndexReducer

public TimeIndexReducer()

Method Detail

reduce

protected void reduce(org.apache.hadoop.io.LongWritable time,
                      Iterable<org.apache.hadoop.io.BytesWritable> values,
                      org.apache.hadoop.mapreduce.Reducer.Context context)
               throws IOException,
                      InterruptedException

Overrides:

reduce in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable>

Throws:

IOException

InterruptedException

cleanup

protected void cleanup(org.apache.hadoop.mapreduce.Reducer.Context context)
                throws IOException,
                       InterruptedException

Overrides:

cleanup in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable>

Throws:

IOException

InterruptedException