playframework-2.0 - play 框架 2.1 - 调度异步任务

Question

在 play 的 2.0.x 文档中，您可以看到如何安排异步任务:

http://www.playframework.org/documentation/2.0.4/ScalaAkka

Akka.system.scheduler.schedule(0 seconds, 30 minutes, testActor, "tick")

你怎么能用最近重新发布的 Play 2.1 实现同样的事情？？？

整个 akka API 似乎发生了变化......

我检查过:

https://github.com/playframework/Play20/wiki/Highlights
https://github.com/playframework/Play20/wiki/Migration
并且
http://doc.akka.io/docs/akka/2.1.0-RC1/project/migration-guide-2.0.x-2.1.x.html

也在这里问: https://groups.google.com/d/topic/play-framework/7VcwNea6QlM/discussion

Answer 1

使用 sample code和 Akka API我做了快速测试，对我有用。

比较 2.0.4 和 2.1RC1 之间的代码，我可以看到调度程序只有两个变化:

替代进口

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

添加导入:

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."))
  }

}

编辑

注意，正如我从 Julien 在群组中的帖子中看到的，这足以导入 defaultContext只要:

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