### Question:
RpcFactory { public static IProviderServer getProviderServer() { String protocol = Property.Rpc.protocol; IProviderServer extension = ExtensionLoader.getExtensionLoader(IProviderServer.class).getExtension(protocol); return extension; }  static IConsumerServer getConsumerService(); static IProviderServer getProviderServer();  }### Answer:
@Test public void provider() throws IOException { IProviderServer providerServer = RpcFactory.getProviderServer(); providerServer.start("127.0.0.1:20880"); System.in.read(); }