Akka/Scala example source code file (Activator.scala)

This example Akka source code file (Activator.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

activator, actor, akka, bundleactivator, bundlecontext, command, dininghakkersservice, none, option, poisonpill, servicetracker, string

The Activator.scala Akka example source code

/*
Copyright 2013 Crossing-Tech

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
   limitations under the License.
 */
package akka.sample.osgi.command

import org.osgi.framework.{ ServiceEvent, BundleContext, BundleActivator }
import akka.sample.osgi.api.DiningHakkersService
import akka.actor.{ ActorRef, PoisonPill }
import org.osgi.util.tracker.ServiceTracker

class Activator extends BundleActivator {
  println("Command Activator created")
  var hakker: Option[ActorRef] = None

  def start(context: BundleContext) {
    val logServiceTracker = new ServiceTracker(context, classOf[DiningHakkersService].getName, null)
    logServiceTracker.open()
    val service = Option(logServiceTracker.getService.asInstanceOf[DiningHakkersService])
    service.foreach(startHakker(_, context.getBundle.getSymbolicName + ":" + context.getBundle.getBundleId))
  }

  def startHakker(service: DiningHakkersService, name: String) {
    hakker = Some(service.getHakker(name, 4))
  }

  def stop(context: BundleContext) {
    hakker.foreach(_ ! PoisonPill)
  }
}