public SparknginServer() throws Exception {
   FileUtil.removeIfExist("build/queue", false);
   forwarder = new NullDevMessageForwarder();
   server = new HttpServer();
   server.setPort(7080);
   metricRegistry = new MetricRegistry();
   server.add(
       "/message/json",
       new JSONMessageRouteHandler(new Sparkngin(metricRegistry, forwarder, "build/queue/data")));
   server.setDefault(new StaticFileHandler("."));
   server.startAsDeamon();
   Thread.sleep(2000);
 }
 public HttpServerSimulator start() {
   server.startAsDeamon();
   return this;
 }