Remove procedure syntax (#25362)

akka-docs/src/test/scala/docs/actor/ActorDocSpec.scala

@@ -123,13 +123,13 @@ class ActorWithMessagesWrapper {
 class Hook extends Actor {
   var child: ActorRef = _
   //#preStart
-  override def preStart() {
+  override def preStart(): Unit = {
     child = context.actorOf(Props[MyActor], "child")
   }
   //#preStart
   def receive = Actor.emptyBehavior
   //#postStop
-  override def postStop() {
+  override def postStop(): Unit = {
     //#clean-up-some-resources
     ()
     //#clean-up-some-resources

akka-docs/src/test/scala/docs/actor/FSMDocSpec.scala

@@ -125,7 +125,7 @@ class FSMDocSpec extends MyFavoriteTestFrameWorkPlusAkkaTestKit {
       //#alt-transition-syntax
       onTransition(handler _)
 
-      def handler(from: StateType, to: StateType) {
+      def handler(from: StateType, to: StateType): Unit = {
         // handle it here ...
       }
       //#alt-transition-syntax

akka-docs/src/test/scala/docs/actor/FaultHandlingDocSample.scala

@@ -149,7 +149,7 @@ class CounterService extends Actor {
 
   import context.dispatcher // Use this Actors' Dispatcher as ExecutionContext
 
-  override def preStart() {
+  override def preStart(): Unit = {
     initStorage()
   }
 
@@ -159,7 +159,7 @@ class CounterService extends Actor {
    * failing. When it has been stopped we will schedule a Reconnect after a delay.
    * Watch the child so we receive Terminated message when it has been terminated.
    */
-  def initStorage() {
+  def initStorage(): Unit = {
     storage = Some(context.watch(context.actorOf(Props[Storage], name = "storage")))
     // Tell the counter, if any, to use the new storage
     counter foreach { _ ! UseStorage(storage) }
@@ -197,7 +197,7 @@ class CounterService extends Actor {
       initStorage()
   }
 
-  def forwardOrPlaceInBacklog(msg: Any) {
+  def forwardOrPlaceInBacklog(msg: Any): Unit = {
     // We need the initial value from storage before we can start delegate to
     // the counter. Before that we place the messages in a backlog, to be sent
     // to the counter when it is initialized.
@@ -246,7 +246,7 @@ class Counter(key: String, initialValue: Long) extends Actor {
 
   }
 
-  def storeCount() {
+  def storeCount(): Unit = {
     // Delegate dangerous work, to protect our valuable state.
     // We can continue without storage.
     storage foreach { _ ! Store(Entry(key, count)) }

akka-docs/src/test/scala/docs/actor/FaultHandlingDocSpec.scala

@@ -62,7 +62,7 @@ object FaultHandlingDocSpec {
       case p: Props ⇒ sender() ! context.actorOf(p)
     }
     // override default to kill all children during restart
-    override def preRestart(cause: Throwable, msg: Option[Any]) {}
+    override def preRestart(cause: Throwable, msg: Option[Any]): Unit = {}
   }
   //#supervisor2
 
@@ -113,7 +113,7 @@ class FaultHandlingDocSpec(_system: ActorSystem) extends TestKit(_system)
       }
       """)))
 
-  override def afterAll {
+  override def afterAll: Unit = {
     TestKit.shutdownActorSystem(system)
   }
 

akka-docs/src/test/scala/docs/actor/UnnestedReceives.scala

@@ -22,11 +22,11 @@ class UnnestedReceives extends Actor {
   //This message processes a message/event
   def process(msg: Any): Unit = println("processing: " + msg)
   //This method subscribes the actor to the event bus
-  def subscribe() {} //Your external stuff
+  def subscribe(): Unit = {} //Your external stuff
   //This method retrieves all prior messages/events
   def allOldMessages() = List()
 
-  override def preStart {
+  override def preStart: Unit = {
     //We override preStart to be sure that the first message the actor gets is
     //'Replay, that message will start to be processed _after_ the actor is started
     self ! 'Replay

akka-docs/src/test/scala/docs/camel/CustomRoute.scala

@@ -27,7 +27,7 @@ object CustomRoute {
 
     class CustomRouteBuilder(system: ActorSystem, responder: ActorRef)
       extends RouteBuilder {
-      def configure {
+      def configure: Unit = {
         from("jetty:http://localhost:8877/camel/custom").to(responder)
       }
     }
@@ -52,7 +52,7 @@ object CustomRoute {
       override def onRouteDefinition = (rd) ⇒ rd.onException(classOf[Exception]).
         handled(true).transform(Builder.exceptionMessage).end
 
-      final override def preRestart(reason: Throwable, message: Option[Any]) {
+      final override def preRestart(reason: Throwable, message: Option[Any]): Unit = {
         sender() ! Failure(reason)
       }
     }

akka-docs/src/test/scala/docs/camel/Producers.scala

@@ -45,7 +45,7 @@ object Producers {
     class Forwarder(uri: String, target: ActorRef) extends Actor with Producer {
       def endpointUri = uri
 
-      override def routeResponse(msg: Any) { target forward msg }
+      override def routeResponse(msg: Any): Unit = { target forward msg }
     }
     val system = ActorSystem("some-system")
     val receiver = system.actorOf(Props[ResponseReceiver])

akka-docs/src/test/scala/docs/dispatcher/MyUnboundedMailbox.scala

@@ -28,7 +28,7 @@ object MyUnboundedMailbox {
     def dequeue(): Envelope = queue.poll()
     def numberOfMessages: Int = queue.size
     def hasMessages: Boolean = !queue.isEmpty
-    def cleanUp(owner: ActorRef, deadLetters: MessageQueue) {
+    def cleanUp(owner: ActorRef, deadLetters: MessageQueue): Unit = {
       while (hasMessages) {
         deadLetters.enqueue(owner, dequeue())
       }

akka-docs/src/test/scala/docs/event/LoggingDocSpec.scala

@@ -17,7 +17,7 @@ object LoggingDocSpec {
     override def preStart() = {
       log.debug("Starting")
     }
-    override def preRestart(reason: Throwable, message: Option[Any]) {
+    override def preRestart(reason: Throwable, message: Option[Any]): Unit = {
       log.error(reason, "Restarting due to [{}] when processing [{}]",
         reason.getMessage, message.getOrElse(""))
     }

akka-docs/src/test/scala/docs/io/ScalaUdpMulticast.scala

@@ -22,7 +22,7 @@ final case class Inet6ProtocolFamily() extends DatagramChannelCreator {
 
 //#multicast-group
 final case class MulticastGroup(address: String, interface: String) extends SocketOptionV2 {
-  override def afterBind(s: DatagramSocket) {
+  override def afterBind(s: DatagramSocket): Unit = {
     val group = InetAddress.getByName(address)
     val networkInterface = NetworkInterface.getByName(interface)
     s.getChannel.join(group, networkInterface)

akka-docs/src/test/scala/docs/persistence/PersistencePluginDocSpec.scala

@@ -234,12 +234,12 @@ object PersistenceTCKDoc {
         new File(system.settings.config.getString("akka.persistence.journal.leveldb.dir")),
         new File(config.getString("akka.persistence.snapshot-store.local.dir")))
 
-      override def beforeAll() {
+      override def beforeAll(): Unit = {
         super.beforeAll()
         storageLocations foreach FileUtils.deleteRecursively
       }
 
-      override def afterAll() {
+      override def afterAll(): Unit = {
         storageLocations foreach FileUtils.deleteRecursively
         super.afterAll()
       }

akka-docs/src/test/scala/docs/remoting/RemoteDeploymentDocSpec.scala

@@ -31,7 +31,7 @@ class RemoteDeploymentDocSpec extends AkkaSpec("""
   val other = ActorSystem("remote", system.settings.config)
   val address = other.asInstanceOf[ExtendedActorSystem].provider.getExternalAddressFor(Address("akka.tcp", "s", "host", 1)).get
 
-  override def afterTermination() { shutdown(other) }
+  override def afterTermination(): Unit = { shutdown(other) }
 
   "demonstrate programmatic deployment" in {
     //#deploy

akka-docs/src/test/scala/docs/testkit/PlainWordSpec.scala

@@ -14,7 +14,7 @@ class MySpec() extends TestKit(ActorSystem("MySpec")) with ImplicitSender
   with WordSpecLike with Matchers with BeforeAndAfterAll {
   //#implicit-sender
 
-  override def afterAll {
+  override def afterAll: Unit = {
     TestKit.shutdownActorSystem(system)
   }
 

akka-docs/src/test/scala/docs/testkit/TestKitUsageSpec.scala

@@ -44,7 +44,7 @@ class TestKitUsageSpec
   val seqRef =
     system.actorOf(Props(classOf[SequencingActor], testActor, headList, tailList))
 
-  override def afterAll {
+  override def afterAll: Unit = {
     shutdown()
   }