Akka/Scala example source code file (UdpSender.scala)

This example Akka source code file (UdpSender.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

actor, actorlogging, akka, channelregistry, closing, collection, datagramchannel, dispatch, io, nonfatal, receive, requiresmessagequeue, simplesenderready, udpext, udpsender, utilities, withudpsend

The UdpSender.scala Akka example source code

/**
 * Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
 */
package akka.io

import java.nio.channels.DatagramChannel
import scala.collection.immutable
import scala.util.control.NonFatal
import akka.dispatch.{ RequiresMessageQueue, UnboundedMessageQueueSemantics }
import akka.io.Inet.SocketOption
import akka.io.Udp._
import akka.actor._

/**
 * INTERNAL API
 */
private[io] class UdpSender(val udp: UdpExt,
                            channelRegistry: ChannelRegistry,
                            commander: ActorRef,
                            options: immutable.Traversable[SocketOption])
  extends Actor with ActorLogging with WithUdpSend with RequiresMessageQueue[UnboundedMessageQueueSemantics] {

  val channel = {
    val datagramChannel = DatagramChannel.open
    datagramChannel.configureBlocking(false)
    val socket = datagramChannel.socket

    options foreach { _.beforeDatagramBind(socket) }

    datagramChannel
  }
  channelRegistry.register(channel, initialOps = 0)

  def receive: Receive = {
    case registration: ChannelRegistration ⇒
      commander ! SimpleSenderReady
      context.become(sendHandlers(registration))
  }

  override def postStop(): Unit = if (channel.isOpen) {
    log.debug("Closing DatagramChannel after being stopped")
    try channel.close()
    catch {
      case NonFatal(e) ⇒ log.debug("Error closing DatagramChannel: {}", e)
    }
  }
}