This works for me, must be your use of thunk-to-function parameters:
scala> object Concurrency {
| import java.util.concurrent.Executors
| import akka.dispatch.ExecutionContexts
| import akka.actor._
| import scala.concurrent._
| import scala.concurrent.duration._
| object Log { def warn(s: String): Unit = System.err.println(s) }
| private val system = ActorSystem("system", defaultExecutionContext
= Some(ExecutionContexts.fromExecutor(Executors.newCachedThreadPool())))
| import system.dispatcher
| private val scheduler = system.scheduler
| Log.warn("starting up actor system")
| Future { Log.warn("runNow works") }
| scheduler.scheduleOnce(3.seconds)(Log.warn("scheduleOnce works"))
| }
defined object Concurrency
scala> Concurrency.toString
starting up actor system
runNow works
res0: String = Concurrency$@417781bc
scala> scheduleOnce works
On Sun, Apr 26, 2015 at 9:50 PM, Ian Nowland <[email protected]> wrote:
> I've been following various example code I've found online, but no matter
> how I rearrange it, I can't seem to get a simple scheduler example to work.
>
>
> This is my current code:
>
>
> object Concurrency extends Loggable {
> private val system = ActorSystem("system", defaultExecutionContext =
> Some(ExecutionContexts.fromExecutor(Executors.newCachedThreadPool())))
> import system.dispatcher
> private val scheduler = system.scheduler
>
> Log.warn("starting up actor system")
>
> def runNow(f: => () => Unit):Unit =
> Future {f()}
>
> def scheduleOnce(duration:FiniteDuration, f: => () => Unit):Unit = {
> scheduler.scheduleOnce(duration)(() => runNow(f))
> }
>
> runNow(() => Log.warn("runNow works"))
> scheduleOnce(FiniteDuration(3,TimeUnit.SECONDS),() =>
> Log.warn("scheduleOnce works"))
> }
>
> When I run this, I see my "runNow works" go off, but not my
> "scheduleOnce". What am I missing?
>
> --
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--
Cheers,
√
--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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