Preparing Akka Camel for bin compat

akka-actor/src/main/scala/akka/dispatch/AbstractDispatcher.scala

@@ -214,7 +214,7 @@ private[akka] object MessageDispatcher {
 
   // dispatcher debugging helper using println (see below)
   // since this is a compile-time constant, scalac will elide code behind if (MessageDispatcher.debug) (RK checked with 2.9.1)
-  final val debug = false
+  final val debug = false // Deliberately without type ascription to make it a compile-time constant
   lazy val actors = new Index[MessageDispatcher, ActorRef](16, _ compareTo _)
   def printActors: Unit = if (debug) {
     for {

akka-actor/src/main/scala/akka/dispatch/Mailbox.scala

@@ -31,15 +31,15 @@ private[akka] object Mailbox {
    */
 
   // primary status: only first three
-  final val Open = 0 // _status is not initialized in AbstractMailbox, so default must be zero!
-  final val Suspended = 1
-  final val Closed = 2
+  final val Open = 0 // _status is not initialized in AbstractMailbox, so default must be zero! Deliberately without type ascription to make it a compile-time constant
+  final val Suspended = 1 // Deliberately without type ascription to make it a compile-time constant
+  final val Closed = 2 // Deliberately without type ascription to make it a compile-time constant
   // secondary status: Scheduled bit may be added to Open/Suspended
-  final val Scheduled = 4
+  final val Scheduled = 4 // Deliberately without type ascription to make it a compile-time constant
 
   // mailbox debugging helper using println (see below)
   // since this is a compile-time constant, scalac will elide code behind if (Mailbox.debug) (RK checked with 2.9.1)
-  final val debug = false
+  final val debug = false // Deliberately without type ascription to make it a compile-time constant
 }
 
 /**

akka-camel/src/main/scala/akka/camel/Activation.scala

@@ -18,9 +18,9 @@ import akka.pattern._
 trait Activation {
   import akka.dispatch.Await
 
-  def system: ActorSystem
+  def system: ActorSystem //FIXME Why is this here, what's it needed for and who should use it?
 
-  private val activationTracker = system.actorOf(Props[ActivationTracker], "camelActivationTracker")
+  private val activationTracker = system.actorOf(Props[ActivationTracker], "camelActivationTracker") //FIXME Why is this also top level?
 
   /**
    * Awaits for endpoint to be activated. It blocks until the endpoint is registered in camel context or timeout expires.
@@ -29,13 +29,10 @@ trait Activation {
    * @throws akka.camel.ActivationTimeoutException if endpoint is not activated within timeout.
    * @return the activated ActorRef
    */
-  def awaitActivation(endpoint: ActorRef, timeout: Duration): ActorRef = {
-    try {
-      Await.result(activationFutureFor(endpoint, timeout), timeout)
-    } catch {
+  def awaitActivation(endpoint: ActorRef, timeout: Duration): ActorRef =
+    try Await.result(activationFutureFor(endpoint, timeout), timeout) catch {
       case e: TimeoutException ⇒ throw new ActivationTimeoutException(endpoint, timeout)
     }
-  }
 
   /**
    * Awaits for endpoint to be de-activated. It is blocking until endpoint is unregistered in camel context or timeout expires.
@@ -43,37 +40,32 @@ trait Activation {
    * @param timeout the timeout for the wait
    * @throws akka.camel.DeActivationTimeoutException if endpoint is not de-activated within timeout.
    */
-  def awaitDeactivation(endpoint: ActorRef, timeout: Duration) {
-    try {
-      Await.result(deactivationFutureFor(endpoint, timeout), timeout)
-    } catch {
+  def awaitDeactivation(endpoint: ActorRef, timeout: Duration): Unit =
+    try Await.result(deactivationFutureFor(endpoint, timeout), timeout) catch {
       case e: TimeoutException ⇒ throw new DeActivationTimeoutException(endpoint, timeout)
     }
-  }
 
   /**
    * Similar to `awaitActivation` but returns a future instead.
    * @param endpoint the endpoint to be activated
    * @param timeout the timeout for the Future
    */
-  def activationFutureFor(endpoint: ActorRef, timeout: Duration): Future[ActorRef] = {
+  def activationFutureFor(endpoint: ActorRef, timeout: Duration): Future[ActorRef] =
     (activationTracker.ask(AwaitActivation(endpoint))(Timeout(timeout))).map[ActorRef] {
       case EndpointActivated(_)               ⇒ endpoint
       case EndpointFailedToActivate(_, cause) ⇒ throw cause
     }
-  }
 
   /**
    * Similar to awaitDeactivation but returns a future instead.
    * @param endpoint the endpoint to be deactivated
    * @param timeout the timeout of the Future
    */
-  def deactivationFutureFor(endpoint: ActorRef, timeout: Duration): Future[Unit] = {
+  def deactivationFutureFor(endpoint: ActorRef, timeout: Duration): Future[Unit] =
     (activationTracker.ask(AwaitDeActivation(endpoint))(Timeout(timeout))).map[Unit] {
       case EndpointDeActivated(_)               ⇒ ()
       case EndpointFailedToDeActivate(_, cause) ⇒ throw cause
     }
-  }
 }
 
 /**
@@ -82,7 +74,7 @@ trait Activation {
  * @param timeout the timeout
  */
 class DeActivationTimeoutException(endpoint: ActorRef, timeout: Duration) extends TimeoutException {
-  override def getMessage = "Timed out after %s, while waiting for de-activation of %s" format (timeout, endpoint.path)
+  override def getMessage: String = "Timed out after %s, while waiting for de-activation of %s" format (timeout, endpoint.path)
 }
 
 /**
@@ -91,5 +83,5 @@ class DeActivationTimeoutException(endpoint: ActorRef, timeout: Duration) extend
  * @param timeout the timeout
  */
 class ActivationTimeoutException(endpoint: ActorRef, timeout: Duration) extends TimeoutException {
-  override def getMessage = "Timed out after %s, while waiting for activation of %s" format (timeout, endpoint.path)
+  override def getMessage: String = "Timed out after %s, while waiting for activation of %s" format (timeout, endpoint.path)
 }

akka-camel/src/main/scala/akka/camel/ActorNotRegisteredException.scala

@@ -6,5 +6,5 @@ package akka.camel
  * @author Martin Krasser
  */
 class ActorNotRegisteredException(uri: String) extends RuntimeException {
-  override def getMessage = "Actor [%s] doesn't exist" format uri
+  override def getMessage: String = "Actor [%s] doesn't exist" format uri
 }

akka-camel/src/main/scala/akka/camel/ActorRouteDefinition.scala

@@ -29,7 +29,8 @@ class ActorRouteDefinition(definition: ProcessorDefinition[_]) {
    * @param actorRef the consumer with a default configuration.
    * @return the path to the actor, as a camel uri String
    */
-  def to(actorRef: ActorRef) = definition.to(ActorEndpointPath(actorRef).toCamelPath())
+  def to(actorRef: ActorRef) = //FIXME What is the return type of this?
+    definition.to(ActorEndpointPath(actorRef).toCamelPath())
 
   /**
    * Sends the message to an ActorRef endpoint
@@ -37,6 +38,7 @@ class ActorRouteDefinition(definition: ProcessorDefinition[_]) {
    * @param consumerConfig the configuration for the consumer
    * @return the path to the actor, as a camel uri String
    */
-  def to(actorRef: ActorRef, consumerConfig: ConsumerConfig) = definition.to(ActorEndpointPath(actorRef).toCamelPath(consumerConfig))
+  def to(actorRef: ActorRef, consumerConfig: ConsumerConfig) = //FIXME What is the return type of this?
+    definition.to(ActorEndpointPath(actorRef).toCamelPath(consumerConfig))
 }
 

akka-camel/src/main/scala/akka/camel/Camel.scala

@@ -50,13 +50,13 @@ object CamelExtension extends ExtensionId[Camel] with ExtensionIdProvider {
   /**
    * Creates a new instance of Camel and makes sure it gets stopped when the actor system is shutdown.
    */
-  def createExtension(system: ExtendedActorSystem) = {
+  override def createExtension(system: ExtendedActorSystem): Camel = {
     val camel = new DefaultCamel(system).start
     system.registerOnTermination(camel.shutdown())
     camel
   }
 
-  def lookup(): ExtensionId[Camel] = CamelExtension
+  override def lookup(): ExtensionId[Camel] = CamelExtension
 
   override def get(system: ActorSystem): Camel = super.get(system)
 }

akka-camel/src/main/scala/akka/camel/CamelMessage.scala

@@ -21,12 +21,12 @@ case class CamelMessage(body: Any, headers: Map[String, Any]) {
 
   def this(body: Any, headers: JMap[String, Any]) = this(body, headers.toMap) //for Java
 
-  override def toString = "CamelMessage(%s, %s)" format (body, headers)
+  override def toString: String = "CamelMessage(%s, %s)" format (body, headers)
 
   /**
    * Returns those headers from this message whose name is contained in <code>names</code>.
    */
-  def headers(names: Set[String]): Map[String, Any] = headers.filterKeys(names contains _)
+  def headers(names: Set[String]): Map[String, Any] = headers filterKeys names
 
   /**
    * Returns those headers from this message whose name is contained in <code>names</code>.
@@ -75,7 +75,7 @@ case class CamelMessage(body: Any, headers: Map[String, Any]) {
   /**
    * Creates a CamelMessage with a given <code>body</code>.
    */
-  def withBody(body: Any) = CamelMessage(body, this.headers)
+  def withBody(body: Any): CamelMessage = CamelMessage(body, this.headers)
 
   /**
    * Creates a new CamelMessage with given <code>headers</code>.
@@ -119,9 +119,9 @@ case class CamelMessage(body: Any, headers: Map[String, Any]) {
    * Creates a new CamelMessage where the header with given <code>headerName</code> is removed from
    * the existing headers.
    */
-  def withoutHeader(headerName: String) = copy(this.body, this.headers - headerName)
+  def withoutHeader(headerName: String): CamelMessage = copy(this.body, this.headers - headerName)
 
-  def copyContentTo(to: JCamelMessage) = {
+  def copyContentTo(to: JCamelMessage): Unit = {
     to.setBody(this.body)
     for ((name, value) ← this.headers) to.getHeaders.put(name, value.asInstanceOf[AnyRef])
   }
@@ -145,8 +145,7 @@ case class CamelMessage(body: Any, headers: Map[String, Any]) {
    * Java API
    *
    */
-  def getBodyAs[T](clazz: Class[T], camelContext: CamelContext): T =
-    camelContext.getTypeConverter.mandatoryConvertTo[T](clazz, body)
+  def getBodyAs[T](clazz: Class[T], camelContext: CamelContext): T = camelContext.getTypeConverter.mandatoryConvertTo[T](clazz, body)
 
   /**
    * Creates a CamelMessage with current <code>body</code> converted to type <code>T</code>.
@@ -184,7 +183,7 @@ case class CamelMessage(body: Any, headers: Map[String, Any]) {
    * <p>
    * Java API
    */
-  def getHeaderAs[T](name: String, clazz: Class[T], camelContext: CamelContext) = headerAs[T](name)(Manifest.classType(clazz), camelContext).get
+  def getHeaderAs[T](name: String, clazz: Class[T], camelContext: CamelContext): T = headerAs[T](name)(Manifest.classType(clazz), camelContext).get
 
 }
 
@@ -201,7 +200,7 @@ object CamelMessage {
    * so that it can be correlated with an asynchronous response. Messages send to Consumer
    * actors have this header already set.
    */
-  val MessageExchangeId = "MessageExchangeId".intern
+  val MessageExchangeId = "MessageExchangeId".intern //Deliberately without type ascription to make it a constant
 
   /**
    * Creates a canonical form of the given message <code>msg</code>. If <code>msg</code> of type
@@ -244,5 +243,7 @@ case object Ack {
  * message or Exchange.getOut message, depending on the exchange pattern.
  *
  */
-class AkkaCamelException private[akka] (cause: Throwable, val headers: Map[String, Any] = Map.empty)
-  extends AkkaException(cause.getMessage, cause)
+class AkkaCamelException private[akka] (cause: Throwable, val headers: Map[String, Any])
+  extends AkkaException(cause.getMessage, cause) {
+  def this(cause: Throwable) = this(cause, Map.empty)
+}

akka-camel/src/main/scala/akka/camel/Consumer.scala

@@ -31,7 +31,7 @@ trait ConsumerConfig {
   /**
    * How long the actor should wait for activation before it fails.
    */
-  def activationTimeout: Duration = 10 seconds
+  def activationTimeout: Duration = 10 seconds // FIXME Should be configured in reference.conf
 
   /**
    * When endpoint is out-capable (can produce responses) replyTimeout is the maximum time
@@ -39,14 +39,14 @@ trait ConsumerConfig {
    * This setting is used for out-capable, in-only, manually acknowledged communication.
    * When the blocking is set to Blocking replyTimeout is ignored.
    */
-  def replyTimeout: Duration = 1 minute
+  def replyTimeout: Duration = 1 minute // FIXME Should be configured in reference.conf
 
   /**
    * Determines whether one-way communications between an endpoint and this consumer actor
    * should be auto-acknowledged or application-acknowledged.
    * This flag has only effect when exchange is in-only.
    */
-  def autoack: Boolean = true
+  def autoack: Boolean = true // FIXME Should be configured in reference.conf
 
   /**
    * The route definition handler for creating a custom route to this consumer instance.

akka-camel/src/main/scala/akka/camel/Producer.scala

@@ -6,8 +6,9 @@ package akka.camel
 
 import akka.actor.Actor
 import internal.CamelExchangeAdapter
-import org.apache.camel.{ Exchange, ExchangePattern, AsyncCallback }
 import akka.actor.Status.Failure
+import org.apache.camel.{ Endpoint, Exchange, ExchangePattern, AsyncCallback }
+import org.apache.camel.processor.SendProcessor
 
 /**
  * Support trait for producing messages to Camel endpoints.
@@ -15,19 +16,19 @@ import akka.actor.Status.Failure
  * @author Martin Krasser
  */
 trait ProducerSupport { this: Actor ⇒
-  protected[this] implicit def camel = CamelExtension(context.system)
+  protected[this] implicit def camel = CamelExtension(context.system) // FIXME This is duplicated from Consumer, create a common base-trait?
 
   /**
    * camelContext implicit is useful when using advanced methods of CamelMessage.
    */
-  protected[this] implicit def camelContext = camel.context
+  protected[this] implicit def camelContext = camel.context // FIXME This is duplicated from Consumer, create a common base-trait?
 
-  protected[this] lazy val (endpoint, processor) = camel.registerProducer(self, endpointUri)
+  protected[this] lazy val (endpoint: Endpoint, processor: SendProcessor) = camel.registerProducer(self, endpointUri)
 
   /**
    * CamelMessage headers to copy by default from request message to response-message.
    */
-  private val headersToCopyDefault = Set(CamelMessage.MessageExchangeId)
+  private val headersToCopyDefault: Set[String] = Set(CamelMessage.MessageExchangeId)
 
   /**
    * If set to false (default), this producer expects a response message from the Camel endpoint.
@@ -64,20 +65,21 @@ trait ProducerSupport { this: Actor ⇒
    * @param pattern exchange pattern
    */
   protected def produce(msg: Any, pattern: ExchangePattern): Unit = {
-    implicit def toExchangeAdapter(exchange: Exchange): CamelExchangeAdapter = new CamelExchangeAdapter(exchange)
-
-    val cmsg = CamelMessage.canonicalize(msg)
-    val exchange = endpoint.createExchange(pattern)
-    exchange.setRequest(cmsg)
-    processor.process(exchange, new AsyncCallback {
-      val producer = self
     // Need copies of sender reference here since the callback could be done
     // later by another thread.
+    val producer = self
     val originalSender = sender
+
+    val cmsg = CamelMessage.canonicalize(msg)
+    val xchg = new CamelExchangeAdapter(endpoint.createExchange(pattern))
+
+    xchg.setRequest(cmsg)
+
+    processor.process(xchg.exchange, new AsyncCallback {
       // Ignoring doneSync, sending back async uniformly.
       def done(doneSync: Boolean): Unit = producer.tell(
-        if (exchange.isFailed) exchange.toFailureResult(cmsg.headers(headersToCopy))
-        else MessageResult(exchange.toResponseMessage(cmsg.headers(headersToCopy))), originalSender)
+        if (xchg.exchange.isFailed) xchg.toFailureResult(cmsg.headers(headersToCopy))
+        else MessageResult(xchg.toResponseMessage(cmsg.headers(headersToCopy))), originalSender)
     })
   }
 
@@ -94,9 +96,7 @@ trait ProducerSupport { this: Actor ⇒
       val e = new AkkaCamelException(res.cause, res.headers)
       routeResponse(Failure(e))
       throw e
-    case msg ⇒
-      val exchangePattern = if (oneway) ExchangePattern.InOnly else ExchangePattern.InOut
-      produce(transformOutgoingMessage(msg), exchangePattern)
+    case msg ⇒ produce(transformOutgoingMessage(msg), if (oneway) ExchangePattern.InOnly else ExchangePattern.InOut)
   }
 
   /**
@@ -134,7 +134,7 @@ trait Producer extends ProducerSupport { this: Actor ⇒
    * Default implementation of Actor.receive. Any messages received by this actors
    * will be produced to the endpoint specified by <code>endpointUri</code>.
    */
-  def receive = produce
+  def receive: Actor.Receive = produce
 }
 
 /**
@@ -153,6 +153,6 @@ private case class FailureResult(cause: Throwable, headers: Map[String, Any] = M
  * @author Martin Krasser
  */
 trait Oneway extends Producer { this: Actor ⇒
-  override def oneway = true
+  override def oneway: Boolean = true
 }
 

akka-camel/src/main/scala/akka/camel/internal/ActivationMessage.scala

@@ -20,7 +20,7 @@ private[camel] abstract class ActivationMessage(val actor: ActorRef)
  *
  */
 private[camel] object ActivationMessage {
-  def unapply(msg: ActivationMessage): Option[ActorRef] = Some(msg.actor)
+  def unapply(msg: ActivationMessage): Option[ActorRef] = Option(msg.actor)
 }
 
 /**

akka-camel/src/main/scala/akka/camel/internal/ActivationTracker.scala

@@ -96,17 +96,15 @@ private[akka] final class ActivationTracker extends Actor with ActorLogging {
   /**
    * Subscribes self to messages of type <code>ActivationMessage</code>
    */
-  override def preStart() {
-    context.system.eventStream.subscribe(self, classOf[ActivationMessage])
-  }
+  override def preStart(): Unit = context.system.eventStream.subscribe(self, classOf[ActivationMessage])
 
   override def receive = {
     case msg @ ActivationMessage(ref) ⇒
-      val state = activations.getOrElseUpdate(ref, new ActivationStateMachine)
-      (state.receive orElse logStateWarning(ref))(msg)
+      (activations.getOrElseUpdate(ref, new ActivationStateMachine).receive orElse logStateWarning(ref))(msg)
   }
 
-  private[this] def logStateWarning(actorRef: ActorRef): Receive = { case msg ⇒ log.warning("Message [{}] not expected in current state of actor [{}]", msg, actorRef) }
+  private[this] def logStateWarning(actorRef: ActorRef): Receive =
+    { case msg ⇒ log.warning("Message [{}] not expected in current state of actor [{}]", msg, actorRef) }
 }
 
 /**

akka-camel/src/main/scala/akka/camel/internal/CamelExchangeAdapter.scala

@@ -16,34 +16,34 @@ import akka.camel.{ FailureResult, AkkaCamelException, CamelMessage }
  *
  * @author Martin Krasser
  */
-private[camel] class CamelExchangeAdapter(exchange: Exchange) {
+private[camel] class CamelExchangeAdapter(val exchange: Exchange) {
   /**
    * Returns the exchange id
    */
-  def getExchangeId = exchange.getExchangeId
+  def getExchangeId: String = exchange.getExchangeId
 
   /**
    * Returns if the exchange is out capable.
    */
-  def isOutCapable = exchange.getPattern.isOutCapable
+  def isOutCapable: Boolean = exchange.getPattern.isOutCapable
 
   /**
    * Sets Exchange.getIn from the given CamelMessage object.
    */
-  def setRequest(msg: CamelMessage) { msg.copyContentTo(request) }
+  def setRequest(msg: CamelMessage): Unit = msg.copyContentTo(request)
 
   /**
    * Depending on the exchange pattern, sets Exchange.getIn or Exchange.getOut from the given
    * CamelMessage object. If the exchange is out-capable then the Exchange.getOut is set, otherwise
    * Exchange.getIn.
    */
-  def setResponse(msg: CamelMessage) { msg.copyContentTo(response) }
+  def setResponse(msg: CamelMessage): Unit = msg.copyContentTo(response)
 
   /**
    * Sets Exchange.getException from the given FailureResult message. Headers of the FailureResult message
    * are ignored.
    */
-  def setFailure(msg: FailureResult) { exchange.setException(msg.cause) }
+  def setFailure(msg: FailureResult): Unit = exchange.setException(msg.cause)
 
   /**
    * Creates an immutable CamelMessage object from Exchange.getIn so it can be used with Actors.
@@ -120,7 +120,7 @@ private[camel] class CamelExchangeAdapter(exchange: Exchange) {
    */
   def toResponseMessage(headers: Map[String, Any]): CamelMessage = CamelMessage.from(response, headers)
 
-  private def request = exchange.getIn
+  private def request: JCamelMessage = exchange.getIn
 
   private def response: JCamelMessage = ExchangeHelper.getResultMessage(exchange)
 

akka-camel/src/main/scala/akka/camel/internal/DefaultCamel.scala

@@ -2,12 +2,12 @@ package akka.camel.internal
 
 import akka.actor.ActorSystem
 import component.{ DurationTypeConverter, ActorComponent }
-import org.apache.camel.CamelContext
 import org.apache.camel.impl.DefaultCamelContext
 import scala.Predef._
 import akka.event.Logging
 import akka.camel.Camel
 import akka.util.{ NonFatal, Duration }
+import org.apache.camel.{ ProducerTemplate, CamelContext }
 
 /**
  * For internal use only.
@@ -33,14 +33,14 @@ private[camel] class DefaultCamel(val system: ActorSystem) extends Camel {
     ctx
   }
 
-  lazy val template = context.createProducerTemplate()
+  lazy val template: ProducerTemplate = context.createProducerTemplate()
 
   /**
    * Starts camel and underlying camel context and template.
    * Only the creator of Camel should start and stop it.
    * @see akka.camel.DefaultCamel#stop()
    */
-  def start = {
+  def start(): this.type = {
     context.start()
     try template.start() catch { case NonFatal(e) ⇒ context.stop(); throw e }
     log.debug("Started CamelContext[{}] for ActorSystem[{}]", context.getName, system.name)
@@ -54,9 +54,9 @@ private[camel] class DefaultCamel(val system: ActorSystem) extends Camel {
    *
    * @see akka.camel.DefaultCamel#start()
    */
-  def shutdown() {
+  def shutdown(): Unit = {
     try context.stop() finally {
-      try { template.stop() } catch { case NonFatal(e) ⇒ log.debug("Swallowing non-fatal exception [{}] on stopping Camel producer template", e) }
+      try template.stop() catch { case NonFatal(e) ⇒ log.debug("Swallowing non-fatal exception [{}] on stopping Camel producer template", e) }
     }
     log.debug("Stopped CamelContext[{}] for ActorSystem[{}]", context.getName, system.name)
   }

akka-camel/src/main/scala/akka/camel/internal/ProducerRegistry.scala

@@ -11,6 +11,8 @@ import akka.util.NonFatal
  * Watches the end of life of <code>Producer</code>s.
  * Removes a <code>Producer</code> from the <code>ProducerRegistry</code> when it is <code>Terminated</code>,
  * which in turn stops the <code>SendProcessor</code>.
+ *
+ * INTERNAL API
  */
 private class ProducerWatcher(registry: ProducerRegistry) extends Actor {
   override def receive = {
@@ -19,6 +21,9 @@ private class ProducerWatcher(registry: ProducerRegistry) extends Actor {
   }
 }
 
+/**
+ * INTERNAL API
+ */
 private case class RegisterProducer(actorRef: ActorRef)
 
 /**
@@ -27,14 +32,11 @@ private case class RegisterProducer(actorRef: ActorRef)
  * Every <code>Producer</code> needs an <code>Endpoint</code> and a <code>SendProcessor</code>
  * to produce messages over an <code>Exchange</code>.
  */
-private[camel] trait ProducerRegistry {
-  this: Camel ⇒
+private[camel] trait ProducerRegistry { this: Camel ⇒
   private val camelObjects = new ConcurrentHashMap[ActorRef, (Endpoint, SendProcessor)]()
-  private val watcher = system.actorOf(Props(new ProducerWatcher(this)))
+  private val watcher = system.actorOf(Props(new ProducerWatcher(this))) //FIXME should this really be top level?
 
-  private def registerWatch(actorRef: ActorRef) {
-    watcher ! RegisterProducer(actorRef)
-  }
+  private def registerWatch(actorRef: ActorRef): Unit = watcher ! RegisterProducer(actorRef)
 
   /**
    * For internal use only.
@@ -77,7 +79,7 @@ private[camel] trait ProducerRegistry {
       case NonFatal(e) ⇒ {
         system.eventStream.publish(EndpointFailedToActivate(actorRef, e))
         // can't return null to the producer actor, so blow up actor in initialization.
-        throw e
+        throw e //FIXME I'm not a huge fan of log-rethrow, either log or rethrow
       }
     }
   }

akka-camel/src/main/scala/akka/camel/internal/component/ActorComponent.scala

@@ -35,10 +35,8 @@ private[camel] class ActorComponent(camel: Camel) extends DefaultComponent {
   /**
    * @see org.apache.camel.Component
    */
-  def createEndpoint(uri: String, remaining: String, parameters: JMap[String, Object]): ActorEndpoint = {
-    val path = ActorEndpointPath.fromCamelPath(remaining)
-    new ActorEndpoint(uri, this, path, camel)
-  }
+  def createEndpoint(uri: String, remaining: String, parameters: JMap[String, Object]): ActorEndpoint =
+    new ActorEndpoint(uri, this, ActorEndpointPath.fromCamelPath(remaining), camel)
 }
 
 /**
@@ -92,7 +90,7 @@ private[camel] class ActorEndpoint(uri: String,
 private[camel] trait ActorEndpointConfig {
   def path: ActorEndpointPath
 
-  @BeanProperty var replyTimeout: Duration = 1 minute
+  @BeanProperty var replyTimeout: Duration = 1 minute // FIXME default should be in config, not code
 
   /**
    * Whether to auto-acknowledge one-way message exchanges with (untyped) actors. This is
@@ -117,7 +115,7 @@ private[camel] class ActorProducer(val endpoint: ActorEndpoint, camel: Camel) ex
    * Calls the asynchronous version of the method and waits for the result (blocking).
    * @param exchange the exchange to process
    */
-  def process(exchange: Exchange) { processExchangeAdapter(new CamelExchangeAdapter(exchange)) }
+  def process(exchange: Exchange): Unit = processExchangeAdapter(new CamelExchangeAdapter(exchange))
 
   /**
    * Processes the message exchange. the caller supports having the exchange asynchronously processed.
@@ -129,13 +127,15 @@ private[camel] class ActorProducer(val endpoint: ActorEndpoint, camel: Camel) ex
    *        The callback should therefore be careful of starting recursive loop.
    * @return (doneSync) true to continue execute synchronously, false to continue being executed asynchronously
    */
-  def process(exchange: Exchange, callback: AsyncCallback): Boolean = { processExchangeAdapter(new CamelExchangeAdapter(exchange), callback) }
+  def process(exchange: Exchange, callback: AsyncCallback): Boolean = processExchangeAdapter(new CamelExchangeAdapter(exchange), callback)
 
   /**
    * For internal use only. Processes the [[akka.camel.internal.CamelExchangeAdapter]]
    * @param exchange the [[akka.camel.internal.CamelExchangeAdapter]]
+   *
+   * WARNING UNBOUNDED BLOCKING AWAITS
    */
-  private[camel] def processExchangeAdapter(exchange: CamelExchangeAdapter) {
+  private[camel] def processExchangeAdapter(exchange: CamelExchangeAdapter): Unit = {
     val isDone = new CountDownLatch(1)
     processExchangeAdapter(exchange, new AsyncCallback { def done(doneSync: Boolean) { isDone.countDown() } })
     isDone.await() // this should never wait forever as the process(exchange, callback) method guarantees that.
@@ -151,10 +151,10 @@ private[camel] class ActorProducer(val endpoint: ActorEndpoint, camel: Camel) ex
   private[camel] def processExchangeAdapter(exchange: CamelExchangeAdapter, callback: AsyncCallback): Boolean = {
 
     // these notify methods are just a syntax sugar
-    def notifyDoneSynchronously[A](a: A = null) = callback.done(true)
-    def notifyDoneAsynchronously[A](a: A = null) = callback.done(false)
+    def notifyDoneSynchronously[A](a: A = null): Unit = callback.done(true)
+    def notifyDoneAsynchronously[A](a: A = null): Unit = callback.done(false)
 
-    def message = messageFor(exchange)
+    def message: CamelMessage = messageFor(exchange)
 
     if (exchange.isOutCapable) { //InOut
       sendAsync(message, onComplete = forwardResponseTo(exchange) andThen notifyDoneAsynchronously)
@@ -186,39 +186,29 @@ private[camel] class ActorProducer(val endpoint: ActorEndpoint, camel: Camel) ex
 
   private def sendAsync(message: CamelMessage, onComplete: PartialFunction[Either[Throwable, Any], Unit]): Boolean = {
     try {
-      val actor = actorFor(endpoint.path)
-      val future = actor.ask(message)(new Timeout(endpoint.replyTimeout))
-      future.onComplete(onComplete)
+      actorFor(endpoint.path).ask(message)(Timeout(endpoint.replyTimeout)).onComplete(onComplete)
     } catch {
       case NonFatal(e) ⇒ onComplete(Left(e))
     }
     false // Done async
   }
 
-  private def fireAndForget(message: CamelMessage, exchange: CamelExchangeAdapter) {
-    try {
-      actorFor(endpoint.path) ! message
-    } catch {
-      case e ⇒ exchange.setFailure(new FailureResult(e))
-    }
-  }
+  private def fireAndForget(message: CamelMessage, exchange: CamelExchangeAdapter): Unit =
+    try { actorFor(endpoint.path) ! message } catch { case NonFatal(e) ⇒ exchange.setFailure(new FailureResult(e)) }
 
   private[this] def actorFor(path: ActorEndpointPath): ActorRef =
     path.findActorIn(camel.system) getOrElse (throw new ActorNotRegisteredException(path.actorPath))
 
   private[this] def messageFor(exchange: CamelExchangeAdapter) =
     exchange.toRequestMessage(Map(CamelMessage.MessageExchangeId -> exchange.getExchangeId))
-
 }
 
 /**
  * For internal use only. Converts Strings to [[akka.util.Duration]]s
  */
 private[camel] object DurationTypeConverter extends TypeConverter {
-  def convertTo[T](`type`: Class[T], value: AnyRef) = {
-    Duration(value.toString).asInstanceOf[T]
-  }
-  def convertTo[T](`type`: Class[T], exchange: Exchange, value: AnyRef) = convertTo(`type`, value)
+  def convertTo[T](`type`: Class[T], value: AnyRef) = Duration(value.toString).asInstanceOf[T] //FIXME WTF
+  def convertTo[T](`type`: Class[T], exchange: Exchange, value: AnyRef): T = convertTo(`type`, value)
   def mandatoryConvertTo[T](`type`: Class[T], value: AnyRef) = convertTo(`type`, value)
   def mandatoryConvertTo[T](`type`: Class[T], exchange: Exchange, value: AnyRef) = convertTo(`type`, value)
   def toString(duration: Duration) = duration.toNanos + " nanos"
@@ -243,15 +233,15 @@ private[camel] case class ActorEndpointPath private (actorPath: String) {
  * For internal use only. Companion of `ActorEndpointPath`
  */
 private[camel] object ActorEndpointPath {
-  private val consumerConfig = new ConsumerConfig {}
+  private val consumerConfig: ConsumerConfig = new ConsumerConfig {}
 
-  def apply(actorRef: ActorRef) = new ActorEndpointPath(actorRef.path.toString)
+  def apply(actorRef: ActorRef): ActorEndpointPath = new ActorEndpointPath(actorRef.path.toString)
 
   /**
    * Creates an [[akka.camel.internal.component.ActorEndpointPath]] from the remaining part of the endpoint URI (the part after the scheme, without the parameters of the URI).
    * Expects the remaining part of the URI (the actor path) in a format: path:%s
    */
-  def fromCamelPath(camelPath: String) = camelPath match {
+  def fromCamelPath(camelPath: String): ActorEndpointPath = camelPath match {
     case id if id startsWith "path:" ⇒ new ActorEndpointPath(id substring 5)
     case _                           ⇒ throw new IllegalArgumentException("Invalid path: [%s] - should be path:<actorPath>" format camelPath)
   }

akka-camel/src/main/scala/akka/camel/javaapi/UntypedConsumer.scala

@@ -13,7 +13,7 @@ import org.apache.camel.{ ProducerTemplate, CamelContext }
  * class is meant to be used from Java.
  */
 abstract class UntypedConsumerActor extends UntypedActor with Consumer {
-  final def endpointUri = getEndpointUri
+  final def endpointUri: String = getEndpointUri
 
   /**
    * Returns the Camel endpoint URI to consume messages from.

akka-camel/src/main/scala/akka/camel/javaapi/UntypedProducerActor.scala

@@ -40,16 +40,14 @@ abstract class UntypedProducerActor extends UntypedActor with ProducerSupport {
   final override def transformResponse(msg: Any): AnyRef = onTransformResponse(msg.asInstanceOf[AnyRef])
   final override def routeResponse(msg: Any): Unit = onRouteResponse(msg.asInstanceOf[AnyRef])
 
-  final override def endpointUri = getEndpointUri
+  final override def endpointUri: String = getEndpointUri
 
-  final override def oneway = isOneway
+  final override def oneway: Boolean = isOneway
 
   /**
    * Default implementation of UntypedActor.onReceive
    */
-  def onReceive(message: Any) {
-    produce(message)
-  }
+  def onReceive(message: Any): Unit = produce(message)
 
   /**
    * Returns the Camel endpoint URI to produce messages to.
@@ -61,7 +59,7 @@ abstract class UntypedProducerActor extends UntypedActor with ProducerSupport {
    * If set to true, this producer communicates with the Camel endpoint with an in-only message
    * exchange pattern (fire and forget).
    */
-  def isOneway() = super.oneway
+  def isOneway(): Boolean = super.oneway
 
   /**
    * Returns the <code>CamelContext</code>.

akka-camel/src/main/scala/akka/package.scala

@@ -7,5 +7,6 @@ package akka
 import org.apache.camel.model.ProcessorDefinition
 
 package object camel {
+  //TODO Why do I exist?
   implicit def toActorRouteDefinition(definition: ProcessorDefinition[_]) = new ActorRouteDefinition(definition)
 }