org.apache.mahout.cf.taste.hadoop.als

Class SharingMapper<K1,V1,K2,V2,S>

java.lang.Object

org.apache.hadoop.mapreduce.Mapper<K1,V1,K2,V2>

org.apache.mahout.cf.taste.hadoop.als.SharingMapper<K1,V1,K2,V2,S>

Type Parameters:

K1 -

V1 -

K2 -

V2 -

Direct Known Subclasses:

PredictionMapper, SolveExplicitFeedbackMapper, SolveImplicitFeedbackMapper

public abstract class SharingMapper<K1,V1,K2,V2,S>
extends org.apache.hadoop.mapreduce.Mapper<K1,V1,K2,V2>

Mapper class to be used by MultithreadedSharingMapper. Offers "global" before() and after() methods that will typically be used to set up static variables. Suitable for mappers that need large, read-only in-memory data to operate.

Nested Class Summary

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

org.apache.hadoop.mapreduce.Mapper.Context

Constructor Summary

Constructors

Constructor and Description
SharingMapper()

Method Summary

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

cleanup, map, run, setup

Methods inherited from class java.lang.Object

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

Constructor Detail

SharingMapper

public SharingMapper()