akka.actor

Class ExtensionKey<T extends Extension>

java.lang.Object

akka.actor.ExtensionKey<T>

All Implemented Interfaces:

ExtensionId<T>, ExtensionIdProvider

Direct Known Subclasses:

Logging.Extension$

public abstract class ExtensionKey<T extends Extension>
extends java.lang.Object
implements ExtensionId<T>, ExtensionIdProvider

This is a one-stop-shop if all you want is an extension which is constructed with the ExtendedActorSystem as its only constructor argument:

 object MyExt extends ExtensionKey[Ext]

 class Ext(system: ExtendedActorSystem) extends Extension {
   ...
 }
 

Java API:

 public class MyExt extends Extension {
   public static final ExtensionKey<MyExt> key = new ExtensionKey<MyExt>(MyExt.class);

   public MyExt(ExtendedActorSystem system) {
     ...
   }
 }
 

Note: Don't use this class if the extension is written in Scala and consumed in Eclipse Java projects. JDT has problems resolving correct type for the get method.

Constructor Summary

Constructors

Constructor and Description
ExtensionKey(java.lang.Class<T> clazz)
ExtensionKey(scala.reflect.ClassTag<T> m)

Method Summary

Methods

Modifier and Type	Method and Description
T	createExtension(ExtendedActorSystem system) Is used by Akka to instantiate the Extension identified by this ExtensionId, internal use only.
ExtensionId<T>	lookup() Returns the canonical ExtensionId for this Extension

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface akka.actor.ExtensionId

apply, equals, get, hashCode

Constructor Detail

ExtensionKey

public ExtensionKey(scala.reflect.ClassTag<T> m)

ExtensionKey

public ExtensionKey(java.lang.Class<T> clazz)

Method Detail

lookup

public ExtensionId<T> lookup()

Description copied from interface: ExtensionIdProvider

Returns the canonical ExtensionId for this Extension

Specified by:

lookup in interface ExtensionIdProvider

createExtension

public T createExtension(ExtendedActorSystem system)

Description copied from interface: ExtensionId

Is used by Akka to instantiate the Extension identified by this ExtensionId, internal use only.

Specified by:

createExtension in interface ExtensionId<T extends Extension>