eu.stratosphere.example.java.graph

Class PageRankBasic.BuildOutgoingEdgeList

java.lang.Object

eu.stratosphere.api.common.functions.AbstractFunction

eu.stratosphere.api.java.functions.GroupReduceFunction<Tuple2<Long,Long>,Tuple2<Long,Long[]>>

eu.stratosphere.example.java.graph.PageRankBasic.BuildOutgoingEdgeList

All Implemented Interfaces:

Function, GenericCombine<Tuple2<Long,Long>>, GenericGroupReduce<Tuple2<Long,Long>,Tuple2<Long,Long[]>>, Serializable

Enclosing class:

PageRankBasic

public static final class PageRankBasic.BuildOutgoingEdgeList
extends GroupReduceFunction<Tuple2<Long,Long>,Tuple2<Long,Long[]>>

A reduce function that takes a sequence of edges and builds the adjacency list for the vertex where the edges originate. Run as a preprocessing step.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class eu.stratosphere.api.java.functions.GroupReduceFunction

GroupReduceFunction.Combinable

Constructor Summary

Constructors

Constructor and Description
PageRankBasic.BuildOutgoingEdgeList()

Method Summary

Methods

Modifier and Type	Method and Description
void	reduce(Iterator<Tuple2<Long,Long>> values, Collector<Tuple2<Long,Long[]>> out)

Methods inherited from class eu.stratosphere.api.java.functions.GroupReduceFunction

combine

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

PageRankBasic.BuildOutgoingEdgeList

public PageRankBasic.BuildOutgoingEdgeList()

Method Detail

reduce

public void reduce(Iterator<Tuple2<Long,Long>> values,
          Collector<Tuple2<Long,Long[]>> out)

Specified by:

reduce in interface GenericGroupReduce<Tuple2<Long,Long>,Tuple2<Long,Long[]>>

Specified by:

reduce in class GroupReduceFunction<Tuple2<Long,Long>,Tuple2<Long,Long[]>>