Java -class library technology original understanding of Jeromq framework

Jeromq is a ZEROMQ -based Java library. It provides an efficient and reliable message transmission mechanism by implementing ZEROMQ's socket style and communication mode.It was built above the Java native socket, and aims to simplify the process of simplifying Java developers to create distributed applications. Jeromq's technical principles mainly include the following aspects: 1. Synchronous/asynchronous communication mode: Jeromq supports two communication modes: synchronization and asynchronous communication mode.In the synchronization mode, the sender and the receiver will block until the sending and receiving operation of the message is completed.In the asynchronous mode, the sender and the receiver can continue to perform other tasks without waiting for the return of the message. Below is an example code using synchronous communication mode: // Create a REQ put word connection to the specified address and port ZMQ.Socket socket = ZMQ.context(1).socket(ZMQ.REQ); socket.connect("tcp://localhost:5555"); // Send a message String message = "Hello, World!"; socket.send(message.getBytes(), 0); // Receive the reply message byte[] reply = socket.recv(0); System.out.println("Received reply: " + new String(reply)); // Turn off the slit word socket.close(); 2. Multi -road reuse mechanism: Jeromq uses Java's selector to implement the multi -way replication of the jacket.By registering multiple sets to the selector and using non -blocking methods for rotation, multiple connections can be processed at the same time in a single thread. Here are a sample code that uses multiple reuse mechanisms: // Create a context object and selector ZMQ.Context context = ZMQ.context(1); Selector selector = Selector.open(); // Create a jacket and register on the selector ZMQ.Socket socket1 = context.socket(ZMQ.SUB); socket1.connect("tcp://localhost:5555"); SelectionKey key1 = socket1.register(selector, SelectionKey.OP_READ); ZMQ.Socket socket2 = context.socket(ZMQ.PUB); socket2.connect("tcp://localhost:5556"); SelectionKey key2 = socket2.register(selector, SelectionKey.OP_WRITE); // Circtering incidents while (true) { // Obstruct ever selector.select(); // Prepatable incident Set<SelectionKey> selectedKeys = selector.selectedKeys(); for (SelectionKey key : selectedKeys) { if (key.isReadable()) { // Treatment of readable events ZMQ.Socket socket = (ZMQ.Socket) key.channel(); byte[] message = socket.recv(0); System.out.println("Received message: " + new String(message)); } else if (key.isWritable()) { // Treatment can write events ZMQ.Socket socket = (ZMQ.Socket) key.channel(); String message = "Hello, World!"; socket.send(message.getBytes(), 0); } } } 3. Thread security: Jeromq guarantees the thread security of its jacket instance.It uses the built -in thread synchronization mechanism of Java, such as the synchronized keyword to ensure the correct concurrency access access.This allows developers to share and use cases between multiple threads without worrying about data competition or other concurrent problems. In summary, Jeromq is a powerful Java class library. It uses ZEROMQ's socket style and communication mode to provide a efficient and reliable message transmission mechanism for Java developers.Through synchronous/asynchronous communication mode, multi -way reuse mechanism and thread security support, Jeromq can easily create complex distributed applications.