private void configure() {          //prevent the server and it's version from being transmitted         HttpConfiguration httpConfiguration = new HttpConfiguration();         httpConfiguration.setSendServerVersion(false);         HttpConnectionFactory factory = new HttpConnectionFactory(httpConfiguration);          ServerConnector connector = new ServerConnector(this.server, factory);          connector.setPort(this.port);          ConstraintSecurityHandler constraintSecurityHandler = new ConstraintSecurityHandler();         Constraint constraint = new Constraint();         constraint.setAuthenticate(true);         constraint.setRoles(new String[]{"user"});          constraintSecurityHandler.setAuthenticator(new FormAuthenticator("/login", "/error", false));           ConstraintMapping constraintMapping = new ConstraintMapping();         constraintMapping.setPathSpec("/*");         constraintMapping.setConstraint(constraint);           LoginService loginService = createHashLoginService(“placeholder”);          this.server.addBean(loginService);          this.server.setSessionIdManager(new DefaultSessionIdManager(this.server));          SessionHandler sessionHandler = new SessionHandler();          sessionHandler.setUsingCookies(true);         sessionHandler.setSessionIdPathParameterName("none"); // Prevent JSESSIONID in URL.          constraintSecurityHandler.setLoginService(loginService);         constraintSecurityHandler.addConstraintMapping(constraintMapping);          this.server.addConnector(connector);          ResourceHandler resourceHandler = new ResourceHandler();         resourceHandler.setDirectoriesListed(false);         resourceHandler.setWelcomeFiles(new String[]{"index.html"});         resourceHandler.setResourceBase("web/");          ServletContextHandler servletContextHandler = this.createServletContextHandlerAndRegisterServlets(true);          constraintSecurityHandler.setHandler(resourceHandler);          HandlerList handlers = new HandlerList();          handlers.setHandlers(new Handler[]{                 sessionHandler,                 constraintSecurityHandler,                 servletContextHandler});          this.server.setHandler(handlers);          try { 		  this.server.start();              this.server.dump(System.out);         }         catch (Throwable throwable) {             LOGGER.error("Error starting web server: " + throwable.getMessage(), throwable);         }     }      private static LoginService createHashLoginService(String realm) {         HashLoginService hashLoginService = new HashLoginService();          hashLoginService.setConfig("conf/realm");         hashLoginService.setHotReload(true);         hashLoginService.setName(realm);          return hashLoginService;     }