Akka 与 OSGi

Configuring the OSGi Framework

To use Akka in an OSGi environment, the org.osgi.framework.bootdelegation property must be set to always delegate the sun.misc package to the boot classloader instead of resolving it through the normal OSGi class space.

Activator

To bootstrap Akka inside an OSGi environment, you can use the akka.osgi.ActorSystemActivator class to conveniently set up the ActorSystem.

import akka.actor.{ Props, ActorSystem }
import org.osgi.framework.BundleContext
import akka.osgi.ActorSystemActivator

class Activator extends ActorSystemActivator {

  def configure(context: BundleContext, system: ActorSystem) {
    // optionally register the ActorSystem in the OSGi Service Registry
    registerService(context, system)

    val someActor = system.actorOf(Props[SomeActor], name = "someName")
    someActor ! SomeMessage
  }

}

The ActorSystemActivator creates the actor system with a class loader that finds resources (reference.conf files) and classes from the application bundle and all transitive dependencies.

The ActorSystemActivator class is included in the akka-osgi artifact::

  <dependency>
    <groupId>com.typesafe.akka</groupId>
    <artifactId>akka-osgi_@binVersion@</artifactId>
    <version>@version@</version>
  </dependency>

Sample

A complete sample project is provided in akka-sample-osgi-dining-hakkers.