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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.network.netty
import scala.concurrent.{Promise, Future}
import org.apache.spark.SparkConf
import org.apache.spark.network._
import org.apache.spark.network.buffer.ManagedBuffer
import org.apache.spark.network.client.{RpcResponseCallback, TransportClient, TransportClientFactory}
import org.apache.spark.network.netty.NettyMessages.UploadBlock
import org.apache.spark.network.server._
import org.apache.spark.network.util.{ConfigProvider, TransportConf}
import org.apache.spark.serializer.JavaSerializer
import org.apache.spark.storage.{BlockId, StorageLevel}
import org.apache.spark.util.Utils
/**
* A BlockTransferService that uses Netty to fetch a set of blocks at at time.
*/
class NettyBlockTransferService(conf: SparkConf) extends BlockTransferService {
// TODO: Don't use Java serialization, use a more cross-version compatible serialization format.
val serializer = new JavaSerializer(conf)
// Create a TransportConfig using SparkConf.
private[this] val transportConf = new TransportConf(
new ConfigProvider { override def get(name: String) = conf.get(name) })
private[this] var transportContext: TransportContext = _
private[this] var server: TransportServer = _
private[this] var clientFactory: TransportClientFactory = _
override def init(blockDataManager: BlockDataManager): Unit = {
val streamManager = new DefaultStreamManager
val rpcHandler = new NettyBlockRpcServer(serializer, streamManager, blockDataManager)
transportContext = new TransportContext(transportConf, streamManager, rpcHandler)
clientFactory = transportContext.createClientFactory()
server = transportContext.createServer()
}
override def fetchBlocks(
hostname: String,
port: Int,
blockIds: Seq[String],
listener: BlockFetchingListener): Unit = {
try {
val client = clientFactory.createClient(hostname, port)
new NettyBlockFetcher(serializer, client, blockIds, listener).start()
} catch {
case e: Exception =>
logError("Exception while beginning fetchBlocks", e)
blockIds.foreach(listener.onBlockFetchFailure(_, e))
}
}
override def hostName: String = Utils.localHostName()
override def port: Int = server.getPort
override def uploadBlock(
hostname: String,
port: Int,
blockId: BlockId,
blockData: ManagedBuffer,
level: StorageLevel): Future[Unit] = {
val result = Promise[Unit]()
val client = clientFactory.createClient(hostname, port)
// Convert or copy nio buffer into array in order to serialize it.
val nioBuffer = blockData.nioByteBuffer()
val array = if (nioBuffer.hasArray) {
nioBuffer.array()
} else {
val data = new Array[Byte](nioBuffer.remaining())
nioBuffer.get(data)
data
}
val ser = serializer.newInstance()
client.sendRpc(ser.serialize(new UploadBlock(blockId, array, level)).array(),
new RpcResponseCallback {
override def onSuccess(response: Array[Byte]): Unit = {
logTrace(s"Successfully uploaded block $blockId")
result.success()
}
override def onFailure(e: Throwable): Unit = {
logError(s"Error while uploading block $blockId", e)
result.failure(e)
}
})
result.future
}
override def close(): Unit = server.close()
}
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