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 ian.nowl...@gmail.com 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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