RabbitMQ之Topics通配符模式

深碍√TFBOYSˉ_ 2022-01-28 14:19 307阅读 0赞

# [RabbitMQ之Topics通配符模式][RabbitMQ_Topics] #

说明：此模式实在路由key模式的基础上，使用了通配符来管理消费者接收消息。生产者P发送消息到交换机X，type=topic，交换机根据绑定队列的routing key的值进行通配符匹配；

符号\#：匹配一个或者多个词lazy.\# 可以匹配lazy.irs或者lazy.irs.cor  
符号\*：只能匹配一个词lazy.\* 可以匹配lazy.irs或者lazy.cor

注意交换机的类型：direct  fanout  topic  headers

![1179709-20181111225201052-1079657782.png][]

# “ \* ”的使用 #

生产者：

package com.toov5.topic;
    
    import java.io.IOException;
    import java.util.concurrent.TimeoutException;
    
    import com.rabbitmq.client.Channel;
    import com.rabbitmq.client.Connection;
    import com.toov5.utils.MQConnectionUtils;
    
    //生产者 交换机类型 producerFanout类型
    public class TopicProducer {
        //交换机名称
         private static final String EXCHANGE_NAME = "my_topic"; 
         public static void main(String[] args) throws IOException, TimeoutException {
            //建立MQ连接
             Connection connection = MQConnectionUtils.newConnection();
            //创建通道
              Channel channel = connection.createChannel();
              //生产者绑定交换机
              channel.exchangeDeclare(EXCHANGE_NAME, "topic");  //交换机名称  交换机类型
              String routingKey="log.email";    //消息只会给邮件类型的
              //创建对应的消息 
              String msString = "my_Routing_destination_msg"+routingKey;
              //通过频道 发送消息
              System.out.println("生产者投递消息："+msString);
              channel.basicPublish(EXCHANGE_NAME, routingKey, null, msString.getBytes());
              //关闭通道 和 连接
              channel.close();
              connection.close();
        }
        
    }

消费者：

package com.toov5.topic;
    
    import java.io.IOException;
    import java.util.concurrent.TimeoutException;
    
    import com.rabbitmq.client.Channel;
    import com.rabbitmq.client.Connection;
    import com.rabbitmq.client.DefaultConsumer;
    import com.rabbitmq.client.Envelope;
    import com.rabbitmq.client.AMQP.BasicProperties;
    import com.toov5.utils.MQConnectionUtils;
    
    //邮件消费者
    public class ConsumerSMSTopic {
        private static final String SMS_QUEUE ="sms_queue_topic";
        //交换机名称
       private static final String EXCHANGE_NAME = "my_topic"; 
         public static void main(String[] args) throws IOException, TimeoutException {
             System.out.println("短信消费者启动");
            //建立MQ连接
             Connection connection = MQConnectionUtils.newConnection(); 
            //创建通道
              Channel channel = connection.createChannel();
              
            //消费者声明队列
              channel.queueDeclare(SMS_QUEUE, false, false, false, null);
             //消费者队列绑定 路由
             channel.queueBind(SMS_QUEUE, EXCHANGE_NAME, "log.*");
              //消费者监听消息
          DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
                  //重写监听方法
                 @Override
                 public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                         throws IOException {             
                     String msg = new String(body,"UTF-8");
                     System.out.println("短信消费者获取生产者消息"+msg);
                 }
             };
             channel.basicConsume(SMS_QUEUE,true, defaultConsumer);   //绑定队列 事件监听
                
        }
    }

package com.toov5.topic;
    
    import java.io.IOException;
    import java.util.concurrent.TimeoutException;
    
    import com.rabbitmq.client.Channel;
    import com.rabbitmq.client.Connection;
    import com.rabbitmq.client.DefaultConsumer;
    import com.rabbitmq.client.Envelope;
    import com.rabbitmq.client.AMQP.BasicProperties;
    import com.toov5.utils.MQConnectionUtils;
    
    //邮件消费者
    public class ConsumerEmailTopic {
        private static final String EMAIL_QUEUE ="email_queue_topic";
        //交换机名称
       private static final String EXCHANGE_NAME = "my_topic"; 
         public static void main(String[] args) throws IOException, TimeoutException {
             System.out.println("邮件消费者启动");
            //建立MQ连接
             Connection connection = MQConnectionUtils.newConnection(); 
            //创建通道
              Channel channel = connection.createChannel();
              
            //消费者声明队列
              channel.queueDeclare(EMAIL_QUEUE, false, false, false, null);
             //消费者队列绑定 路由
              channel.queueBind(EMAIL_QUEUE, EXCHANGE_NAME, "log.email");
              //消费者监听消息
          DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
                  //重写监听方法
                 @Override
                 public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                         throws IOException {             
                     String msg = new String(body,"UTF-8");
                     System.out.println("邮件消费者获取生产者消息"+msg);
                 }
             };
             channel.basicConsume(EMAIL_QUEUE,true, defaultConsumer);   //绑定队列 事件监听
                
        }
    }

可以看到两个消费者都可以接收到

![1179709-20181111232940390-136938977.png][]

![1179709-20181111232959206-1126512074.png][]

#  换成 “\#” #

生产者：

package com.toov5.topic;
    
    import java.io.IOException;
    import java.util.concurrent.TimeoutException;
    
    import com.rabbitmq.client.Channel;
    import com.rabbitmq.client.Connection;
    import com.toov5.utils.MQConnectionUtils;
    
    //生产者 交换机类型 producerFanout类型
    public class TopicProducer {
        //交换机名称
         private static final String EXCHANGE_NAME = "my_topic"; 
         public static void main(String[] args) throws IOException, TimeoutException {
            //建立MQ连接
             Connection connection = MQConnectionUtils.newConnection();
            //创建通道
              Channel channel = connection.createChannel();
              //生产者绑定交换机
              channel.exchangeDeclare(EXCHANGE_NAME, "topic");  //交换机名称  交换机类型
              String routingKey="log.email.sms";    //消息只会给邮件类型的
              //创建对应的消息 
              String msString = "my_Routing_destination_msg"+routingKey;
              //通过频道 发送消息
              System.out.println("生产者投递消息："+msString);
              channel.basicPublish(EXCHANGE_NAME, routingKey, null, msString.getBytes());
              //关闭通道 和 连接
              channel.close();
              connection.close();
        }
        
    }

消费者：

package com.toov5.topic;
    
    import java.io.IOException;
    import java.util.concurrent.TimeoutException;
    
    import com.rabbitmq.client.Channel;
    import com.rabbitmq.client.Connection;
    import com.rabbitmq.client.DefaultConsumer;
    import com.rabbitmq.client.Envelope;
    import com.rabbitmq.client.AMQP.BasicProperties;
    import com.toov5.utils.MQConnectionUtils;
    
    //邮件消费者
    public class ConsumerSMSTopic {
        private static final String SMS_QUEUE ="sms_queue_topic";
        //交换机名称
       private static final String EXCHANGE_NAME = "my_topic"; 
         public static void main(String[] args) throws IOException, TimeoutException {
             System.out.println("短信消费者启动");
            //建立MQ连接
             Connection connection = MQConnectionUtils.newConnection(); 
            //创建通道
              Channel channel = connection.createChannel();
              
            //消费者声明队列
              channel.queueDeclare(SMS_QUEUE, false, false, false, null);
             //消费者队列绑定 路由
             channel.queueBind(SMS_QUEUE, EXCHANGE_NAME, "log.#");
              //消费者监听消息
          DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
                  //重写监听方法
                 @Override
                 public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                         throws IOException {             
                     String msg = new String(body,"UTF-8");
                     System.out.println("短信消费者获取生产者消息"+msg);
                 }
             };
             channel.basicConsume(SMS_QUEUE,true, defaultConsumer);   //绑定队列 事件监听
                
        }
    }

package com.toov5.topic;
    
    import java.io.IOException;
    import java.util.concurrent.TimeoutException;
    
    import com.rabbitmq.client.Channel;
    import com.rabbitmq.client.Connection;
    import com.rabbitmq.client.DefaultConsumer;
    import com.rabbitmq.client.Envelope;
    import com.rabbitmq.client.AMQP.BasicProperties;
    import com.toov5.utils.MQConnectionUtils;
    
    //邮件消费者
    public class ConsumerEmailTopic {
        private static final String EMAIL_QUEUE ="email_queue_topic";
        //交换机名称
       private static final String EXCHANGE_NAME = "my_topic"; 
         public static void main(String[] args) throws IOException, TimeoutException {
             System.out.println("邮件消费者启动");
            //建立MQ连接
             Connection connection = MQConnectionUtils.newConnection(); 
            //创建通道
              Channel channel = connection.createChannel();
              
            //消费者声明队列
              channel.queueDeclare(EMAIL_QUEUE, false, false, false, null);
             //消费者队列绑定 路由
              channel.queueBind(EMAIL_QUEUE, EXCHANGE_NAME, "log.email");
              //消费者监听消息
          DefaultConsumer defaultConsumer = new DefaultConsumer(channel) {
                  //重写监听方法
                 @Override
                 public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
                         throws IOException {             
                     String msg = new String(body,"UTF-8");
                     System.out.println("邮件消费者获取生产者消息"+msg);
                 }
             };
             channel.basicConsume(EMAIL_QUEUE,true, defaultConsumer);   //绑定队列 事件监听
                
        }
    }

![1179709-20181111234257970-1553251108.png][]

![1179709-20181111234314395-851494630.png][]

# 总结 “\*” 匹配一个词   “\#”匹配多个词 #

[RabbitMQ_Topics]: https://www.cnblogs.com/toov5/p/9944291.html
[1179709-20181111225201052-1079657782.png]: /images/20220128/cb24150316fe422c8ab506bd639830a3.png
[1179709-20181111232940390-136938977.png]: /images/20220128/2323eec86362488eb113543b03f0e18d.png
[1179709-20181111232959206-1126512074.png]: /images/20220128/f997b277c1564513acda25382cd47340.png
[1179709-20181111234257970-1553251108.png]: /images/20220128/024a7b31be674ea6b83a162e42ae93cd.png
[1179709-20181111234314395-851494630.png]: /images/20220128/0ffb3854a4c54109b9518130b7787437.png