eu.stratosphere.example.java.relational

Class WebLogAnalysis.AntiJoinVisits

java.lang.Object

eu.stratosphere.api.common.functions.AbstractFunction

eu.stratosphere.api.java.functions.CoGroupFunction<Tuple3<Integer,String,Integer>,Tuple1<String>,Tuple3<Integer,String,Integer>>

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

All Implemented Interfaces:

Function, GenericCoGrouper<Tuple3<Integer,String,Integer>,Tuple1<String>,Tuple3<Integer,String,Integer>>, Serializable

Enclosing class:

WebLogAnalysis

public static class WebLogAnalysis.AntiJoinVisits
extends CoGroupFunction<Tuple3<Integer,String,Integer>,Tuple1<String>,Tuple3<Integer,String,Integer>>

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
AntiJoinVisits()

Method Summary

Modifier and Type	Method and Description
void	coGroup(Iterator<Tuple3<Integer,String,Integer>> ranks, Iterator<Tuple1<String>> visits, Collector<Tuple3<Integer,String,Integer>> out) If the visit iterator is empty, all pairs of the rank iterator are emitted.

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

AntiJoinVisits

public AntiJoinVisits()

Method Detail

coGroup

public void coGroup(Iterator<Tuple3<Integer,String,Integer>> ranks,
                    Iterator<Tuple1<String>> visits,
                    Collector<Tuple3<Integer,String,Integer>> out)

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

Specified by:

coGroup in interface GenericCoGrouper<Tuple3<Integer,String,Integer>,Tuple1<String>,Tuple3<Integer,String,Integer>>

Specified by:

coGroup in class CoGroupFunction<Tuple3<Integer,String,Integer>,Tuple1<String>,Tuple3<Integer,String,Integer>>