How to implement the remote call of the Java class library in the ActiveJ: RPC framework

ActiveJ is a high -performance asynchronous framework based on Java, which provides a simple and powerful way to achieve remote process calls (RPC).In ActiveJ, we can use the ACTIVEJ RPC module to implement the remote calls of the Java library. This article will introduce you how to implement the remote call of the Java library in ActiveJ and provide related Java code examples. ## Step 1: Definition interface First of all, you need to define a remote call interface, which specifies the method of signing the method to call on the remote server.The following is a sample interface definition: public interface CalculatorService { int add(int a, int b); int subtract(int a, int b); int multiply(int a, int b); int divide(int a, int b); } ## Step 2: Implement service Next, you need to implement the server of the remote call interface.To this end, you need to create a class that implements the interface and use the `@@@RPCENDPOINT` annotation marked as the remote server point on this class. @RpcEndpoint(transports = RpcTransports.JAVA_NIO) public class CalculatorServiceImpl implements CalculatorService { public int add(int a, int b) { return a + b; } public int subtract(int a, int b) { return a - b; } public int multiply(int a, int b) { return a * b; } public int divide(int a, int b) { return a / b; } } In the above examples, `@在`@在 (Transports = RPCTRANSPORTS.JAVA_NIO) `` `Java NiO transmission layers are specified for remote calls. ## Step 3: Start the server After completing the implementation of the server, you need to start the ActiveJ server so that the client can call the service remotely.The following is a simple server startup example: public class ServerExample { public static void main(String[] args) throws Exception { Eventloop eventloop = Eventloop.create().withCurrentThread(); RpcServer rpcServer = RpcServers.create(eventloop) .withHandler(CalculatorService.class, new CalculatorServiceImpl()) .withListenAddress(InetAddress.getLocalHost(), 8080) .build(); rpcServer.listen(); System.out.println("Server started on port 8080..."); } } In the above examples, we use the `RPCSERVERS.CREATE (EventLoop)` to create a RPC server and use the `Withhandler (Calculatorservice.class, New Calculatorserviceimpl ())`) `) specifies the interfaces to be processed, and specific real real real realities. Existing. ## Step 4: Implement the client Next, you need to implement a client to call remote services.First of all, you need to use the `RPCClient` to create a client instance and specify the server address to be called remotely. public class ClientExample { public static void main(String[] args) throws Exception { Eventloop eventloop = Eventloop.create().withCurrentThread(); SerializerFactory serializerFactory = SerializerFactory.defaultFactory(); RpcClient rpcClient = RpcClient.create(eventloop) .withMessageTypes(CalculatorService.class) .withAddress(InetAddress.getLocalHost(), 8080) .withSerializerFactory(serializerFactory) .build(); CalculatorService calculatorService = rpcClient.createStub(CalculatorService.class); // Use remote call service int result = calculatorService.add(10, 5); System.out.println("Result: " + result); } } In the above examples, we use the `rpcclient.create (eventloop)` to create an RPC client and use the `WithMmessageTypes (Calculatorservice.class)` specify the interface to be called.Then, the server address to be connected was specified using the server address to be connected with `Withaddress.getLocalHost (), 8080). Finally, we created a remote service for remote call by calling the `rpcclient.createStub (Calculatorservice.class)` to achieve remote calls. ## Step 5: Run Example Now you can run the server and client examples and observe the output results. When you run the server example, you will see that the server has started and monitored port 8080. When you run the client example, you will see the client call the remote service and print the results. So far, you have successfully implemented the remote call of the Java library in ActiveJ.You can expand and optimize the functions and performance of remote services as needed. Hope this article will help you!