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 classes/interfaces inherited from class org.apache.hadoop.mapreduce.Mapper |
org.apache.hadoop.mapreduce.Mapper.Context |
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 |
SharingMapper
public SharingMapper()
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