public class TicketMachine
extends Object
Created by ruedi on 02.06.14.
Single threaded, can be used from within one actor only !
Problem:
you receive a stream of events related to some items (e.g. UserSessions or Trades)
you need to do some asynchronous lookups during processing (e.g. query data async)
now you want to process parallel, but need to process events related to a single item
in order (e.g. want to process trades related to say BMW in the order they come in).
usage:
ticketMachine.getTicket( "BMW" ).then(
(endSignalfuture,e) -> {
.. wild async processing ..
endsignalFuture.receiveResult("done",null);
});