org.apache.spark.graphx

Class EdgeContext<VD,ED,A>

java.lang.Object

org.apache.spark.graphx.EdgeContext<VD,ED,A>

Direct Known Subclasses:

AggregatingEdgeContext

public abstract class EdgeContext<VD,ED,A>
extends java.lang.Object

Represents an edge along with its neighboring vertices and allows sending messages along the edge. Used in Graph.aggregateMessages(scala.Function1<org.apache.spark.graphx.EdgeContext<VD, ED, A>, scala.runtime.BoxedUnit>, scala.Function2<A, A, A>, org.apache.spark.graphx.TripletFields, scala.reflect.ClassTag<A>).

Constructor Summary

Constructors

Constructor and Description
EdgeContext()

Method Summary

Methods

Modifier and Type	Method and Description
abstract ED	attr() The attribute associated with the edge.
abstract VD	dstAttr() The vertex attribute of the edge's destination vertex.
abstract long	dstId() The vertex id of the edge's destination vertex.
abstract void	sendToDst(A msg) Sends a message to the destination vertex.
abstract void	sendToSrc(A msg) Sends a message to the source vertex.
abstract VD	srcAttr() The vertex attribute of the edge's source vertex.
abstract long	srcId() The vertex id of the edge's source vertex.
EdgeTriplet<VD,ED>	toEdgeTriplet() Converts the edge and vertex properties into an EdgeTriplet for convenience.
static <VD,ED,A> scala.Some<scala.Tuple5<java.lang.Object,java.lang.Object,VD,VD,ED>>	unapply(EdgeContext<VD,ED,A> edge) Extractor mainly used for Graph#aggregateMessages*.

Methods inherited from class java.lang.Object

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

Constructor Detail

EdgeContext

public EdgeContext()

Method Detail

unapply

public static <VD,ED,A> scala.Some<scala.Tuple5<java.lang.Object,java.lang.Object,VD,VD,ED>> unapply(EdgeContext<VD,ED,A> edge)

Extractor mainly used for Graph#aggregateMessages*. Example:

  val messages = graph.aggregateMessages(
    case ctx @ EdgeContext(_, _, _, _, attr) =>
      ctx.sendToDst(attr)
    , _ + _)
 

Parameters:

edge - (undocumented)

Returns:

(undocumented)

srcId

public abstract long srcId()

The vertex id of the edge's source vertex.

dstId

public abstract long dstId()

The vertex id of the edge's destination vertex.

srcAttr

public abstract VD srcAttr()

The vertex attribute of the edge's source vertex.

dstAttr

public abstract VD dstAttr()

The vertex attribute of the edge's destination vertex.

attr

public abstract ED attr()

The attribute associated with the edge.

sendToSrc

public abstract void sendToSrc(A msg)

Sends a message to the source vertex.

sendToDst

public abstract void sendToDst(A msg)

Sends a message to the destination vertex.

toEdgeTriplet

public EdgeTriplet<VD,ED> toEdgeTriplet()

Converts the edge and vertex properties into an EdgeTriplet for convenience.