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

This example Akka source code file (DataTypes.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, address, akka, clientop, commandop, concurrent, direction, done, duration, networkop, rolename, serverop, string, terminatemsg, time

The DataTypes.scala Akka example source code

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

import language.implicitConversions

import org.jboss.netty.handler.codec.oneone.OneToOneEncoder
import org.jboss.netty.channel.ChannelHandlerContext
import org.jboss.netty.channel.Channel
import akka.remote.testconductor.{ TestConductorProtocol ⇒ TCP }
import com.google.protobuf.Message
import akka.actor.Address
import org.jboss.netty.handler.codec.oneone.OneToOneDecoder
import scala.concurrent.duration._
import akka.remote.testconductor.TestConductorProtocol.BarrierOp
import akka.remote.transport.ThrottlerTransportAdapter.Direction

final case class RoleName(name: String)

private[akka] final case class ToClient(msg: ClientOp with NetworkOp)
private[akka] final case class ToServer(msg: ServerOp with NetworkOp)

private[akka] sealed trait ClientOp // messages sent to from Conductor to Player
private[akka] sealed trait ServerOp // messages sent to from Player to Conductor
private[akka] sealed trait CommandOp // messages sent from TestConductorExt to Conductor
private[akka] sealed trait NetworkOp // messages sent over the wire
private[akka] sealed trait UnconfirmedClientOp extends ClientOp // unconfirmed messages going to the Player
private[akka] sealed trait ConfirmedClientOp extends ClientOp

/**
 * First message of connection sets names straight.
 */
private[akka] final case class Hello(name: String, addr: Address) extends NetworkOp

private[akka] final case class EnterBarrier(name: String, timeout: Option[FiniteDuration]) extends ServerOp with NetworkOp
private[akka] final case class FailBarrier(name: String) extends ServerOp with NetworkOp
private[akka] final case class BarrierResult(name: String, success: Boolean) extends UnconfirmedClientOp with NetworkOp

private[akka] final case class Throttle(node: RoleName, target: RoleName, direction: Direction, rateMBit: Float) extends CommandOp
private[akka] final case class ThrottleMsg(target: Address, direction: Direction, rateMBit: Float) extends ConfirmedClientOp with NetworkOp

private[akka] final case class Disconnect(node: RoleName, target: RoleName, abort: Boolean) extends CommandOp
private[akka] final case class DisconnectMsg(target: Address, abort: Boolean) extends ConfirmedClientOp with NetworkOp

private[akka] final case class Terminate(node: RoleName, shutdownOrExit: Either[Boolean, Int]) extends CommandOp
private[akka] final case class TerminateMsg(shutdownOrExit: Either[Boolean, Int]) extends ConfirmedClientOp with NetworkOp

private[akka] final case class GetAddress(node: RoleName) extends ServerOp with NetworkOp
private[akka] final case class AddressReply(node: RoleName, addr: Address) extends UnconfirmedClientOp with NetworkOp

private[akka] abstract class Done extends ServerOp with UnconfirmedClientOp with NetworkOp
private[akka] case object Done extends Done {
  def getInstance: Done = this
}

private[akka] final case class Remove(node: RoleName) extends CommandOp

private[akka] class MsgEncoder extends OneToOneEncoder {

  implicit def address2proto(addr: Address): TCP.Address =
    TCP.Address.newBuilder
      .setProtocol(addr.protocol)
      .setSystem(addr.system)
      .setHost(addr.host.get)
      .setPort(addr.port.get)
      .build

  implicit def direction2proto(dir: Direction): TCP.Direction = dir match {
    case Direction.Send    ⇒ TCP.Direction.Send
    case Direction.Receive ⇒ TCP.Direction.Receive
    case Direction.Both    ⇒ TCP.Direction.Both
  }

  def encode(ctx: ChannelHandlerContext, ch: Channel, msg: AnyRef): AnyRef = msg match {
    case x: NetworkOp ⇒
      val w = TCP.Wrapper.newBuilder
      x match {
        case Hello(name, addr) ⇒
          w.setHello(TCP.Hello.newBuilder.setName(name).setAddress(addr))
        case EnterBarrier(name, timeout) ⇒
          val barrier = TCP.EnterBarrier.newBuilder.setName(name)
          timeout foreach (t ⇒ barrier.setTimeout(t.toNanos))
          barrier.setOp(BarrierOp.Enter)
          w.setBarrier(barrier)
        case BarrierResult(name, success) ⇒
          val res = if (success) BarrierOp.Succeeded else BarrierOp.Failed
          w.setBarrier(TCP.EnterBarrier.newBuilder.setName(name).setOp(res))
        case FailBarrier(name) ⇒
          w.setBarrier(TCP.EnterBarrier.newBuilder.setName(name).setOp(BarrierOp.Fail))
        case ThrottleMsg(target, dir, rate) ⇒
          w.setFailure(TCP.InjectFailure.newBuilder.setAddress(target)
            .setFailure(TCP.FailType.Throttle).setDirection(dir).setRateMBit(rate))
        case DisconnectMsg(target, abort) ⇒
          w.setFailure(TCP.InjectFailure.newBuilder.setAddress(target)
            .setFailure(if (abort) TCP.FailType.Abort else TCP.FailType.Disconnect))
        case TerminateMsg(Right(exitValue)) ⇒
          w.setFailure(TCP.InjectFailure.newBuilder.setFailure(TCP.FailType.Exit).setExitValue(exitValue))
        case TerminateMsg(Left(false)) ⇒
          w.setFailure(TCP.InjectFailure.newBuilder.setFailure(TCP.FailType.Shutdown))
        case TerminateMsg(Left(true)) ⇒
          w.setFailure(TCP.InjectFailure.newBuilder.setFailure(TCP.FailType.ShutdownAbrupt))
        case GetAddress(node) ⇒
          w.setAddr(TCP.AddressRequest.newBuilder.setNode(node.name))
        case AddressReply(node, addr) ⇒
          w.setAddr(TCP.AddressRequest.newBuilder.setNode(node.name).setAddr(addr))
        case _: Done ⇒
          w.setDone("")
      }
      w.build
    case _ ⇒ throw new IllegalArgumentException("wrong message " + msg)
  }
}

private[akka] class MsgDecoder extends OneToOneDecoder {

  implicit def address2scala(addr: TCP.Address): Address =
    Address(addr.getProtocol, addr.getSystem, addr.getHost, addr.getPort)

  implicit def direction2scala(dir: TCP.Direction): Direction = dir match {
    case TCP.Direction.Send    ⇒ Direction.Send
    case TCP.Direction.Receive ⇒ Direction.Receive
    case TCP.Direction.Both    ⇒ Direction.Both
  }

  def decode(ctx: ChannelHandlerContext, ch: Channel, msg: AnyRef): AnyRef = msg match {
    case w: TCP.Wrapper if w.getAllFields.size == 1 ⇒
      if (w.hasHello) {
        val h = w.getHello
        Hello(h.getName, h.getAddress)
      } else if (w.hasBarrier) {
        val barrier = w.getBarrier
        barrier.getOp match {
          case BarrierOp.Succeeded ⇒ BarrierResult(barrier.getName, true)
          case BarrierOp.Failed    ⇒ BarrierResult(barrier.getName, false)
          case BarrierOp.Fail      ⇒ FailBarrier(barrier.getName)
          case BarrierOp.Enter ⇒ EnterBarrier(barrier.getName,
            if (barrier.hasTimeout) Option(Duration.fromNanos(barrier.getTimeout)) else None)
        }
      } else if (w.hasFailure) {
        val f = w.getFailure
        import TCP.{ FailType ⇒ FT }
        f.getFailure match {
          case FT.Throttle       ⇒ ThrottleMsg(f.getAddress, f.getDirection, f.getRateMBit)
          case FT.Abort          ⇒ DisconnectMsg(f.getAddress, true)
          case FT.Disconnect     ⇒ DisconnectMsg(f.getAddress, false)
          case FT.Exit           ⇒ TerminateMsg(Right(f.getExitValue))
          case FT.Shutdown       ⇒ TerminateMsg(Left(false))
          case FT.ShutdownAbrupt ⇒ TerminateMsg(Left(true))
        }
      } else if (w.hasAddr) {
        val a = w.getAddr
        if (a.hasAddr) AddressReply(RoleName(a.getNode), a.getAddr)
        else GetAddress(RoleName(a.getNode))
      } else if (w.hasDone) {
        Done
      } else {
        throw new IllegalArgumentException("unknown message " + msg)
      }
    case _ ⇒ throw new IllegalArgumentException("wrong message " + msg)
  }
}

Other Akka source code examples

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