// For starting job in background

long offset = startDate.getTimeInMillis() - currentDate.getTimeInMillis();

ActorRef sceduler = Akka.system().actorOf(Props.create(ThreadJob.class));

Akka.system().scheduler().scheduleOnce(FiniteDuration.create(offset, TimeUnit.MILLISECONDS),sceduler, "ping", Akka.system().dispatcher(), ActorRef.noSender());