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

Class MultithreadedSharingMapper<K1,V1,K2,V2>

java.lang.Object

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

org.apache.hadoop.mapreduce.lib.map.MultithreadedMapper<K1,V1,K2,V2>

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

Type Parameters:

K1 -

V1 -

K2 -

V2 -

public class MultithreadedSharingMapper<K1,V1,K2,V2>
extends org.apache.hadoop.mapreduce.lib.map.MultithreadedMapper<K1,V1,K2,V2>

Multithreaded Mapper for SharingMappers. Will call setupSharedInstance() once in the controlling thread before executing the mappers using a thread pool.

Nested Class Summary

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

org.apache.hadoop.mapreduce.Mapper.Context

Field Summary

Fields inherited from class org.apache.hadoop.mapreduce.lib.map.MultithreadedMapper

MAP_CLASS, NUM_THREADS

Constructor Summary

Constructors

Constructor and Description
MultithreadedSharingMapper()

Method Summary

Modifier and Type	Method and Description
void	run(org.apache.hadoop.mapreduce.Mapper.Context ctx)

Methods inherited from class org.apache.hadoop.mapreduce.lib.map.MultithreadedMapper

getMapperClass, getNumberOfThreads, setMapperClass, setNumberOfThreads

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

cleanup, map, setup

Methods inherited from class java.lang.Object

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

Constructor Detail

MultithreadedSharingMapper

public MultithreadedSharingMapper()

Method Detail

run

public void run(org.apache.hadoop.mapreduce.Mapper.Context ctx)
         throws IOException,
                InterruptedException

Overrides:

run in class org.apache.hadoop.mapreduce.lib.map.MultithreadedMapper<K1,V1,K2,V2>

Throws:

IOException

InterruptedException