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package spark.network.netty
import java.util.concurrent.Executors
import io.netty.buffer.ByteBuf
import io.netty.channel.ChannelHandlerContext
import io.netty.util.CharsetUtil
import spark.Logging
import spark.network.ConnectionManagerId
private[spark] class ShuffleCopier extends Logging {
def getBlock(cmId: ConnectionManagerId, blockId: String,
resultCollectCallback: (String, Long, ByteBuf) => Unit) {
val handler = new ShuffleCopier.ShuffleClientHandler(resultCollectCallback)
val fc = new FileClient(handler)
fc.init()
fc.connect(cmId.host, cmId.port)
fc.sendRequest(blockId)
fc.waitForClose()
fc.close()
}
def getBlocks(cmId: ConnectionManagerId,
blocks: Seq[(String, Long)],
resultCollectCallback: (String, Long, ByteBuf) => Unit) {
for ((blockId, size) <- blocks) {
getBlock(cmId, blockId, resultCollectCallback)
}
}
}
private[spark] object ShuffleCopier extends Logging {
private class ShuffleClientHandler(resultCollectCallBack: (String, Long, ByteBuf) => Unit)
extends FileClientHandler with Logging {
override def handle(ctx: ChannelHandlerContext, in: ByteBuf, header: FileHeader) {
logDebug("Received Block: " + header.blockId + " (" + header.fileLen + "B)");
resultCollectCallBack(header.blockId, header.fileLen.toLong, in.readBytes(header.fileLen))
}
}
def echoResultCollectCallBack(blockId: String, size: Long, content: ByteBuf) {
logInfo("File: " + blockId + " content is : \" " + content.toString(CharsetUtil.UTF_8) + "\"")
}
def runGetBlock(host:String, port:Int, file:String){
val handler = new ShuffleClientHandler(echoResultCollectCallBack)
val fc = new FileClient(handler)
fc.init();
fc.connect(host, port)
fc.sendRequest(file)
fc.waitForClose();
fc.close()
}
def main(args: Array[String]) {
if (args.length < 3) {
System.err.println("Usage: ShuffleCopier <host> <port> <shuffle_block_id> <threads>")
System.exit(1)
}
val host = args(0)
val port = args(1).toInt
val file = args(2)
val threads = if (args.length > 3) args(3).toInt else 10
val copiers = Executors.newFixedThreadPool(80)
for (i <- Range(0, threads)) {
val runnable = new Runnable() {
def run() {
runGetBlock(host, port, file)
}
}
copiers.execute(runnable)
}
copiers.shutdown
}
}
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