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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.nio
import java.net.InetSocketAddress
import java.nio.ByteBuffer
import scala.collection.mutable.ArrayBuffer
import org.apache.spark.util.Utils
private[nio] abstract class Message(val typ: Long, val id: Int) {
var senderAddress: InetSocketAddress = null
var started = false
var startTime = -1L
var finishTime = -1L
var isSecurityNeg = false
var hasError = false
def size: Int
def getChunkForSending(maxChunkSize: Int): Option[MessageChunk]
def getChunkForReceiving(chunkSize: Int): Option[MessageChunk]
def timeTaken(): String = (finishTime - startTime).toString + " ms"
override def toString = this.getClass.getSimpleName + "(id = " + id + ", size = " + size + ")"
}
private[nio] object Message {
val BUFFER_MESSAGE = 1111111111L
var lastId = 1
def getNewId() = synchronized {
lastId += 1
if (lastId == 0) {
lastId += 1
}
lastId
}
def createBufferMessage(dataBuffers: Seq[ByteBuffer], ackId: Int): BufferMessage = {
if (dataBuffers == null) {
return new BufferMessage(getNewId(), new ArrayBuffer[ByteBuffer], ackId)
}
if (dataBuffers.exists(_ == null)) {
throw new Exception("Attempting to create buffer message with null buffer")
}
new BufferMessage(getNewId(), new ArrayBuffer[ByteBuffer] ++= dataBuffers, ackId)
}
def createBufferMessage(dataBuffers: Seq[ByteBuffer]): BufferMessage =
createBufferMessage(dataBuffers, 0)
def createBufferMessage(dataBuffer: ByteBuffer, ackId: Int): BufferMessage = {
if (dataBuffer == null) {
createBufferMessage(Array(ByteBuffer.allocate(0)), ackId)
} else {
createBufferMessage(Array(dataBuffer), ackId)
}
}
def createBufferMessage(dataBuffer: ByteBuffer): BufferMessage =
createBufferMessage(dataBuffer, 0)
def createBufferMessage(ackId: Int): BufferMessage = {
createBufferMessage(new Array[ByteBuffer](0), ackId)
}
/**
* Create a "negative acknowledgment" to notify a sender that an error occurred
* while processing its message. The exception's stacktrace will be formatted
* as a string, serialized into a byte array, and sent as the message payload.
*/
def createErrorMessage(exception: Exception, ackId: Int): BufferMessage = {
val exceptionString = Utils.exceptionString(exception)
val serializedExceptionString = ByteBuffer.wrap(exceptionString.getBytes("utf-8"))
val errorMessage = createBufferMessage(serializedExceptionString, ackId)
errorMessage.hasError = true
errorMessage
}
def create(header: MessageChunkHeader): Message = {
val newMessage: Message = header.typ match {
case BUFFER_MESSAGE => new BufferMessage(header.id,
ArrayBuffer(ByteBuffer.allocate(header.totalSize)), header.other)
}
newMessage.hasError = header.hasError
newMessage.senderAddress = header.address
newMessage
}
}
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