http://letitcrash.com/post/17888436664/a-sample-application-showcasing-play-mini-and-akka Java example

gistfile1.java

Timeout timeout = new Timeout(Duration.parse("20 seconds"));
Future<Object> future = Patterns.ask(myActor, new ClientMessage(null), timeout);

Promise<Object> sdf = Akka.asPromise(future);
Promise<Result> r2 = sdf.map(new Function<Object, Result>() {

	@Override
	public Result apply(Object a) throws Throwable {
		val wsrm = (MyMessage)a;
		return ok((wsrm).val); // String value from message object
	}
	
});
Result test2 = async(r2);
return test2;