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GraphKryoRegistrator.scala
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GraphKryoRegistrator.scala
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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 com.esotericsoftware.kryo.Kryo
import org.apache.spark.graphx.impl._
import org.apache.spark.serializer.KryoRegistrator
import org.apache.spark.util.collection.BitSet
import org.apache.spark.util.BoundedPriorityQueue
/**
* Registers GraphX classes with Kryo for improved performance.
*/
class GraphKryoRegistrator extends KryoRegistrator {
def registerClasses(kryo: Kryo) {
kryo.register(classOf[Edge[Object]])
kryo.register(classOf[MessageToPartition[Object]])
kryo.register(classOf[VertexBroadcastMsg[Object]])
kryo.register(classOf[(VertexId, Object)])
kryo.register(classOf[EdgePartition[Object]])
kryo.register(classOf[BitSet])
kryo.register(classOf[VertexIdToIndexMap])
kryo.register(classOf[VertexAttributeBlock[Object]])
kryo.register(classOf[PartitionStrategy])
kryo.register(classOf[BoundedPriorityQueue[Object]])
kryo.register(classOf[EdgeDirection])
// This avoids a large number of hash table lookups.
kryo.setReferences(false)
}
}