ActiveJ: RPC framework architecture analysis in the Java class library
ActiveJ is a high -performance RPC framework based on Java. It provides a simple and scalable method to build a distributed system.This article will analyze the ActiveJ architecture and provide some Java code examples.
ActiveJ's architecture consists of the following core components:
1. EventLoop: The event cycle is one of the core components of ActiveJ, which is responsible for handling and distributing events.Each incident cycle runs in one thread, which can handle multiple concurrent events to improve the performance of the system.The following is an example code of a simple event cycle:
Eventloop eventloop = Eventloop.create().withCurrentThread().withInspector(new Slf4Slf4jInspector());
eventloop.run();
2. Communication protocol: ActiveJ supports various communication protocols, such as TCP, UDP, and HTTP.You can choose a suitable agreement according to your needs.The following is an example code using the TCP protocol:
NioServer nioServer = NioServer.create()
.withAcceptOnce()
.withListenPort(8080)
.withBufferPool(1024, 64 * 1024)
.withMessageSerializer(ofUtf8Strings())
.withSocketSettings(socketSettings -> socketSettings.withTcpNoDelay(true))
.withLogger(logger);
eventloop.acceptSockets(nioServer, socket -> {
logger.info("New connection: {}", socket);
socket.read(new TcpSocketReader<>() {
@Override
protected void onRead(SocketChannel input, ByteBuffer buffer) {
byte[] data = new byte[buffer.remaining()];
buffer.get(data);
String message = new String(data, StandardCharsets.UTF_8);
logger.info("Received message: {}", message);
// Process the receiving message
buffer.clear();
String response = "Hello, client!";
buffer.put(response.getBytes(StandardCharsets.UTF_8));
buffer.flip();
socket.writeAsync(buffer);
}
@Override
protected void onClosed(SocketChannel socketChannel) {
logger.info("Connection closed: {}", socketChannel);
}
});
});
eventloop.run();
3. Remote service call: ActiveJ provides a statement method to define remote service interfaces, and realize remote methods through dynamic agency mechanisms.Here are a sample code that uses ActiveJ for remote calls:
Eventloop eventloop = Eventloop.create().withCurrentThread();
AsyncHttpClient client = HttpClient.create(eventloop)
.withKeepAlive(true)
.withRequestTimeout(Duration.ofSeconds(5))
.withEndpoint("http://localhost:8080");
MyService myService = ActiveFsStubFactory.load(MyService.class, client);
// Call the remote method
String result = myService.processData("data");
System.out.println(result);
In this example, `MyService` is a remote service interface.
The architecture of ActiveJ makes the constructive distributed system simple and flexible.It provides high -performance, scalable RPC frameworks, allowing developers to better build distributed applications.
To sum up, this article analyzes the architecture of ActiveJ and provides some Java code examples.I hope these content can help you better understand and use ActiveJ.
