Package org.apache.pekko.actor.typed

Interface Extensions

All Known Subinterfaces:
ExtensionsImpl
All Known Implementing Classes:
ActorSystem
public interface Extensions
API for registering and looking up extensions.

Not for user extension.

  • Method Summary

    Modifier and Type
    Method
    Description
    <T extends Extension>
    T
    extension(ExtensionId<T> ext)
    Returns the payload that is associated with the provided extension throws an IllegalStateException if it is not registered.
    boolean
    hasExtension(ExtensionId<? extends Extension> ext)
    Returns whether the specified extension is already registered, this method can potentially block, waiting for the initialization of the payload, if is in the process of registration from another Thread of execution
    <T extends Extension>
    T
    registerExtension(ExtensionId<T> ext)
    Registers the provided extension and creates its payload, if this extension isn't already registered This method has putIfAbsent-semantics, this method can potentially block, waiting for the initialization of the payload, if is in the process of registration from another Thread of execution

  • Method Details

    • extension

      <T extends Extension> T extension(ExtensionId<T> ext)
      Returns the payload that is associated with the provided extension throws an IllegalStateException if it is not registered. This method can potentially block, waiting for the initialization of the payload, if is in the process of registration from another Thread of execution

    • hasExtension

      boolean hasExtension(ExtensionId<? extends Extension> ext)
      Returns whether the specified extension is already registered, this method can potentially block, waiting for the initialization of the payload, if is in the process of registration from another Thread of execution

    • registerExtension

      <T extends Extension> T registerExtension(ExtensionId<T> ext)
      Registers the provided extension and creates its payload, if this extension isn't already registered This method has putIfAbsent-semantics, this method can potentially block, waiting for the initialization of the payload, if is in the process of registration from another Thread of execution