The analysis of the message queue implementation of the Rabbitmq framework in the Java library

Rabbitmq is an open source message queue system that is used to realize instant messaging between applications.It is written in Erlang language and provides rich functions and reliability in the Java class library. The principle of Rabbitmq's message queue implementation is very simple. The basic idea is that the producer sends the message to a middleware called Exchange, and then Exchange route to one or more message queues called Queue.Consumers can receive messages from the queue and process them. In Rabbitmq, Exchange and Queue are associated with Bindings.Binding stipulates which Queue of EXCHANGE to send messages to.In fact, Exchange is a very important component, which determines which queue to reach, which is achieved through the type and rules of Exchange. Exchange has four types: Direct, Topic, Headers, and Fanout.Direct -type Exchange sends messages to a specific message queue based on the news of the message.The Topic type Exchange uses the compatriot mode to send the message to the matching queue.Headers type Exchange sends the message to the matching queue based on the Headers property of the message.The FANOUT type Exchange broadcasts the message to all binding queues. In order to use Rabbitmq in the Java library, the first Java client library of Rabbitmq needs to be introduced.Then you can send and receive the message through the following steps: 1. Create an address and port of the RabbitMQ server: ConnectionFactory factory = new ConnectionFactory(); factory.setHost("localhost"); factory.setPort(5672); 2. Use the connection factory to create a connection: Connection connection = factory.newConnection(); 3. Use a connection to create a channel: Channel channel = connection.createChannel(); 4. Determine an Exchange and a Queue: channel.exchangeDeclare("myExchange", "direct"); channel.queueDeclare("myQueue", false, false, false, null); 5. Related Exchange and Queue through binding: channel.queueBind("myQueue", "myExchange", "myRoutingKey"); 6. Send message to Exchange: String message = "Hello RabbitMQ!"; channel.basicPublish("myExchange", "myRoutingKey", null, message.getBytes()); 7. Receive message: Consumer consumer = new DefaultConsumer(channel) { @Override public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException { String message = new String(body, "UTF-8"); System.out.println("Received message: " + message); } }; channel.basicConsume("myQueue", true, consumer); Through the above steps, the message queue can be used to use Rabbitmq in the Java library.Rabbitmq provides rich functions, such as durable message, message confirmation mechanism, message priority, etc., which can be configured and used according to specific needs. In summary, the principle of the message queue implementation of the Rabbitmq framework in the Java class library is to send the message to a specific queue through Exchange, and then consumers receive and process the message from the queue.Through the Java code, you can easily use RabbitMQ to send and receive messages to achieve efficient communication between applications.