org.apache.mahout.cf.taste.example.email

Class MailToRecReducer

java.lang.Object

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

org.apache.mahout.cf.taste.example.email.MailToRecReducer

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

Nested Class Summary

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

org.apache.hadoop.mapreduce.Reducer.Context

Field Summary

Fields

Modifier and Type	Field and Description
static String	USE_COUNTS_PREFERENCE We can either ignore how many times the user interacted (boolean) or output the number of times they interacted.

Constructor Summary

Constructors

Constructor and Description
MailToRecReducer()

Method Summary

Methods

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

Field Detail

USE_COUNTS_PREFERENCE

public static final String USE_COUNTS_PREFERENCE

We can either ignore how many times the user interacted (boolean) or output the number of times they interacted.

See Also:

Constant Field Values

Constructor Detail

MailToRecReducer

public MailToRecReducer()

Method Detail

setup

protected 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.Text,org.apache.hadoop.io.LongWritable,org.apache.hadoop.io.Text,org.apache.hadoop.io.NullWritable>

Throws:

IOException

InterruptedException

reduce

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

Overrides:

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

Throws:

IOException

InterruptedException