Akka Actors to be executed in Swing / JavaFX thread - based on Victor Klang's [Swing Actors](https://gist.github.com/viktorklang/2422443)

src.akka.dispatch.gui.GuiDispatcher.scala

package akka.dispatch.gui

// original work copyright 2012 Viktor Klang

/**
 * (A). define the gui dispatchers programmaticaly
 */

import akka.dispatch.{DispatcherPrerequisites, ExecutorServiceFactory, ExecutorServiceConfigurator}
import com.typesafe.config.Config
import java.util.concurrent.{ExecutorService, AbstractExecutorService, ThreadFactory, TimeUnit}
import java.util.Collections
import javax.swing.SwingUtilities
import javafx.application.Platform


// First we wrap invokeLater/runLater as an ExecutorService
abstract class GUIExecutorService extends AbstractExecutorService {
  def execute(command: Runnable): Unit

  def shutdown(): Unit = ()

  def shutdownNow() = Collections.emptyList[Runnable]

  def isShutdown = false

  def isTerminated = false

  def awaitTermination(l: Long, timeUnit: TimeUnit) = true
}

object JavaFXExecutorService extends GUIExecutorService {
  override def execute(command: Runnable) = Platform.runLater(command)
}

object SwingExecutorService extends GUIExecutorService {
  override def execute(command: Runnable) = SwingUtilities.invokeLater(command)
}


// Then we create an ExecutorServiceConfigurator so that Akka can use our JavaFXExecutorService for the dispatchers
class JavaFXEventThreadExecutorServiceConfigurator(config: Config, prerequisites: DispatcherPrerequisites) extends ExecutorServiceConfigurator(config, prerequisites) {
  private val f = new ExecutorServiceFactory {
    def createExecutorService: ExecutorService = JavaFXExecutorService
  }

  def createExecutorServiceFactory(id: String, threadFactory: ThreadFactory): ExecutorServiceFactory = f
}

// Then we create an ExecutorServiceConfigurator so that Akka can use our SwingExecutorService for the dispatchers
class SwingEventThreadExecutorServiceConfigurator(config: Config, prerequisites: DispatcherPrerequisites) extends ExecutorServiceConfigurator(config, prerequisites) {
  private val f = new ExecutorServiceFactory {
    def createExecutorService: ExecutorService = SwingExecutorService
  }

  def createExecutorServiceFactory(id: String, threadFactory: ThreadFactory): ExecutorServiceFactory = f
}

src.application.conf

/**
 * (B). Then we simply need to create a dispatcher configuration in our application.conf
 */
 
javafx-dispatcher {
  type = "Dispatcher"
  executor = "akka.dispatch.gui.JavaFXEventThreadExecutorServiceConfigurator"
  throughput = 1
}

swing-dispatcher {
  type = "Dispatcher"
  executor = "akka.dispatch.gui.SwingEventThreadExecutorServiceConfigurator"
  throughput = 1
}

src.YOUR_CODE.scala

// After that we just create the GUI Actors with a Props with the correct dispatcher set:
val javaFxActor = context.actorOf(Props[JavaFxActor].withDispatcher("javafx-dispatcher"), "javaFxActor")
val swingActor = context.actorOf(Props[SwingActor].withDispatcher("swing-dispatcher"), "swingActor")

// Done! Now all messages processed by the new actor will be executed by the Swing/JavaFX Event Dispatch Thread, enjoy!

For archeologists :))))))))