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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.graphx
import scala.reflect.ClassTag
import org.apache.spark.SparkConf
import org.apache.spark.graphx.impl._
import org.apache.spark.graphx.util.collection.GraphXPrimitiveKeyOpenHashMap
import org.apache.spark.util.BoundedPriorityQueue
import org.apache.spark.util.collection.{BitSet, OpenHashSet}
object GraphXUtils {
/**
* Registers classes that GraphX uses with Kryo.
*/
def registerKryoClasses(conf: SparkConf) {
conf.registerKryoClasses(Array(
classOf[Edge[Object]],
classOf[(VertexId, Object)],
classOf[EdgePartition[Object, Object]],
classOf[BitSet],
classOf[VertexIdToIndexMap],
classOf[VertexAttributeBlock[Object]],
classOf[PartitionStrategy],
classOf[BoundedPriorityQueue[Object]],
classOf[EdgeDirection],
classOf[GraphXPrimitiveKeyOpenHashMap[VertexId, Int]],
classOf[OpenHashSet[Int]],
classOf[OpenHashSet[Long]]))
}
/**
* A proxy method to map the obsolete API to the new one.
*/
private[graphx] def mapReduceTriplets[VD: ClassTag, ED: ClassTag, A: ClassTag](
g: Graph[VD, ED],
mapFunc: EdgeTriplet[VD, ED] => Iterator[(VertexId, A)],
reduceFunc: (A, A) => A,
activeSetOpt: Option[(VertexRDD[_], EdgeDirection)] = None): VertexRDD[A] = {
def sendMsg(ctx: EdgeContext[VD, ED, A]) {
mapFunc(ctx.toEdgeTriplet).foreach { kv =>
val id = kv._1
val msg = kv._2
if (id == ctx.srcId) {
ctx.sendToSrc(msg)
} else {
assert(id == ctx.dstId)
ctx.sendToDst(msg)
}
}
}
g.aggregateMessagesWithActiveSet(
sendMsg, reduceFunc, TripletFields.All, activeSetOpt)
}
}
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