Play Framework/Scala example source code file (Invoker.scala)

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

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

Play Framework tags/keywords

actor, actorsystem, akka, api, closablelazy, closefunction, concurrent, config, core, executioncontext, invoker, no, play, play framework

The Invoker.scala Play Framework example source code

/*
 * Copyright (C) 2009-2013 Typesafe Inc. <http://www.typesafe.com>
 */
package play.core

import akka.actor._
import com.typesafe.config._
import play.api.{ Logger, Play }
import scala.concurrent.ExecutionContext

/**
 * provides Play's internal actor system and the corresponding actor instances
 */
private[play] object Invoker {

  val lazySystem = new ClosableLazy[ActorSystem] {

    protected def create() = {
      val system = Play.maybeApplication.map { app =>
        ActorSystem("play", loadActorConfig(app.configuration.underlying), app.classloader)
      } getOrElse {
        Play.logger.warn("No application found at invoker init")
        ActorSystem("play", loadActorConfig(ConfigFactory.load()))
      }

      val close: CloseFunction = { () =>
        system.shutdown()
        system.awaitTermination()
      }

      (system, close)
    }

    private def loadActorConfig(config: Config) = {
      config.getConfig("play")
    }

  }

  def system: ActorSystem = lazySystem.get()
  def executionContext: ExecutionContext = system.dispatcher

}