Question

I’m trying to call a actor to do something time consuming.
The caller set a timer with 5 sec. But I can’t handle the timeout exception with try/catch.

return async(Akka.asPromise(ask(myActor, "hello", uploadImageTimeout)).map(new Function<Object, Result>() {
@Override
public Result apply(Object response) {
return ok("Done");
}
}));

Answer 1

One thing you can do is to “recover” from the exception right inside the Akka future:

return async(Akka.asPromise(ask(myActor, "hello", uploadImageTimeout).recover(
    new Recover<Object>() {
        @Override
        public Object recover(Throwable t) throws Throwable {
            if( t instanceof AskTimeoutException ) {
                Logger.error("Got exception: ", t);
                return internalServerError("Timeout");
            }
            else {
                Logger.error("Got exception: ", t);
                return internalServerError("Got Exception: " + t.getMessage());
            }
        }
    })
).map(new Function<Object, Result>() {
    @Override
    public Result apply(Object response) {
        if( response instanceof Result ) {
            // Result objects are returned by the recover handler above
            return (Result)response;
        }
        else {
            return ok(doSomethingWithResponse(response));
        }
    }
}));