Error executing a very simple HTTP server test using scala akka spray

Question

I did a very simple spray test using:

• Akka 2.10 2.24
• Scala 2.10.3
• Spray Can 1.3.1
• sbt 0.13
• IntelliJ 13

Here is my code:

val myListener: ActorRef = system.actorOf(Props[TestHttpListener], "httpListener")
IO(Http) ! Http.Bind(myListener, interface = "localhost", port = 8080)

httpListenerresponds to Http.Connectedwith Http.Register(self).

I use sbt to run my code. It does not work with AbstractMethodError:

[ERROR] [07/12/2014 18:46:48.364] [default-akka.actor.default-dispatcher-5] [ActorSystem(default)] Uncaught error from thread [default-akka.actor.default-dispatcher-5] shutting down JVM since 'akka.jvm-exit-on-fatal-error' is enabled
java.lang.AbstractMethodError: spray.can.HttpManager.akka$actor$ActorLogging$_setter_$log_$eq(Lakka/event/LoggingAdapter;)V
        at akka.actor.ActorLogging$class.$init$(Actor.scala:335)
        at spray.can.HttpManager.<init>(HttpManager.scala:29)
        at spray.can.HttpExt$$anonfun$1.apply(Http.scala:153)
        at spray.can.HttpExt$$anonfun$1.apply(Http.scala:153)
        at akka.actor.TypedCreatorFunctionConsumer.produce(Props.scala:422)
        at akka.actor.Props.newActor(Props.scala:331)
        at akka.actor.ActorCell.newActor(ActorCell.scala:534)
        at akka.actor.ActorCell.create(ActorCell.scala:560)
        at akka.actor.dungeon.FaultHandling$class.finishCreate(FaultHandling.scala:135)
        at akka.actor.dungeon.FaultHandling$class.faultCreate(FaultHandling.scala:129)
        at akka.actor.ActorCell.faultCreate(ActorCell.scala:338)
        at akka.actor.dungeon.FaultHandling$class.faultRecreate(FaultHandling.scala:58)
        at akka.actor.ActorCell.faultRecreate(ActorCell.scala:338)
        at akka.actor.ActorCell.invokeAll$1(ActorCell.scala:428)
        at akka.actor.ActorCell.systemInvoke(ActorCell.scala:447)
        at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:262)
        at akka.dispatch.Mailbox.run(Mailbox.scala:218)
        at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:385)
        at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
        at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
        at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
        at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

Answer 1

In the Scala world, it is very important to be careful with the versions, as everything evolves quickly and back. Compatibility between major versions is not guaranteed.

.

1.3.1 Scala 2.10.3 Akka 2.3.0, Scala 2.11.1 Akka 2.3.2.

, Scala 2.10.3, Akka 2.3.0.

, , , , , .

, , , IO(Http) ! Http.Bind(...), . , Http.Bind, Http.Bound, , .

, - :

class MyApp extends Actor {

  implicit val system = context.system

  override def receive: Receive = {
    case "start" =>
      val myListener: ActorRef = system.actorOf(Props[TestHttpListener], "httpListener")
      IO(Http) ! Http.Bind(myListener, interface = "localhost", port = 8080)
  }
}

main() :

val myApp: ActorRef = system.actorOf(Props[MyApp], "myApp")
myApp ! "start"

, , , - , :

class TestHttpListener extends Actor {
  def receive = {
    case HttpRequest(HttpMethods.GET, Uri.Path("/ping"), _, _, _) =>
      sender() ! HttpResponse(entity = "PONG")

    case c : Tcp.Connected =>
      sender() ! Http.Register(self)
  }
}