play framework 2.1 - scheduling async tasks

akka, playframework-2.0, playframework-2.1, scheduled-tasks

Solution

Using sample code and Akka API I made fast test, works for me.

Comparing code between 2.0.4 and 2.1RC1 I can see there're only two changes in case of scheduler:

replaced import

// import akka.util.duration._
import scala.concurrent.duration._

added import:

import play.api.libs.concurrent.Execution.Implicits._

`app/controllers/Application.scala`

package controllers

import play.api._
import play.api.mvc._
import play.libs.Akka

import akka.actor._
import scala.concurrent.duration._
import play.api.libs.concurrent.Execution.Implicits._

object Application extends Controller {

  def index = Action {

    // say hello
    Logger.info("hello, index action started")

    val Tick = "tick"
    val Tack = "tack"

    val tickActor = Akka.system.actorOf(Props(new Actor {
      def receive = {
        case Tick => Logger.info("that still ticks!")
        case Tack => Logger.warn("... 7 seconds after start, only once")
      }
    }))

    // Repeat every 5 seconds, start 5 seconds after start
    Akka.system.scheduler.schedule(
      5 seconds,
      5 seconds,
      tickActor,
      Tick
    )

    // do only once, 7 seconds after start
    Akka.system.scheduler.scheduleOnce(7 seconds, tickActor, Tack)

    Ok(views.html.index("Your new application is ready."))
  }

}

Edit

Nota bene, as I can see from Julien's post on the group, that's enough to import `defaultContext` only:

import play.api.libs.concurrent.Execution.Implicits.defaultContext

Problem

In play's 2.0.x doc you can see how to schedule asynchronous tasks: http://www.playframework.org/documentation/2.0.4/ScalaAkka ``` Akka.system.scheduler.schedule(0 seconds, 30 minutes, testActor, "tick") ``` How can you achieve the same thing withthe recently releades Play 2.1??? The whole akka API seems to have changed... I've checked: https://github.com/playframework/Play20/wiki/Highlights https://github.com/playframework/Play20/wiki/Migration and also http://doc.akka.io/docs/akka/2.1.0-RC1/project/migration-guide-2.0.x-2.1.x.html also asked here: https://groups.google.com/d/topic/play-framework/7VcwNea6QlM/discussion

Original source