Added outline on how to implement clustered deployment

.gitignore

@@ -50,3 +50,4 @@ akka-docs/_build/
 akka-tutorials/akka-tutorial-first/project/boot/
 akka-tutorials/akka-tutorial-first/project/plugins/project/
 akka-docs/exts/
+_akka_cluster/

akka-actor/src/main/scala/akka/actor/Actor.scala

@@ -206,8 +206,20 @@ object Actor extends ListenerManagement {
         newLocalActorRef(clazz, address)
 
       case Deploy(_, router, Clustered(Home(hostname, port), replication  , state)) =>
+        sys.error("Clustered deployment not yet supported")
+        /*
+        if (Actor.remote.isRunning) throw new IllegalStateException("Remote server is not running")
+        val remoteAddress = Actor.remote.address
+        if (remoteAddress.getHostName == hostname && remoteAddress.getPort == port) {
+          // home node for actor
+          if (!node.isClustered(address)) node.store(clazz, address)
+          node.use(address).head
+        } else {
+          val router  =
+          node.ref(address, router)
+        }
+        */
         /*
-          1. Check ZK for deployment config
           2. Check Home(..)
             a) If home is same as Actor.remote.address then:
               - check if actor is stored in ZK, if not; node.store(..)
@@ -216,7 +228,6 @@ object Actor extends ListenerManagement {
               - check out actor using node.ref(..)
 
           Misc stuff:
-            - Manage deployment in ZK
             - How to define a single ClusterNode to use? Where should it be booted up? How should it be configured?
             - Deployer should:
               1. Check if deployment exists in ZK

akka-actor/src/main/scala/akka/actor/Deployer.scala

@@ -143,10 +143,6 @@ object Deployer {
   lazy val cluster            = ReflectiveAccess.ClusterModule.clusterDeployer
   lazy val local              = new LocalDeployer
 
-  def deploy(deployment: Seq[Deploy]) {
-    deployment foreach (deploy(_))
-  }
-
   def deploy(deployment: Deploy) {
     if (deployment eq null) throw new IllegalArgumentException("Deploy can not be null")
     val address = deployment.address
@@ -155,6 +151,10 @@ object Deployer {
     else                    local.deploy(deployment)
   }
 
+  def deploy(deployment: Seq[Deploy]) {
+    deployment foreach (deploy(_))
+  }
+
   private def deployLocally(deployment: Deploy) {
     deployment match {
       case Deploy(address, Direct, Clustered(Home(hostname, port), _, _)) =>

akka-cluster/src/main/scala/akka/cluster/Cluster.scala

@@ -561,7 +561,7 @@ class ClusterNode private[akka] (
   /**
    * Explicitly resign from being a leader. If this node is not a leader then this operation is a no-op.
    */
-  def resign = if (isLeader.get) leaderLock.unlock
+  def resign() { if (isLeader.get) leaderLock.unlock }
 
   // =======================================
   // Actor