RabbitMQ工作模式之通配符模式详解

<!-- https://mvnrepository.com/artifact/com.rabbitmq/amqp-client -->
<dependency>
    <groupId>com.rabbitmq</groupId>
    <artifactId>amqp-client</artifactId>
    <version>5.21.0</version>
</dependency>

public class Constants {
    public static final String HOST = "47.98.109.138";
    public static final int PORT = 5672;
    public static final String USER_NAME = "study";
    public static final String PASSWORD = "study";
    public static final String VIRTUAL_HOST = "aaa";
    //通配符模式
    public static final String TOPIC_EXCHANGE = "topic.exchange";
    public static final String TOPIC_QUEUE1 = "topic_queue1";
    public static final String TOPIC_QUEUE2 = "topic_queue2";
}

import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import rabbitmq.constant.Constants;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
/**
 * 通配符模式生产者
 */
public class Producer {
    public static void main(String[] args) throws IOException, TimeoutException {
        //1. 建立连接
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost(Constants.HOST);
        connectionFactory.setPort(Constants.PORT); //需要提前开放端口号
        connectionFactory.setUsername(Constants.USER_NAME);//账号
        connectionFactory.setPassword(Constants.PASSWORD);  //密码
        connectionFactory.setVirtualHost(Constants.VIRTUAL_HOST); //虚拟主机
        Connection connection = connectionFactory.newConnection();
        //2. 开启信道
        Channel channel = connection.createChannel();
        //3. 声明交换机
        channel.exchangeDeclare(Constants.TOPIC_EXCHANGE, BuiltinExchangeType.TOPIC, true);
        //4. 声明队列
        channel.queueDeclare(Constants.TOPIC_QUEUE1, true, false, false, null);
        channel.queueDeclare(Constants.TOPIC_QUEUE2, true, false, false, null);
        //5. 绑定交换机和队列
        channel.queueBind(Constants.TOPIC_QUEUE1, Constants.TOPIC_EXCHANGE, "*.a.*");
        channel.queueBind(Constants.TOPIC_QUEUE2, Constants.TOPIC_EXCHANGE, "*.*.b");
        channel.queueBind(Constants.TOPIC_QUEUE2, Constants.TOPIC_EXCHANGE, "c.#");
        //6. 发送消息
        String msg = "hello topic, my routingkey is ae.a.f....";
        channel.basicPublish(Constants.TOPIC_EXCHANGE,"ae.a.f", null, msg.getBytes());  //转发到Q1
        String msg_b = "hello topic, my routingkey is ef.a.b....";
        channel.basicPublish(Constants.TOPIC_EXCHANGE,"ef.a.b", null, msg_b.getBytes()); //转发到Q1和Q2
        String msg_c = "hello topic, my routingkey is c.ef.d....";
        channel.basicPublish(Constants.TOPIC_EXCHANGE,"c.ef.d", null, msg_c.getBytes());//转发Q2
        System.out.println("消息发送成功");
        //7. 释放资源
        channel.close();
        connection.close();
    }
}

import com.rabbitmq.client.*;
import rabbitmq.constant.Constants;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Consumer1 {
    public static void main(String[] args) throws IOException, TimeoutException {
        //1. 建立连接
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost(Constants.HOST);
        connectionFactory.setPort(Constants.PORT); //需要提前开放端口号
        connectionFactory.setUsername(Constants.USER_NAME);//账号
        connectionFactory.setPassword(Constants.PASSWORD);  //密码
        connectionFactory.setVirtualHost(Constants.VIRTUAL_HOST); //虚拟主机
        Connection connection = connectionFactory.newConnection();
        //2. 开启信道
        Channel channel = connection.createChannel();
        //3. 声明队列
        channel.queueDeclare(Constants.TOPIC_QUEUE1,true,false,false,null);
        //4. 消费消息
        DefaultConsumer consumer = new DefaultConsumer(channel){
            //从队列中收到消息, 就会执行的方法
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("接收到消息:"+ new String(body));
            }
        };
        channel.basicConsume(Constants.TOPIC_QUEUE1, true, consumer);
    }
}

import com.rabbitmq.client.*;
import rabbitmq.constant.Constants;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
public class Consumer2 {
    public static void main(String[] args) throws IOException, TimeoutException {
        //1. 建立连接
        ConnectionFactory connectionFactory = new ConnectionFactory();
        connectionFactory.setHost(Constants.HOST);
        connectionFactory.setPort(Constants.PORT); //需要提前开放端口号
        connectionFactory.setUsername(Constants.USER_NAME);//账号
        connectionFactory.setPassword(Constants.PASSWORD);  //密码
        connectionFactory.setVirtualHost(Constants.VIRTUAL_HOST); //虚拟主机
        Connection connection = connectionFactory.newConnection();
        //2. 开启信道
        Channel channel = connection.createChannel();
        //3. 声明队列
        channel.queueDeclare(Constants.TOPIC_QUEUE2,true,false,false,null);
        //4. 消费消息
        DefaultConsumer consumer = new DefaultConsumer(channel){
            //从队列中收到消息, 就会执行的方法
            @Override
            public void handleDelivery(String consumerTag, Envelope envelope, AMQP.BasicProperties properties, byte[] body) throws IOException {
                System.out.println("接收到消息:"+ new String(body));
            }
        };
        channel.basicConsume(Constants.TOPIC_QUEUE2, true, consumer);
    }
}