final class ClusterReceptionist extends Actor with ActorLogging

ClusterClient connects to this actor to retrieve. The ClusterReceptionist is supposed to be started on all nodes, or all nodes with specified role, in the cluster. The receptionist can be started with the ClusterClientReceptionist or as an ordinary actor (use the factory method ClusterReceptionist#props).

The receptionist forwards messages from the client to the associated akka.cluster.pubsub.DistributedPubSubMediator, i.e. the client can send messages to any actor in the cluster that is registered in the DistributedPubSubMediator. Messages from the client are wrapped in akka.cluster.pubsub.DistributedPubSubMediator.Send, akka.cluster.pubsub.DistributedPubSubMediator.SendToAll or akka.cluster.pubsub.DistributedPubSubMediator.Publish with the semantics described in akka.cluster.pubsub.DistributedPubSubMediator.

Response messages from the destination actor are tunneled via the receptionist to avoid inbound connections from other cluster nodes to the client, i.e. the sender(), as seen by the destination actor, is not the client itself. The sender() of the response messages, as seen by the client, is deadLetters since the client should normally send subsequent messages via the ClusterClient. It is possible to pass the original sender inside the reply messages if the client is supposed to communicate directly to the actor in the cluster.

Source
ClusterClient.scala
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Instance Constructors

  1. new ClusterReceptionist(pubSubMediator: ActorRef, settings: ClusterReceptionistSettings)

Type Members

  1. type Receive = PartialFunction[Any, Unit]
    Definition Classes
    Actor

Value Members

  1. val checkDeadlinesTask: Cancellable
  2. var clientInteractions: HashMap[ActorRef, DeadlineFailureDetector]
  3. var clientsPublished: HashSet[ActorRef]
  4. val cluster: Cluster
  5. var consistentHash: ConsistentHash[Address]
  6. implicit val context: ActorContext

    Scala API: Stores the context for this actor, including self, and sender.

    Scala API: Stores the context for this actor, including self, and sender. It is implicit to support operations such as forward.

    WARNING: Only valid within the Actor itself, so do not close over it and publish it to other threads!

    akka.actor.ActorContext is the Scala API. getContext returns a akka.actor.AbstractActor.ActorContext, which is the Java API of the actor context.

    Definition Classes
    Actor
  7. def log: LoggingAdapter
    Definition Classes
    ActorLogging
  8. def matchingRole(m: Member): Boolean
  9. var nodes: SortedSet[Address]
  10. def postRestart(reason: Throwable): Unit

    User overridable callback: By default it calls preStart().

    User overridable callback: By default it calls preStart().

    reason

    the Throwable that caused the restart to happen Is called right AFTER restart on the newly created Actor to allow reinitialization after an Actor crash.

    Definition Classes
    Actor
    Annotations
    @throws( classOf[Exception] )
  11. def postStop(): Unit

    User overridable callback.

    User overridable callback.

    Is called asynchronously after 'actor.stop()' is invoked. Empty default implementation.

    Definition Classes
    ClusterReceptionistActor
  12. def preRestart(reason: Throwable, message: Option[Any]): Unit

    Scala API: User overridable callback: By default it disposes of all children and then calls postStop().

    Scala API: User overridable callback: By default it disposes of all children and then calls postStop().

    reason

    the Throwable that caused the restart to happen

    message

    optionally the current message the actor processed when failing, if applicable Is called on a crashed Actor right BEFORE it is restarted to allow clean up of resources before Actor is terminated.

    Definition Classes
    Actor
    Annotations
    @throws( classOf[Exception] )
  13. def preStart(): Unit

    User overridable callback.

    User overridable callback.

    Is called when an Actor is started. Actors are automatically started asynchronously when created. Empty default implementation.

    Definition Classes
    ClusterReceptionistActor
  14. def publishClientsUnreachable(): Unit
  15. def receive: PartialFunction[Any, Unit]

    Scala API: This defines the initial actor behavior, it must return a partial function with the actor logic.

    Scala API: This defines the initial actor behavior, it must return a partial function with the actor logic.

    Definition Classes
    ClusterReceptionistActor
  16. def responseTunnel(client: ActorRef): ActorRef
  17. implicit final val self: ActorRef

    The 'self' field holds the ActorRef for this actor.

    The 'self' field holds the ActorRef for this actor.

    Can be used to send messages to itself:

    self ! message
    

    Definition Classes
    Actor
  18. final def sender(): ActorRef

    The reference sender Actor of the last received message.

    The reference sender Actor of the last received message. Is defined if the message was sent from another Actor, else deadLetters in akka.actor.ActorSystem.

    WARNING: Only valid within the Actor itself, so do not close over it and publish it to other threads!

    Definition Classes
    Actor
  19. var subscribers: Vector[ActorRef]
  20. def supervisorStrategy: SupervisorStrategy

    User overridable definition the strategy to use for supervising child actors.

    User overridable definition the strategy to use for supervising child actors.

    Definition Classes
    Actor
  21. def unhandled(message: Any): Unit

    User overridable callback.

    User overridable callback.

    Is called when a message isn't handled by the current behavior of the actor by default it fails with either a akka.actor.DeathPactException (in case of an unhandled akka.actor.Terminated message) or publishes an akka.actor.UnhandledMessage to the actor's system's akka.event.EventStream

    Definition Classes
    Actor
  22. def updateClientInteractions(client: ActorRef): Unit
  23. val verboseHeartbeat: Boolean
  24. val virtualNodesFactor: Int