while (true) {
            try {

                ReferenceConfig<INoProvider> reference = new ReferenceConfig<>(); // #1
                reference.setApplication(new ApplicationConfig("first-dubbo-client")); // #2
                reference.setRegistry(new RegistryConfig("zookeeper://127.0.0.1:2181")); // #3
                reference.setInterface(INoProvider.class); // #4
                INoProvider noProvider = reference.get(); // #5
                noProvider.say(); // #6

                Thread.sleep(10);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

public void register(URL url) {
        if (url == null) {
            throw new IllegalArgumentException("register url == null");
        }
        if (logger.isInfoEnabled()){
            logger.info("Register: " + url);
        }
        registered.add(url);
    }