Hi Rob,
after the map you will have failed Future if you throw an exception inside
a map. So your example seems correct. Check out this full compiling and
running sample code:
import scala.concurrent.Future
import scala.concurrent.ExecutionContext.Implicits.global
def mapIt(f: Future[Option[Int]]) = f.map {
case Some(i) => i
case None => throw new Exception("None found")
}
val f = mapIt(Future { Some(123) })
val g = mapIt(Future { None })
Thread.sleep(100)
println(f.value)
println(g.value)
Which would print:
Some(Success(123))
Some(Failure(java.lang.Exception: None found))
On Tue, Jul 29, 2014 at 3:35 PM, Rob Jones <[email protected]> wrote:
> The following code is part of a Play asynchronous action
>
> The actor actorRef replies to GETVALUE with Option[Int]
>
> I would like a response of None to give a failed future f but instead the
> exception is thrown
>
> val f = (actorRef ? GETVALUE) map {
> case Some(i; Int) =>
> case None => throw new Exception("value not found")
> }
>
> Is this to do with the threading in the particular usage?
>
> Many thanks.
>
> --
> >>>>>>>>>> Read the docs: http://akka.io/docs/
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--
Martynas Mickevičius
Typesafe <http://typesafe.com/> – Reactive
<http://www.reactivemanifesto.org/> Apps on the JVM
--
>>>>>>>>>> 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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