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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