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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.storage
import java.io.{Externalizable, ObjectInput, ObjectOutput}
import org.apache.spark.rpc.RpcEndpointRef
import org.apache.spark.util.Utils
private[spark] object BlockManagerMessages {
//////////////////////////////////////////////////////////////////////////////////
// Messages from the master to slaves.
//////////////////////////////////////////////////////////////////////////////////
sealed trait ToBlockManagerSlave
// Remove a block from the slaves that have it. This can only be used to remove
// blocks that the master knows about.
case class RemoveBlock(blockId: BlockId) extends ToBlockManagerSlave
// Replicate blocks that were lost due to executor failure
case class ReplicateBlock(blockId: BlockId, replicas: Seq[BlockManagerId], maxReplicas: Int)
extends ToBlockManagerSlave
// Remove all blocks belonging to a specific RDD.
case class RemoveRdd(rddId: Int) extends ToBlockManagerSlave
// Remove all blocks belonging to a specific shuffle.
case class RemoveShuffle(shuffleId: Int) extends ToBlockManagerSlave
// Remove all blocks belonging to a specific broadcast.
case class RemoveBroadcast(broadcastId: Long, removeFromDriver: Boolean = true)
extends ToBlockManagerSlave
/**
* Driver to Executor message to trigger a thread dump.
*/
case object TriggerThreadDump extends ToBlockManagerSlave
//////////////////////////////////////////////////////////////////////////////////
// Messages from slaves to the master.
//////////////////////////////////////////////////////////////////////////////////
sealed trait ToBlockManagerMaster
case class RegisterBlockManager(
blockManagerId: BlockManagerId,
maxOnHeapMemSize: Long,
maxOffHeapMemSize: Long,
sender: RpcEndpointRef)
extends ToBlockManagerMaster
case class UpdateBlockInfo(
var blockManagerId: BlockManagerId,
var blockId: BlockId,
var storageLevel: StorageLevel,
var memSize: Long,
var diskSize: Long)
extends ToBlockManagerMaster
with Externalizable {
def this() = this(null, null, null, 0, 0) // For deserialization only
override def writeExternal(out: ObjectOutput): Unit = Utils.tryOrIOException {
blockManagerId.writeExternal(out)
out.writeUTF(blockId.name)
storageLevel.writeExternal(out)
out.writeLong(memSize)
out.writeLong(diskSize)
}
override def readExternal(in: ObjectInput): Unit = Utils.tryOrIOException {
blockManagerId = BlockManagerId(in)
blockId = BlockId(in.readUTF())
storageLevel = StorageLevel(in)
memSize = in.readLong()
diskSize = in.readLong()
}
}
case class GetLocations(blockId: BlockId) extends ToBlockManagerMaster
case class GetLocationsMultipleBlockIds(blockIds: Array[BlockId]) extends ToBlockManagerMaster
case class GetPeers(blockManagerId: BlockManagerId) extends ToBlockManagerMaster
case class GetExecutorEndpointRef(executorId: String) extends ToBlockManagerMaster
case class RemoveExecutor(execId: String) extends ToBlockManagerMaster
case object StopBlockManagerMaster extends ToBlockManagerMaster
case object GetMemoryStatus extends ToBlockManagerMaster
case object GetStorageStatus extends ToBlockManagerMaster
case class GetBlockStatus(blockId: BlockId, askSlaves: Boolean = true)
extends ToBlockManagerMaster
case class GetMatchingBlockIds(filter: BlockId => Boolean, askSlaves: Boolean = true)
extends ToBlockManagerMaster
case class BlockManagerHeartbeat(blockManagerId: BlockManagerId) extends ToBlockManagerMaster
case class HasCachedBlocks(executorId: String) extends ToBlockManagerMaster
}
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