code: private void exportAsRMI() throws Exception {
          String appHost = System.getProperty("app.host");
          String appPort = System.getProperty("app.port");
          RmiServiceExporter exporter = new RmiServiceExporter();
          exporter.setServiceInterface(Executable.class);
          String serviceName = getAppName() + "Launcher";
          //exporter.setRegistryHost(appHost);
          exporter.setRegistryPort(Integer.valueOf(appPort));
          exporter.setServiceName(serviceName);
          exporter.setService(this);
          exporter.afterPropertiesSet();
  
          String serviceUrl = String.format("rmi://%s:%s/%s", appHost, appPort, serviceName);
          logger.info(banner("Export Executable Service at {}", serviceUrl));
      }
docs: 将本对象通过Spring的RMI机制暴露出去
  
  @throws Exception