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

This example Akka source code file (CallingThreadDispatcherModelSpec.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

actor, akka, callingthreaddispatcherinterceptorconfigurator, callingthreaddispatchermodelspec, dispatch, dispatcher, dispatcherprerequisites, messagedispatcher, messagedispatcherconfigurator, messagedispatcherinterceptor, pinneddispatcher, string, test, testing, testkit, thread

The CallingThreadDispatcherModelSpec.scala Akka example source code

/**
 * Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
 */
package akka.testkit

import java.util.concurrent.atomic.AtomicInteger
import akka.actor.dispatch.ActorModelSpec
import com.typesafe.config.Config
import akka.dispatch.DispatcherPrerequisites
import akka.dispatch.MessageDispatcher
import akka.dispatch.MessageDispatcherConfigurator
import akka.dispatch.UnboundedMailbox

object CallingThreadDispatcherModelSpec {
  import ActorModelSpec._

  val config = {
    """
      boss {
        executor = thread-pool-executor
        type = PinnedDispatcher
      }
    """ +
      // use unique dispatcher id for each test, since MessageDispatcherInterceptor holds state
      (for (n ← 1 to 30) yield """
        test-calling-thread-%s {
          type = "akka.testkit.CallingThreadDispatcherModelSpec$CallingThreadDispatcherInterceptorConfigurator"
        }""".format(n)).mkString
  }

  class CallingThreadDispatcherInterceptorConfigurator(config: Config, prerequisites: DispatcherPrerequisites)
    extends MessageDispatcherConfigurator(config, prerequisites) {

    private val instance: MessageDispatcher =
      new CallingThreadDispatcher(this) with MessageDispatcherInterceptor {
        override def id: String = config.getString("id")
      }

    override def dispatcher(): MessageDispatcher = instance

  }

}

@org.junit.runner.RunWith(classOf[org.scalatest.junit.JUnitRunner])
class CallingThreadDispatcherModelSpec extends ActorModelSpec(CallingThreadDispatcherModelSpec.config) {
  import ActorModelSpec._

  val dispatcherCount = new AtomicInteger()

  override def interceptedDispatcher(): MessageDispatcherInterceptor = {
    // use new id for each test, since the MessageDispatcherInterceptor holds state
    system.dispatchers.lookup("test-calling-thread-" + dispatcherCount.incrementAndGet()).asInstanceOf[MessageDispatcherInterceptor]
  }
  override def dispatcherType = "Calling Thread Dispatcher"

}