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    <p>I am not sure that is what you are looking for, but there is quite a simple solution in the comet-clock sample, that you can adapt to use AKKA actors. It uses an infinite iframe instead of long polling. I have used an adapted version for a more complex application doing multiple DB calls and long computation in AKKA actors and it works fine.</p> <pre><code> def enum = Action { //get your actor val myActorRef = Akka.system.actorOf(Props[TestActor]) //do some query to your DB here. Promise.timeout is to simulate a blocking call def getDatabaseItem(id: Int): Promise[String] = { Promise.timeout("test", 10 milliseconds) } //test iterator, you will want something smarter here val items1 = 1 to 10 toIterator // this is a very simple enumerator that takes ints from an existing iterator (for an http request parameters for instance) and do some computations def myEnum(it: Iterator[Int]): Enumerator[String] = Enumerator.fromCallback[String] { () =&gt; if (!items1.hasNext) Promise.pure[Option[String]](None) //we are done with our computations else { // get the next int, query the database and compose the promise with a further query to the AKKA actor getDatabaseItem(items1.next).flatMap { dbValue =&gt; implicit val timeout = new Timeout(10 milliseconds) val future = (myActorRef ? dbValue) mapTo manifest[String] // here we convert the AKKA actor to the right Promise[Option] output future.map(v =&gt; Some(v)).asPromise } } } // finally we stream the result to the infinite iframe. // console.log is the javascript callback, you will want something more interesting. Ok.stream(myEnum(items1) &amp;&gt; Comet(callback = "console.log")) } </code></pre> <p>Note that this fromCallback doesn't allow you to combine enumerators with "andThen", there is in the trunk version of play2 a generateM method that might be more appropriate if you want to use combinations.</p> <p>It's not long polling, but it works fine.</p>
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