org.openimaj.hadoop.tools.twitter.token.outputmode.sparsecsv

Class ReduceValuesByTime

java.lang.Object

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

org.openimaj.hadoop.tools.twitter.token.outputmode.sparsecsv.ReduceValuesByTime

public class ReduceValuesByTime
extends org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text>

Writes each word,count

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
ReduceValuesByTime() construct the reduce instance, do nothing

Method Summary

Modifier and Type	Method and Description
protected static void	loadOptions(org.apache.hadoop.mapreduce.Reducer.Context context)
void	reduce(org.apache.hadoop.io.LongWritable timeslot, Iterable<org.apache.hadoop.io.BytesWritable> manylines, org.apache.hadoop.mapreduce.Reducer.Context context)
void	setup(org.apache.hadoop.mapreduce.Reducer.Context context)

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

cleanup, run

Methods inherited from class java.lang.Object

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

Constructor Detail

ReduceValuesByTime

public ReduceValuesByTime()

construct the reduce instance, do nothing

Method Detail

setup

public void setup(org.apache.hadoop.mapreduce.Reducer.Context context)
           throws IOException,
                  InterruptedException

Overrides:

setup in class org.apache.hadoop.mapreduce.Reducer<org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.BytesWritable,org.apache.hadoop.io.NullWritable,org.apache.hadoop.io.Text>

Throws:

IOException

InterruptedException

loadOptions

protected static void loadOptions(org.apache.hadoop.mapreduce.Reducer.Context context)
                           throws IOException

Throws:

IOException

reduce

public void reduce(org.apache.hadoop.io.LongWritable timeslot,
                   Iterable<org.apache.hadoop.io.BytesWritable> manylines,
                   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.NullWritable,org.apache.hadoop.io.Text>

Throws:

IOException

InterruptedException