Prototype of cluster aware routers, see #2103

* Several FIXME that needs to be discussed
* ClusterRouterConfig created via ClusterActorRefProvider

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

@@ -0,0 +1,61 @@
+/**
+ * Copyright (C) 2009-2012 Typesafe Inc. <http://www.typesafe.com>
+ */
+package akka.cluster
+
+import akka.actor.ActorSystem
+import akka.actor.DynamicAccess
+import akka.actor.Scheduler
+import akka.event.EventStream
+import akka.remote.RemoteActorRefProvider
+import akka.remote.RemoteDeployer
+import akka.actor.Deploy
+import com.typesafe.config.Config
+import akka.ConfigurationException
+import akka.actor.NoScopeGiven
+import akka.routing.RemoteRouterConfig
+import akka.cluster.routing.ClusterRouterConfig
+import akka.actor.Scope
+
+class ClusterActorRefProvider(
+  _systemName: String,
+  _settings: ActorSystem.Settings,
+  _eventStream: EventStream,
+  _scheduler: Scheduler,
+  _dynamicAccess: DynamicAccess) extends RemoteActorRefProvider(
+  _systemName, _settings, _eventStream, _scheduler, _dynamicAccess) {
+
+  override val deployer: RemoteDeployer = new ClusterDeployer(settings, dynamicAccess)
+
+}
+
+private[akka] class ClusterDeployer(_settings: ActorSystem.Settings, _pm: DynamicAccess) extends RemoteDeployer(_settings, _pm) {
+  override def parseConfig(path: String, config: Config): Option[Deploy] = {
+    super.parseConfig(path, config) match {
+      case d @ Some(deploy) ⇒
+        if (deploy.config.getBoolean("cluster")) {
+          if (deploy.scope != NoScopeGiven)
+            throw new ConfigurationException("Cluster deployment can't be combined with scope [%s]".format(deploy.scope))
+          if (deploy.routerConfig.isInstanceOf[RemoteRouterConfig])
+            throw new ConfigurationException("Cluster deployment can't be combined with [%s]".format(deploy.routerConfig))
+          Some(deploy.copy(routerConfig = ClusterRouterConfig(deploy.routerConfig)))
+        } else d
+      case None ⇒ None
+    }
+  }
+}
+
+@SerialVersionUID(1L)
+abstract class ClusterScope extends Scope
+
+/**
+ * Cluster aware scope of a [[akka.actor.Deploy]]
+ */
+case object ClusterScope extends ClusterScope {
+  /**
+   * Java API: get the singleton instance
+   */
+  def getInstance = this
+
+  def withFallback(other: Scope): Scope = this
+}