Main program, setting up Spray and Akka

Main1.java

public static final ActorSystem system = ActorSystem.create("system");

public static void main(String[] args) {
    ...
    ActorRef listener = system.actorOf(Props.create(HttpActor.class), "httpActor"); 
    
    InetSocketAddress endpoint = new InetSocketAddress(3000);
    int backlog = 100;
    List<Inet.SocketOption> options = JavaConversions.asScalaBuffer(new ArrayList<Inet.SocketOption>()).toList();
    Option<ServerSettings> settings = scala.Option.empty();
    ServerSSLEngineProvider sslEngineProvider = null;
    Bind bind = new Http.Bind(listener, endpoint, backlog, options, settings, sslEngineProvider);
    IO.apply(spray.can.Http$.MODULE$, system).tell(bind, ActorRef.noSender());
    
    system.scheduler().schedule(new FiniteDuration(5, TimeUnit.SECONDS), new FiniteDuration(5, TimeUnit.SECONDS), ()->{
        System.out.println(new Date() + " - numSales=" + numSales.get());
    }, system.dispatcher());
}