SpawnProtocol

java.lang.Object
- akka.actor.typed.SpawnProtocol

```
public class SpawnProtocol
extends java.lang.Object
```
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 apply() or 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 ActorRefFactory.actorOf(akka.actor.Props) 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.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static interface`	`SpawnProtocol.Command`	Not for user extension
`static class`	`SpawnProtocol.Spawn<T>`	Spawn a child actor with the given `behavior` and send back the `ActorRef` of that child to the given `replyTo` destination.
`static class`	`SpawnProtocol.Spawn$`

Constructor Summary

Constructors
Constructor Description

SpawnProtocol()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static Behavior<SpawnProtocol.Command>`	`apply()`	Scala API: returns a behavior that can be commanded to spawn arbitrary children.
`static Behavior<SpawnProtocol.Command>`	`create()`	Java API: returns a behavior that can be commanded to spawn arbitrary children.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SpawnProtocol
```
public SpawnProtocol()
```
- Method Detail
  - create
```
public static Behavior<SpawnProtocol.Command> create()
```
    Java API: returns a behavior that can be commanded to spawn arbitrary children.
  - apply
```
public static Behavior<SpawnProtocol.Command> apply()
```
    Scala API: returns a behavior that can be commanded to spawn arbitrary children.