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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.nio.ByteBuffer
import org.apache.spark._
import org.apache.spark.storage.{StorageLevel, TestBlockId}
import scala.collection.mutable.ArrayBuffer
private[nio]
class BlockMessageArray(var blockMessages: Seq[BlockMessage])
extends Seq[BlockMessage] with Logging {
def this(bm: BlockMessage) = this(Array(bm))
def this() = this(null.asInstanceOf[Seq[BlockMessage]])
def apply(i: Int): BlockMessage = blockMessages(i)
def iterator: Iterator[BlockMessage] = blockMessages.iterator
def length: Int = blockMessages.length
def set(bufferMessage: BufferMessage) {
val startTime = System.currentTimeMillis
val newBlockMessages = new ArrayBuffer[BlockMessage]()
val buffer = bufferMessage.buffers(0)
buffer.clear()
/*
println()
println("BlockMessageArray: ")
while(buffer.remaining > 0) {
print(buffer.get())
}
buffer.rewind()
println()
println()
*/
while (buffer.remaining() > 0) {
val size = buffer.getInt()
logDebug("Creating block message of size " + size + " bytes")
val newBuffer = buffer.slice()
newBuffer.clear()
newBuffer.limit(size)
logDebug("Trying to convert buffer " + newBuffer + " to block message")
val newBlockMessage = BlockMessage.fromByteBuffer(newBuffer)
logDebug("Created " + newBlockMessage)
newBlockMessages += newBlockMessage
buffer.position(buffer.position() + size)
}
val finishTime = System.currentTimeMillis
logDebug("Converted block message array from buffer message in " +
(finishTime - startTime) / 1000.0 + " s")
this.blockMessages = newBlockMessages
}
def toBufferMessage: BufferMessage = {
val buffers = new ArrayBuffer[ByteBuffer]()
blockMessages.foreach(blockMessage => {
val bufferMessage = blockMessage.toBufferMessage
logDebug("Adding " + blockMessage)
val sizeBuffer = ByteBuffer.allocate(4).putInt(bufferMessage.size)
sizeBuffer.flip
buffers += sizeBuffer
buffers ++= bufferMessage.buffers
logDebug("Added " + bufferMessage)
})
logDebug("Buffer list:")
buffers.foreach((x: ByteBuffer) => logDebug("" + x))
/*
println()
println("BlockMessageArray: ")
buffers.foreach(b => {
while(b.remaining > 0) {
print(b.get())
}
b.rewind()
})
println()
println()
*/
Message.createBufferMessage(buffers)
}
}
private[nio] object BlockMessageArray {
def fromBufferMessage(bufferMessage: BufferMessage): BlockMessageArray = {
val newBlockMessageArray = new BlockMessageArray()
newBlockMessageArray.set(bufferMessage)
newBlockMessageArray
}
def main(args: Array[String]) {
val blockMessages =
(0 until 10).map { i =>
if (i % 2 == 0) {
val buffer = ByteBuffer.allocate(100)
buffer.clear
BlockMessage.fromPutBlock(PutBlock(TestBlockId(i.toString), buffer,
StorageLevel.MEMORY_ONLY_SER))
} else {
BlockMessage.fromGetBlock(GetBlock(TestBlockId(i.toString)))
}
}
val blockMessageArray = new BlockMessageArray(blockMessages)
println("Block message array created")
val bufferMessage = blockMessageArray.toBufferMessage
println("Converted to buffer message")
val totalSize = bufferMessage.size
val newBuffer = ByteBuffer.allocate(totalSize)
newBuffer.clear()
bufferMessage.buffers.foreach(buffer => {
assert (0 == buffer.position())
newBuffer.put(buffer)
buffer.rewind()
})
newBuffer.flip
val newBufferMessage = Message.createBufferMessage(newBuffer)
println("Copied to new buffer message, size = " + newBufferMessage.size)
val newBlockMessageArray = BlockMessageArray.fromBufferMessage(newBufferMessage)
println("Converted back to block message array")
newBlockMessageArray.foreach(blockMessage => {
blockMessage.getType match {
case BlockMessage.TYPE_PUT_BLOCK => {
val pB = PutBlock(blockMessage.getId, blockMessage.getData, blockMessage.getLevel)
println(pB)
}
case BlockMessage.TYPE_GET_BLOCK => {
val gB = new GetBlock(blockMessage.getId)
println(gB)
}
}
})
}
}
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