创建交换机、队列以及绑定关系

系统管理员 2023-10-15 23:49 46阅读 0赞

#### 1、网页界面创建 ####

#### 2、AmqpAdmin创建 ####

package com.itheima;
    import org.junit.jupiter.api.Test;
    import org.springframework.amqp.core.AmqpAdmin;
    import org.springframework.amqp.core.Queue;
    import org.springframework.amqp.rabbit.core.RabbitAdmin;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.test.context.SpringBootTest;
    import org.springframework.context.annotation.Bean;
    
    @SpringBootTest
    class Springboot08SsmpApplicationTests {
        
    
        @Autowired
        private AmqpAdmin amqpAdmin;
        @Test
        void contextLoads() {
        
            Queue fanoutSmsQueue = new Queue("9999", true, false, false);
            amqpAdmin.declareQueue(fanoutSmsQueue);
        }
    }

#### 3、创建bean，工程自动创建 ####

package com.itheima.config;
    
    import com.itheima.producer.ConfirmCallback;
    import com.itheima.producer.ReturnCallback;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.amqp.core.*;
    import org.springframework.amqp.rabbit.core.RabbitTemplate;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.beans.factory.annotation.Qualifier;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    import javax.annotation.PostConstruct;
    
    /**
     * @author xx
     * @date 2023/9/22
     * springboot自动读取yml文件自动配置，这里可删
     * 定义完成后 rabbitmq服务器会自动创建交换机和队列以及绑定关系
     * 在Spring启动时，利用Spring Bean管理工厂BeanFactory接口，实现动态创建交换机、队列、交换机和队列的绑定关系，让我们无需进行重复的编码工作。
     */
    @Slf4j
    @Configuration
    public class RabbitMQConfig {
        
        /**
         * 队列
         */
        public static final String QUEUE1 = "atguigu";
        public static final String QUEUE2 = "atguigu.news";
        public static final String QUEUE3 = "atguigu.emps";
        public static final String QUEUE4 = "gulixueyuan.news";
    
        /**
         * 定义交换机名称
         */
        public static final String EXCHANGE_DIRECT_NAME = "exchange.direct";
        public static final String EXCHANGE_FANOUT_NAME = "exchange.fanout";
        public static final String EXCHANGE_TOPIC_NAME = "exchange.topic";
        /**
         * 设置路由key
         * #匹配0个或多个单词，*匹配一个单词
         */
        public static final String ROUTINGKEY1 = "atguigu";
        public static final String ROUTINGKEY2 = "atguigu.news";
        public static final String ROUTINGKEY3 = "atguigu.emps";
        public static final String ROUTINGKEY4 = "gulixueyuan.news";
        public static final String ROUTINGKEY5 = "atguigu.#";
        public static final String ROUTINGKEY6 = "*.news";
    
        /**
         * 定义 直连交换机
         */
        @Bean("directExchange")
        public DirectExchange directExchange() {
        
            //参数 交换机名称
            return new DirectExchange(EXCHANGE_DIRECT_NAME, true, false);
        }
    
        /**
         * 定义 扇形交换机
         */
        @Bean("fanoutExchange")
        public FanoutExchange fanoutExchange() {
        
            //参数 交换机名称
            return new FanoutExchange(EXCHANGE_FANOUT_NAME, true, false);
        }
    
        /**
         * 定义 主题交换机
         */
        @Bean("topicExchange")
        public TopicExchange topicExchange() {
        
            //参数 交换机名称
            return new TopicExchange(EXCHANGE_TOPIC_NAME, true, false);
        }
    
        /**
         * 创建队列
         * 参数一:队列名称
         * 参数二durable:是否持久化,默认是false,持久化队列：会被存储在磁盘上，当消息代理重启时仍然存在，暂存队列：当前连接有效
         * 参数三exclusive:默认也是false，是否独占队列
         * 参数四autoDelete:是否自动删除，当没有生产者或者消费者使用此队列，该队列会自动删除。
         */
        @Bean("queue1")
        public Queue queue1() {
        
            return new Queue(QUEUE1, true, false, false);
        }
    
        @Bean("queue2")
        public Queue queue2() {
        
            return new Queue(QUEUE2, true, false, false);
        }
    
        @Bean("queue3")
        public Queue queue3() {
        
            return new Queue(QUEUE3, true, false, false);
        }
    
        @Bean("queue4")
        public Queue queue4() {
        
            return new Queue(QUEUE4, true, false, false);
        }
    
        /**
         * 队列绑定交换机
         *
         * @param queue         队列注入到容器的id，也就是方法名 Queue1
         * @param directExchange 交换机注入到容器的id，也就是方法名 directExchange
         * @return
         */
        @Bean
        public Binding bindingQueue1DirectExchange(@Qualifier("queue1") Queue queue, @Qualifier("directExchange") DirectExchange directExchange) {
        
            return BindingBuilder.bind(queue).to(directExchange).with(ROUTINGKEY1);
        }
    
        @Bean
        public Binding bindingQueue2DirectExchange(@Qualifier("queue2") Queue queue, @Qualifier("directExchange") DirectExchange directExchange) {
        
            return BindingBuilder.bind(queue).to(directExchange).with(ROUTINGKEY2);
        }
    
        @Bean
        public Binding bindingQueue3DirectExchange(@Qualifier("queue3") Queue queue, @Qualifier("directExchange") DirectExchange directExchange) {
        
            return BindingBuilder.bind(queue).to(directExchange).with(ROUTINGKEY3);
        }
    
        @Bean
        public Binding bindingQueue4DirectExchange(@Qualifier("queue4") Queue queue, @Qualifier("directExchange") DirectExchange directExchange) {
        
            return BindingBuilder.bind(queue).to(directExchange).with(ROUTINGKEY4);
        }
    
        @Bean
        public Binding bindingQueue1FanoutExchange(@Qualifier("queue1") Queue queue, @Qualifier("fanoutExchange") FanoutExchange fanoutExchange) {
        
            return BindingBuilder.bind(queue).to(fanoutExchange);
        }
    
        @Bean
        public Binding bindingQueue2FanoutExchange(@Qualifier("queue2") Queue queue, @Qualifier("fanoutExchange") FanoutExchange fanoutExchange) {
        
            return BindingBuilder.bind(queue).to(fanoutExchange);
        }
    
        @Bean
        public Binding bindingQueue3FanoutExchange(@Qualifier("queue3") Queue queue, @Qualifier("fanoutExchange") FanoutExchange fanoutExchange) {
        
            return BindingBuilder.bind(queue).to(fanoutExchange);
        }
    
        @Bean
        public Binding bindingQueue4FanoutExchange(@Qualifier("queue4") Queue queue, @Qualifier("fanoutExchange") FanoutExchange fanoutExchange) {
        
            return BindingBuilder.bind(queue).to(fanoutExchange);
        }
    
        @Bean
        public Binding bindingQueue1TopicExchange(@Qualifier("queue1") Queue queue, @Qualifier("topicExchange") TopicExchange topicExchange) {
        
            return BindingBuilder.bind(queue).to(topicExchange).with(ROUTINGKEY5);
        }
    
        @Bean
        public Binding bindingQueue2TopicExchange(@Qualifier("queue2") Queue queue, @Qualifier("topicExchange") TopicExchange topicExchange) {
        
            return BindingBuilder.bind(queue).to(topicExchange).with(ROUTINGKEY5);
        }
    
        @Bean
        public Binding bindingQueue3TopicExchange(@Qualifier("queue3") Queue queue, @Qualifier("topicExchange") TopicExchange topicExchange) {
        
            return BindingBuilder.bind(queue).to(topicExchange).with(ROUTINGKEY5);
        }
    
        @Bean
        public Binding bindingQueue4TopicExchange(@Qualifier("queue4") Queue queue, @Qualifier("topicExchange") TopicExchange topicExchange) {
        
            return BindingBuilder.bind(queue).to(topicExchange).with(ROUTINGKEY6);
        }
    
    }

#### 4、@RabbitListener ####

加在方法上：

/**
     * 队列不存在时，需要创建一个队列，并且与exchange绑定
     */
    @RabbitListener(bindings = @QueueBinding(
            value = @Queue(value = "topic.n1", durable = "true", autoDelete = "false"),
            exchange = @Exchange(value = "topic.e", type = ExchangeTypes.TOPIC),
            key = "r"))
    public void consumerNoQueue(String data) {
        
        System.out.println("consumerNoQueue: " + data);
    }

加在类上需要@RabbitHandler

package com.itheima.service.impl;
    
    import com.baomidou.mybatisplus.core.mapper.BaseMapper;
    import com.baomidou.mybatisplus.extension.service.IService;
    import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
    import com.itheima.domain.Book;
    import com.itheima.mapper.BookMapper;
    import com.itheima.service.BookService;
    import org.springframework.amqp.core.ExchangeTypes;
    import org.springframework.amqp.rabbit.annotation.*;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    @RabbitListener(bindings = @QueueBinding(
            value = @Queue(value = "topic.n1", durable = "true", autoDelete = "true"),
            exchange = @Exchange(value = "topic.e", type = ExchangeTypes.TOPIC),
            key = "r"))
    @Service
    public class BookServiceImpl extends ServiceImpl<BookMapper, Book> implements BookService {
        
    
        @Autowired
        private BookMapper bookMapper;
        @Override
        @RabbitHandler
        public Book queryById(Integer id) {
        
            Book book = bookMapper.selectById(id);
            return book;
        }
    }