uses collect first where appropriate, removes redundant config from the spec and uses a deathwatch for the listener

akka-zeromq/src/main/scala/akka/zeromq/ConcurrentSocketActor.scala

@@ -9,6 +9,7 @@ import akka.actor._
 import akka.dispatch.{ Promise, Future }
 import akka.event.Logging
 import akka.util.duration._
+import annotation.tailrec
 
 private[zeromq] sealed trait PollLifeCycle
 private[zeromq] case object NoResults extends PollLifeCycle
@@ -27,13 +28,13 @@ private[zeromq] class ConcurrentSocketActor(params: Seq[SocketOption]) extends A
   import ConcurrentSocketActor._
   private val noBytes = Array[Byte]()
   private val zmqContext = {
-    params find (_.isInstanceOf[Context]) map (_.asInstanceOf[Context]) getOrElse new Context(1)
+    params collectFirst { case c: Context ⇒ c } getOrElse Context()
   }
-  private lazy val deserializer = deserializerFromParams
-  private lazy val socket: Socket = socketFromParams
-  private lazy val poller: Poller = zmqContext.poller
-  private val log = Logging(context.system, this)
 
+  private val deserializer = deserializerFromParams
+  private val socket: Socket = socketFromParams
+  private val poller: Poller = zmqContext.poller
+  private val log = Logging(context.system, this)
 
   private def handleConnectionMessages: Receive = {
     case Send(frames) ⇒ {
@@ -61,6 +62,7 @@ private[zeromq] class ConcurrentSocketActor(params: Seq[SocketOption]) extends A
       socket.unsubscribe(topic.toArray)
       pollAndReceiveFrames()
     }
+    case Terminated(_) ⇒ context stop self
   }
 
   private def handleSocketOption: Receive = {
@@ -127,6 +129,7 @@ private[zeromq] class ConcurrentSocketActor(params: Seq[SocketOption]) extends A
   override def receive: Receive = handleConnectionMessages orElse handleSocketOption orElse internalMessage
 
   override def preStart {
+    watchListener()
     setupSocket()
     poller.register(socket, Poller.POLLIN)
     setupConnection()
@@ -139,13 +142,11 @@ private[zeromq] class ConcurrentSocketActor(params: Seq[SocketOption]) extends A
 
   private def socketFromParams() = {
     require(ZeroMQExtension.check[SocketType.ZMQSocketType](params), "A socket type is required")
-    (params
-      find (_.isInstanceOf[SocketType.ZMQSocketType])
-      map (t ⇒ zmqContext.socket(t.asInstanceOf[SocketType.ZMQSocketType])) get)
+    (params collectFirst { case t: SocketType.ZMQSocketType ⇒ zmqContext.socket(t) } get)
   }
 
   private def deserializerFromParams = {
-    params find (_.isInstanceOf[Deserializer]) map (_.asInstanceOf[Deserializer]) getOrElse new ZMQMessageDeserializer
+    params collectFirst { case d: Deserializer ⇒ d } getOrElse new ZMQMessageDeserializer
   }
 
   private def setupSocket() = {
@@ -181,14 +182,12 @@ private[zeromq] class ConcurrentSocketActor(params: Seq[SocketOption]) extends A
   }
 
   private lazy val eventLoopDispatcher = {
-    val fromConfig = params.find(_.isInstanceOf[PollDispatcher]) map {
-      option ⇒ context.system.dispatchers.lookup(option.asInstanceOf[PollDispatcher].name)
-    }
+    val fromConfig = params collectFirst { case PollDispatcher(name) ⇒ context.system.dispatchers.lookup(name) }
     fromConfig getOrElse context.system.dispatcher
   }
 
   private lazy val pollTimeout = {
-    val fromConfig = params find (_.isInstanceOf[PollTimeoutDuration]) map (_.asInstanceOf[PollTimeoutDuration].duration)
+    val fromConfig = params collectFirst { case PollTimeoutDuration(duration) ⇒ duration }
     fromConfig getOrElse 100.millis
   }
 
@@ -225,12 +224,12 @@ private[zeromq] class ConcurrentSocketActor(params: Seq[SocketOption]) extends A
     }
   }
 
+  private def listenerOpt = params collectFirst { case Listener(l) ⇒ l }
+  private def watchListener() {
+    listenerOpt foreach context.watch
+  }
+
   private def notifyListener(message: Any) {
-    params find (_.isInstanceOf[Listener]) map (_.asInstanceOf[Listener].listener) foreach { listener ⇒
-      if (listener.isTerminated)
-        context stop self
-      else
-        listener ! message
-    }
+    listenerOpt foreach { _ ! message }
   }
 }

akka-zeromq/src/test/scala/akka/zeromq/ConcurrentSocketActorSpec.scala

@@ -15,11 +15,6 @@ object ConcurrentSocketActorSpec {
   val config = """
 akka {
   extensions = ["akka.zeromq.ZeroMQExtension$"]
-  zeromq {
-    socket-dispatcher {
-      type = "PinnedDispatcher"
-    }
-  }
 }
 """
 }