Analysis of the technical principles of Implement the BRPC Java Class Libraares with the Java library to realize the technical principles of the BRPC Java framework.

Analysis of the technical principles of the BRPC Java framework using the Java class library BRPC (BAIDU RPC) is a high -performance, high -reliability remote process call framework for realizing communication between distributed systems.It provides a simple and powerful way, so that developers can easily call methods in a distributed environment.This article will introduce how to use the Java class library to achieve the BRPC Java framework and analyze its technical principles. 1. Use the Java class library to create a service interface First, we need to define the service interface.We can use the annotations in the Java library to mark the interface method to determine the remote call method of the method.For example, we can use @Oneway annotation to indicate that the method is asynchronous and does not need to return values.Use the @Param annotation to specify the parameter name of the method. public interface UserService { @Param(index = 0) void createUser(User user); @OneWay void deleteUser(String userId); User getUser(String userId); } 2. Generate client and server proxy Using dynamic proxy technology in the Java class library can generate clients and server proxy classes.These proxy classes are responsible for forwarding the method call request to the remote server and processing the server's response.For the client agent class, we need to implement the InvoCationhandler interface and rewrite its INVOKE method.In the Invoke method, we can use the network communication library (such as Netty) to send a request and wait for the server's response. public class ClientProxy implements InvocationHandler { private final InetSocketAddress serverAddress; public ClientProxy(InetSocketAddress serverAddress) { this.serverAddress = serverAddress; } public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { // Create a connection, send a request, and receive the server response // ... return response; } } public class ServerProxy implements InvocationHandler { private final Object serviceImpl; public ServerProxy(Object serviceImpl) { this.serviceImpl = serviceImpl; } public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { // Class the implementation method of the service interface and return the result // ... return result; } } 3. Configure and start server Through the network communication library provided by the Java class library, we can easily create a monitor on the server and wait for the client connection.After receiving the client's request, the server agency class will forward the request to the implementation class of the service interface and send the return result to the client. public class Server { private final InetSocketAddress listenAddress; private final Object serviceImpl; public Server(InetSocketAddress listenAddress, Object serviceImpl) { this.listenAddress = listenAddress; this.serviceImpl = serviceImpl; } public void start() { // Create a listener and wait for the client connection // Handle the client's request and send a response // ... } } 4. Create clients and servers and communicate Using the above proxy class, we can create clients and servers and call remote methods.The client first needs to create an instance of a client agent class and pass the server address.Then, remote calls by calling the proxy class.The server needs to create an instance of a server proxy and pass the implementation class of the service interface as a parameter.Finally, the server calls the start method to start the server monitor. public class Main { public static void main(String[] args) { // Create a server UserServiceImpl serviceImpl = new UserServiceImpl(); ServerProxy serverProxy = new ServerProxy(serviceImpl); Server server = new Server(new InetSocketAddress("localhost", 9000), serverProxy); // Create a client ClientProxy clientProxy = new ClientProxy(new InetSocketAddress("localhost", 9000)); UserService userService = (UserService) Proxy.newProxyInstance( UserService.class.getClassLoader(), new Class<?>[] { UserService.class }, clientProxy); // Client call remote method userService.createUser(new User("001", "Alice")); userService.deleteUser("001"); User user = userService.getUser("001"); } } In summary, by using the Java library, we can realize the technical principles of the BRPC Java framework.With the dynamic proxy and network communication library in the Java library, we can easily create the client and server agent class and make remote methods call.In this way, developers can more conveniently build a distributed system and enjoy the high performance and high reliability brought by the BRPC framework.