eu.stratosphere.example.java.record.relational

Class WebLogAnalysis.AntiJoinVisits

java.lang.Object

eu.stratosphere.api.common.functions.AbstractFunction

eu.stratosphere.api.java.record.functions.CoGroupFunction

eu.stratosphere.example.java.record.relational.WebLogAnalysis.AntiJoinVisits

All Implemented Interfaces:

Function, GenericCoGrouper<Record,Record,Record>, Serializable

Enclosing class:

WebLogAnalysis

public static class WebLogAnalysis.AntiJoinVisits
extends CoGroupFunction
implements Serializable

CoGroupFunction that realizes an anti-join. If the first input does not provide any pairs, all pairs of the second input are emitted. Otherwise, no pair is emitted.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
WebLogAnalysis.AntiJoinVisits()

Method Summary

Methods

Modifier and Type	Method and Description
void	coGroup(Iterator<Record> ranks, Iterator<Record> visits, Collector<Record> out) If the visit iterator is empty, all pairs of the rank iterator are emitted.

Methods inherited from class eu.stratosphere.api.java.record.functions.CoGroupFunction

combineFirst, combineSecond

Methods inherited from class eu.stratosphere.api.common.functions.AbstractFunction

close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext

Methods inherited from class java.lang.Object

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

Methods inherited from interface eu.stratosphere.api.common.functions.Function

close, getRuntimeContext, open, setRuntimeContext

Constructor Detail

WebLogAnalysis.AntiJoinVisits

public WebLogAnalysis.AntiJoinVisits()

Method Detail

coGroup

public void coGroup(Iterator<Record> ranks,
           Iterator<Record> visits,
           Collector<Record> out)

If the visit iterator is empty, all pairs of the rank iterator are emitted. Otherwise, no pair is emitted. Output Format: 0: URL 1: RANK 2: AVG_DURATION

Specified by:

coGroup in interface GenericCoGrouper<Record,Record,Record>

Specified by:

coGroup in class CoGroupFunction