object SpawnProtocol
A message protocol for actors that support spawning a child actor when receiving a SpawnProtocol#Spawn message and sending back the ActorRef of the child actor. Create instances through the SpawnProtocol#apply or SpawnProtocol#create factory methods.
The typical usage of this is to use it as the guardian actor of the ActorSystem, possibly combined with
Behaviors.setup to starts some initial tasks or actors. Child actors can then be started from the outside
by telling or asking SpawnProtocol#Spawn to the actor reference of the system. When using ask this is
similar to how akka.actor.ActorSystem#actorOf can be used in classic actors with the difference that
a Future / CompletionStage of the ActorRef is returned.
Stopping children is done through specific support in the protocol of the children, or stopping the entire spawn protocol actor.
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- SpawnProtocol.scala
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- sealed trait Command extends AnyRef
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Not for user extension
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- @DoNotInherit()
- final case class Spawn[T](behavior: Behavior[T], name: String, props: Props, replyTo: ActorRef[ActorRef[T]]) extends Command with Product with Serializable
Spawn a child actor with the given
behaviorand send back theActorRefof that child to the givenreplyTodestination.Spawn a child actor with the given
behaviorand send back theActorRefof that child to the givenreplyTodestination.If
nameis an empty string an anonymous actor (with automatically generated name) will be created.If the
nameis already taken of an existing actor a unique name will be used by appending a suffix to the thename. The exact format or value of the suffix is an implementation detail that is undefined. This means that reusing the same name for several actors will not result inInvalidActorNameException, but it's better to use unique names to begin with.
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- def apply(): Behavior[Command]
Scala API: returns a behavior that can be commanded to spawn arbitrary children.
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- def create(): Behavior[Command]
Java API: returns a behavior that can be commanded to spawn arbitrary children.
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