Spring Boot 整合 RabbitMQ 之 Fanout Exchange模式 (三)

Love The Way You Lie 2024-02-18 16:17 37阅读 0赞

摘要：那前面已经介绍过了Direct模式 (一)Topic转发模式 (二)，这次介绍下Fanout Exchange形式又叫广播形式,因此我们发送到路由器的消息会使得绑定到该路由器的每一个Queue接收到消息,这个时候就算指定了Key,或者规则(即上文中convertAndSend方法的参数2),也会被忽略!那么直接上代码,发送端配置如下:

package com.micai.springboot.mq.config;
    
    import com.micai.springboot.base.BaseConfig;
    import org.springframework.amqp.core.*;
    import org.springframework.beans.factory.annotation.Qualifier;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    /**
     * 描述：Topic转发模式
     * <p>
     * Author: 赵新国
     * Date: 2017/11/3 18:51
     */
    @Configuration
    public class SenderConf extends BaseConfig {
    
        // ---------------------------------------------------- Direct 形式 -------------------------------------------- //
    
        /*@Bean
        public Queue queue() {
            return new Queue(QUEUE_KEY);
        }*/
    
        // ---------------------------------------------------- Topic 形式 -------------------------------------------- //
    
        /*@Bean(name = "message")
        public Queue queueMessage() {
            return new Queue("topic.message");
        }
    
        @Bean(name = "messages")
        public Queue queueMessages() {
            return new Queue("topic.messages");
        }
    
        @Bean
        public TopicExchange exchange() {
            return new TopicExchange("exchange");
        }
    
        @Bean
        Binding bindingExchangeMessage(@Qualifier("message") Queue queueMessage, TopicExchange exchange) {
            return BindingBuilder.bind(queueMessage).to(exchange).with("topic.message");
        }
    
        @Bean
        Binding bindingExchangeMessages(@Qualifier("messages") Queue queueMessages, TopicExchange exchange) {
            return BindingBuilder.bind(queueMessages).to(exchange).with("topic.#");//*表示一个词,#表示零个或多个词
        }*/
    
        // -------------------------------------------- Fanout Exchange形式 ------------------------------------------- //
    
        @Bean(name="Amessage")
        public Queue AMessage() {
            return new Queue("fanout.A");
        }
    
    
        @Bean(name="Bmessage")
        public Queue BMessage() {
            return new Queue("fanout.B");
        }
    
        @Bean(name="Cmessage")
        public Queue CMessage() {
            return new Queue("fanout.C");
        }
    
        @Bean
        FanoutExchange fanoutExchange() {
            return new FanoutExchange("fanoutExchange");//配置广播路由器
        }
    
        @Bean
        Binding bindingExchangeA(@Qualifier("Amessage") Queue AMessage,FanoutExchange fanoutExchange) {
            return BindingBuilder.bind(AMessage).to(fanoutExchange);
        }
    
        @Bean
        Binding bindingExchangeB(@Qualifier("Bmessage") Queue BMessage, FanoutExchange fanoutExchange) {
            return BindingBuilder.bind(BMessage).to(fanoutExchange);
        }
    
        @Bean
        Binding bindingExchangeC(@Qualifier("Cmessage") Queue CMessage, FanoutExchange fanoutExchange) {
            return BindingBuilder.bind(CMessage).to(fanoutExchange);
        }
    
    }

发送端使用如下代码发送:

package com.micai.springboot.mq;
    
    import com.micai.springboot.base.BaseConfig;
    import com.micai.springboot.entity.User;
    import org.springframework.amqp.core.AmqpTemplate;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
    
    /**
     * 描述：消息生产者
     * <p>
     * Author: 赵新国
     * Date: 2017/11/3 15:37
     */
    @Component
    public class Sender extends BaseConfig {
    
        @Autowired
        private AmqpTemplate rabbitTemplate;
    
        public void send() {
            // ---------------------------------------------------- Direct 形式 -------------------------------------------- //
            // 在该生产者，我们会产生一个字符串，并发送到名为hello的队列中
            /*String context = "Hello " + "Rabbit MQ！";
            System.out.println("发送MQ消息 : " + context);
            this.rabbitTemplate.convertAndSend(QUEUE_KEY, context);*/
    
            // 发送对象，但是该对象必须实现Serializable接口
            /*User user = new User(); //实现Serializable接口
            user.setId(1L);
            user.setName("张三");
            this.rabbitTemplate.convertAndSend(QUEUE_KEY, user);*/
    
            // ---------------------------------------------------- Topic 形式 -------------------------------------------- //
            /*this.rabbitTemplate.convertAndSend("exchange", "topic.message", "hello, rabbit!");*/
    
            // -------------------------------------------- Fanout Exchange形式 ------------------------------------------- //
            this.rabbitTemplate.convertAndSend("fanoutExchange", "", "xixi,hlhdidi");// 参数2将被忽略
        }
    
    }

接收端监听器配置如下:

package com.micai.springboot.mq;
    
    import com.micai.springboot.base.BaseConfig;
    import com.micai.springboot.entity.User;
    import org.springframework.amqp.rabbit.annotation.RabbitListener;
    import org.springframework.stereotype.Component;
    
    /**
     * 描述：消息消费者
     * @RabbitListener注解定义该类对hello队列的监听，
     * 并用@RabbitHandler注解来指定对消息的处理方法。
     * 所以，该消费者实现了对hello队列的消费，消费操作为输出消息的字符串内容
     * Author: 赵新国
     * Date: 2017/11/3 15:42
     */
    @Component
    public class Receiver extends BaseConfig {
    
        // ---------------------------------------------------- Direct 形式 -------------------------------------------- //
        //监听器监听指定的Queue
        /*@RabbitListener(queues = QUEUE_KEY)
        public void process(String str) {
            System.out.println("接收MQ消息 : " + str);
        }*/
    
        // //监听器监听指定的Queue
        /*@RabbitListener(queues = QUEUE_KEY)
        public void process(User user) { //用User作为参数
            System.out.println("接收MQ消息 : " + user);
        }*/
    
        // ---------------------------------------------------- Topic 形式 -------------------------------------------- //
        /*@RabbitListener(queues="topic.message")    //监听器监听指定的Queue
        public void process1(String str) {
            System.out.println("message:"+str);
        }
    
        @RabbitListener(queues="topic.messages")    //监听器监听指定的Queue
        public void process2(String str) {
            System.out.println("messages:"+str);
        }*/
    
    
        // -------------------------------------------- Fanout Exchange形式 ------------------------------------------- //
        @RabbitListener(queues="fanout.A")
        public void processA(String str1) {
            System.out.println("ReceiveA:"+str1);
        }
    
        @RabbitListener(queues="fanout.B")
        public void processB(String str) {
            System.out.println("ReceiveB:"+str);
        }
    
        @RabbitListener(queues="fanout.C")
        public void processC(String str) {
            System.out.println("ReceiveC:"+str);
        }
    
    }

运行测试代码,发现三个监听器都接收到了数据,测试成功，结果如下图：

![Center][]

源代码下载地址： [https://gitee.com/micai/micai-springboot/tree/master/micai-springboot-rabbitmq-7][https_gitee.com_micai_micai-springboot_tree_master_micai-springboot-rabbitmq-7]

[Center]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/29/7489baba240e4ec0a4f9e3747846717b.png
[https_gitee.com_micai_micai-springboot_tree_master_micai-springboot-rabbitmq-7]: https://gitee.com/micai/micai-springboot/tree/master/micai-springboot-rabbitmq-7