Hi Benoit,
you should take a look
at http://doc.akka.io/docs/akka/snapshot/java/futures.html#Future_is_a_Monad.
Mapper should solve your Problem.
Cheers
André
On Wednesday, November 11, 2015 at 12:01:05 PM UTC+1, Benoit Guillon wrote:
>
> Hi,
>
> I'm using akka http with Java DSL and I'm trying to handle a get request
> with an actor and map my actor's response to the HTTP response as follows:
>
> private Route getTasksRoute(){
> return
> path("tasks").route(pathEndOrSingleSlash().route(get(this.handleWith(
> (ctx) -> ctx.completeWith(handleGetTask(ctx))
> ))));
> }
>
> private Future<RouteResult> handleGetTask(RequestContext ctx){
> return Patterns.ask(actorSystem.actorFor("myActor"), buildMessage(),
> 1000)
> .map(o -> ctx.completeAs(Jackson.json(), o),
> ctx.executionContext());
> }
>
> This code does not compile in Java 8 because the API enforces to use scala
> futures
>
> Error:(74, 17) java: method map in interface scala.concurrent.Future<T>
> cannot be applied to given types;
> required:
> scala.Function1<java.lang.Object,S>,scala.concurrent.ExecutionContext
> found: (o)->ctx.c[...]), o),scala.concurrent.ExecutionContext
> reason: cannot infer type-variable(s) S
> (argument mismatch; scala.Function1 is not a functional interface
> multiple non-overriding abstract methods found in interface
> scala.Function1)
>
> I could not find any relevant code example illustrating this use case in
> java.
>
> Can you suggest a code pattern to illustrate how the completeWith method
> is intended to be used in Java 8 in conjonction with actors' ask pattern ?
>
> Thanks for your help.
>
> Benoit
>
>
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