The practical application of JAKARTA Messaging API framework in the Java class library

Jakarta Messaging API (formerly known as Java Message Service) is a standard for building an asynchronous and reliable message transmission application.It uses a loose coupling method to decide the message sender and receiver, thereby providing a reliable message transmission mechanism.This article will introduce the practical application of Jakarta Messaging API framework technical principles and provide some Java code examples. 1 Introduction In modern software systems, asynchronous message transmission has become a common architecture mode.It allows different components to realize loose communication by sending and receiving messages.Jakarta Messaging API (hereinafter referred to as JMS) provides a standardized way to realize asynchronous messages, whether in the Javaee application or independent Java applications. 2. JMS working principle JMS uses the producer-consumer model and realizes message transmission through Message Broker.Producers are responsible for creating messages and sending them to the message queue or topic, while consumers receive and process messages from queues or themes. 2.1 queue mode In the queue mode, the message sent by the producer can only be accepted and processed by one consumer.This model is suitable for point -to -point communication scenarios, and each message has only one receiver. Below is a Java code example using the JMS queue mode: // Create a connection factory ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616"); // Create a connection Connection connection = connectionFactory.createConnection(); // Start the connection connection.start(); // Create the meeting Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // Create queue Queue queue = session.createQueue("myQueue"); // Create message producers MessageProducer producer = session.createProducer(queue); // Create messages TextMessage message = session.createTextMessage("Hello, JMS!"); // Send a message producer.send(message); // Turn off the connection connection.close(); 2.2 Theme mode In the theme mode, the message sent by the producer can be received and processed by multiple consumers at the same time.This model is suitable for publishing-subscription communication scenarios, each of which has multiple receivers. The following is a Java code example using the JMS theme mode: // Create a connection factory ConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616"); // Create a connection Connection connection = connectionFactory.createConnection(); // Start the connection connection.start(); // Create the meeting Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); // Create the topic Topic topic = session.createTopic("myTopic"); // Create message producers MessageProducer producer = session.createProducer(topic); // Create messages TextMessage message = session.createTextMessage("Hello, JMS!"); // Send a message producer.send(message); // Turn off the connection connection.close(); 3. JMS application scenarios JMS has a wide range of applications in various scenarios, including: 3.1 asynchronous notice JMS can be used to implement asynchronous notification mechanisms so that different components of the system can work at different times and speeds. 3.2 Affairs message JMS supports transaction news, which means that a set of related news is either accepted and processed, or all of them are rejected and rolled back. 3.3 Message filtering JMS allows consumers to select messages based on specific standards.This flexibility allows the system to receive and process messages on demand. 4. Summary This article introduces the practical application of the technical principles of Jakarta Messaging API framework, and provides examples of JAVA code using the JMS queue mode and theme mode.JMS, as a general message transmission standard, can be used in various scenarios to provide reliable asynchronous communication mechanisms.Whether in Javaee applications or independent Java applications, JMS is a reliable and flexible message transmission solution. (Note: The above example uses Apache ActiveMQ as a message agent. You can also choose other JMS providers, such as Rabbitmq, ActiveMQ Artemis, etc.).).).).