org.apache.flink.examples.java.graph

Class PageRank.BuildOutgoingEdgeList

java.lang.Object

org.apache.flink.examples.java.graph.PageRank.BuildOutgoingEdgeList

All Implemented Interfaces:

Serializable, Function, GroupReduceFunction<Tuple2<Long,Long>,Tuple2<Long,Long[]>>

Enclosing class:

PageRank

public static final class PageRank.BuildOutgoingEdgeList
extends Object
implements 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 pre-processing step.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
BuildOutgoingEdgeList()

Method Summary

Modifier and Type	Method and Description
void	reduce(Iterable<Tuple2<Long,Long>> values, Collector<Tuple2<Long,Long[]>> out) The reduce method.

Methods inherited from class java.lang.Object

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

Constructor Detail

BuildOutgoingEdgeList

public BuildOutgoingEdgeList()

Method Detail

reduce

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

Description copied from interface: GroupReduceFunction

The reduce method. The function receives one call per group of elements.

Specified by:

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

Parameters:

values - All records that belong to the given input key.

out - The collector to hand results to.