springboot2.5.6集成rabbitmq,实现topic主题模式(代码片段)

1.application.yml

server:
  port: 8184
spring:
  application:
    name: rabbitmq-demo
  rabbitmq:
    host: 127.0.0.1 # ip地址
    port: 5672
    username: admin # 连接账号
    password: 123456 # 连接密码
    template:
      retry:
        enabled: true # 开启失败重试
        initial-interval: 10000ms # 第一次重试的间隔时长
        max-interval: 300000ms # 最长重试间隔，超过这个间隔将不再重试
        multiplier: 2 # 下次重试间隔的倍数，此处是2即下次重试间隔是上次的2倍
      exchange: topic.exchange # 缺省的交换机名称，此处配置后，发送消息如果不指定交换机就会使用这个
    publisher-confirm-type: correlated # 生产者确认机制，确保消息会正确发送，如果发送失败会有错误回执，从而触发重试
    publisher-returns: true
    listener:
      type: simple
      simple:
        acknowledge-mode: manual
        prefetch: 1 # 限制每次发送一条数据。
        concurrency: 3 # 同一个队列启动几个消费者
        max-concurrency: 3 # 启动消费者最大数量
        # 重试策略相关配置
        retry:
          enabled: true # 是否支持重试
          max-attempts: 5
          stateless: false
          multiplier: 1.0 # 时间策略乘数因子
          initial-interval: 1000ms
          max-interval: 10000ms
        default-requeue-rejected: true

2.pom.xml引入依赖

<!-- rabbitmq -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>

3.常量类创建

/**
 * @author kkp
 * @ClassName RabbitMqConstants
 * @date 2021/11/3 14:16
 * @Description
 */
public class RabbitMqConstants 
    public final static String TEST1_QUEUE = "test1-queue";

    public final static String TEST2_QUEUE = "test2-queue";

    public final static String EXCHANGE_NAME = "test.topic.exchange";
    /**
     * routingKey1
     */
    public final static String TOPIC_TEST1_ROUTINGKEY = "topic.test1.*";

    public final static String TOPIC_TEST1_ROUTINGKEY_TEST = "topic.test1.test";
    /**
     * routingKey1
     */
    public final static String TOPIC_TEST2_ROUTINGKEY = "topic.test2.*";

    public final static String TOPIC_TEST2_ROUTINGKEY_TEST = "topic.test2.test";

4.配置Configuration

import com.example.demo.common.RabbitMqConstants;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.*;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;

/**
 * @author kkp
 * @ClassName RabbitMqConfig
 * @date 2021/11/3 14:16
 * @Description
 */
@Slf4j
@Configuration
public class RabbitMqConfig 
    @Autowired
    private CachingConnectionFactory connectionFactory;

    /**
     *  声明交换机
     */
    @Bean(RabbitMqConstants.EXCHANGE_NAME)
    public Exchange exchange()
 //durable(true) 持久化，mq重启之后交换机还在
        // Topic模式
        //return ExchangeBuilder.topicExchange(RabbitMqConstants.EXCHANGE_NAME).durable(true).build();
        //发布订阅模式
        return ExchangeBuilder.fanoutExchange(RabbitMqConstants.EXCHANGE_NAME).durable(true).build();
    

    /**
     *  声明队列
     *  new Queue(QUEUE_EMAIL,true,false,false)
     *  durable="true" 持久化 rabbitmq重启的时候不需要创建新的队列
     *  auto-delete 表示消息队列没有在使用时将被自动删除 默认是false
     *  exclusive  表示该消息队列是否只在当前connection生效,默认是false
     */
    @Bean(RabbitMqConstants.TEST1_QUEUE)
    public Queue esQueue() 
        return new Queue(RabbitMqConstants.TEST1_QUEUE);
    

    /**
     *  声明队列
     */
    @Bean(RabbitMqConstants.TEST2_QUEUE)
    public Queue gitalkQueue() 
        return new Queue(RabbitMqConstants.TEST2_QUEUE);
    

    /**
     *  TEST1_QUEUE队列绑定交换机，指定routingKey
     */
    @Bean
    public Binding bindingEs(@Qualifier(RabbitMqConstants.TEST1_QUEUE) Queue queue,
                             @Qualifier(RabbitMqConstants.EXCHANGE_NAME) Exchange exchange) 
        return BindingBuilder.bind(queue).to(exchange).with(RabbitMqConstants.TOPIC_TEST1_ROUTINGKEY).noargs();
    

    /**
     *  TEST2_QUEUE队列绑定交换机，指定routingKey
     */
    @Bean
    public Binding bindingGitalk(@Qualifier(RabbitMqConstants.TEST2_QUEUE) Queue queue,
                                 @Qualifier(RabbitMqConstants.EXCHANGE_NAME) Exchange exchange) 
        return BindingBuilder.bind(queue).to(exchange).with(RabbitMqConstants.TOPIC_TEST2_ROUTINGKEY).noargs();
    

    /**
     * 如果需要在生产者需要消息发送后的回调，
     * 需要对rabbitTemplate设置ConfirmCallback对象，
     * 由于不同的生产者需要对应不同的ConfirmCallback，
     * 如果rabbitTemplate设置为单例bean，
     * 则所有的rabbitTemplate实际的ConfirmCallback为最后一次申明的ConfirmCallback。
     * @return
     */
    @Bean
    @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE)
    public RabbitTemplate rabbitTemplate() 
         RabbitTemplate template = new RabbitTemplate(connectionFactory);
        return template;
    

5.Rabbit工具类创建

import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.connection.CorrelationData;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.UUID;
/**
 * @author kkp
 * @ClassName RabbitMqUtils
 * @date 2021/11/3 14:21
 * @Description
 */
@Slf4j
@Component
public class RabbitMqUtils implements RabbitTemplate.ConfirmCallback, RabbitTemplate.ReturnCallback

    private RabbitTemplate rabbitTemplate;

    /**
     * 构造方法注入
     */
    @Autowired
    public RabbitMqUtils(RabbitTemplate rabbitTemplate) 
        this.rabbitTemplate = rabbitTemplate;
        //这是是设置回调能收到发送到响应
        rabbitTemplate.setConfirmCallback(this);
        //如果设置备份队列则不起作用
        rabbitTemplate.setMandatory(true);
        rabbitTemplate.setReturnCallback(this);
    

    /**
     * 回调确认
     */
    @Override
    public void confirm(CorrelationData correlationData, boolean ack, String cause) 
        if(ack)
            log.info("消息发送成功：correlationData(),ack(),cause()",correlationData,ack,cause);
        else
            log.info("消息发送失败：correlationData(),ack(),cause()",correlationData,ack,cause);
        
    

    /**
     * 消息发送到转换器的时候没有对列,配置了备份对列该回调则不生效
     * @param message
     * @param replyCode
     * @param replyText
     * @param exchange
     * @param routingKey
     */
    @Override
    public void returnedMessage(Message message, int replyCode, String replyText, String exchange, String routingKey) 
        log.info("消息丢失：exchange(),route(),replyCode(),replyText(),message:",exchange,routingKey,replyCode,replyText,message);
    

    /**
     * 发送到指定Queue
     * @param queueName
     * @param obj
     */
    public void send(String queueName, Object obj)
        CorrelationData correlationId = new CorrelationData(UUID.randomUUID().toString());
        this.rabbitTemplate.convertAndSend(queueName, obj, correlationId);
    

    /**
     * 1、交换机名称
     * 2、routingKey
     * 3、消息内容
     */
    public void sendByRoutingKey(String exChange, String routingKey, Object obj)
        CorrelationData correlationId = new CorrelationData(UUID.randomUUID().toString());
        this.rabbitTemplate.convertAndSend(exChange, routingKey, obj, correlationId);
    

6.service创建

public interface TestService 

    String sendTest1(String content);

    String sendTest2(String content);

7.impl实现

import com.example.demo.common.RabbitMqConstants;
import com.example.demo.util.RabbitMqUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
 * @author kkp
 * @ClassName TestServiceImpl
 * @date 2021/11/3 14:24
 * @Description
 */
@Service
@Slf4j
public class TestServiceImpl implements TestService 

    @Autowired
    private RabbitMqUtils rabbitMqUtils;

    @Override
    public String sendTest1(String content) 
        rabbitMqUtils.sendByRoutingKey(RabbitMqConstants.EXCHANGE_NAME,
                RabbitMqConstants.TOPIC_TEST1_ROUTINGKEY_TEST, content);
        log.info(RabbitMqConstants.TOPIC_TEST1_ROUTINGKEY_TEST+"***************发送成功*****************");
        return "发送成功！";
    

    @Override
    public String sendTest2(String content) 
        rabbitMqUtils.sendByRoutingKey(RabbitMqConstants.EXCHANGE_NAME,
                RabbitMqConstants.TOPIC_TEST2_ROUTINGKEY_TEST, content);
        log.info(RabbitMqConstants.TOPIC_TEST2_ROUTINGKEY_TEST+"***************发送成功*****************");
        return "发送成功！";
    

8.监听类

import com.example.demo.common.RabbitMqConstants;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.core.ExchangeTypes;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

import com.rabbitmq.client.Channel;

/**
 * @author kkp
 * @ClassName RabbitMqListener
 * @date 2021/11/3 14:22
 * @Description
 */

@Slf4j
@Component
public class RabbitMqListener 

    @RabbitListener(queues = RabbitMqConstants.TEST1_QUEUE)
    public void test1Consumer(Message message, Channel channel) 
        try 
            //手动确认消息已经被消费
            channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
            log.info("Counsoum1消费消息：" + message.toString() + "。成功！");
         catch (Exception e) 
            e.printStackTrace();
            log.info("Counsoum1消费消息：" + message.toString() + "。失败！");
        
    

    @RabbitListener(queues = RabbitMqConstants.TEST2_QUEUE)
    public void test2Consumer(Message message, Channel channel) 
        try 
            //手动确认消息已经被消费
            channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
            log.info("Counsoum2消费消息：" + message.toString() + "。成功！");
         catch (Exception e) 
            e.printStackTrace();
            log.info("Counsoum2消费消息：" + message.toString() + "。失败！");
        
    

9.Controller测试

import com.example.demo.server.TestService;
import jdk.nashorn.internal.objects.annotations.Getter;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.Map;

/**
 * @author kkp
 * @ClassName TestController
 * @date 2021/11/3 14:25
 * @Description
 */
@Slf4j
@RestController
@RequestMapping("/enterprise")
public class TestController 

    @Autowired
    private TestService testService;

    @GetMapping("/finance")
    public String hello3(@RequestParam(required = false) Map<String, Object> params) 
        return testService.sendTest2(params.get("entId").toString());
    
    /**
     * 发送消息test2
     * @param content
     * @return
     */
    @PostMapping(value = "/finance2")
    public String sendTest2(@RequestBody String content) 
        return testService.sendTest2(content);