spark NettyRpcCallContext 源码
spark NettyRpcCallContext 代码
文件路径：/core/src/main/scala/org/apache/spark/rpc/netty/NettyRpcCallContext.scala
/*
* 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.rpc.netty
import scala.concurrent.Promise
import org.apache.spark.internal.Logging
import org.apache.spark.network.client.RpcResponseCallback
import org.apache.spark.rpc.{RpcAddress, RpcCallContext}
private[netty] abstract class NettyRpcCallContext(override val senderAddress: RpcAddress)
extends RpcCallContext with Logging {
protected def send(message: Any): Unit
override def reply(response: Any): Unit = {
send(response)
}
override def sendFailure(e: Throwable): Unit = {
send(RpcFailure(e))
}
}
/**
* If the sender and the receiver are in the same process, the reply can be sent back via `Promise`.
*/
private[netty] class LocalNettyRpcCallContext(
senderAddress: RpcAddress,
p: Promise[Any])
extends NettyRpcCallContext(senderAddress) {
override protected def send(message: Any): Unit = {
p.success(message)
}
}
/**
* A [[RpcCallContext]] that will call [[RpcResponseCallback]] to send the reply back.
*/
private[netty] class RemoteNettyRpcCallContext(
nettyEnv: NettyRpcEnv,
callback: RpcResponseCallback,
senderAddress: RpcAddress)
extends NettyRpcCallContext(senderAddress) {
override protected def send(message: Any): Unit = {
val reply = nettyEnv.serialize(message)
callback.onSuccess(reply)
}
}
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