使用Rabbitmq进行异步消费和延迟消费_rabbitmq异步消费消息

作者RabbitmQ版本

erlang 版本：21.3

RabbitMQ 版本：3.7.14

要是用延迟消费的话，需要去下载一个插件：rabbitmq_delayed_message_exchange插件

下载地址：Community Plugins — RabbitMQ

rabbitmq-delayed-message-exchange v3.8版本适用于RabbitMQ3.7.X版本，插件要与RabbitMQ版本对应，不然会出现莫名其妙的错误

下载好后放到rabbitmq安装目录下的：plugins中

接下来直接上代码：

pom中引入需要的架包：

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

配置文件中新增RabbitMq连接信息

spring:
  rabbitmq:
    host: 127.0.0.1
    port: 5672
    username: guest
    password: guest
    virtual-host: /

配置RabbitMq

@Data
@Configuration
@ConfigurationProperties(prefix = "spring.rabbitmq")
public class RabbitMqConfig {
    private String host;
    private int port;
    private String userName;
    private String password;
 
    @Bean
    public ConnectionFactory connectionFactory() {
        CachingConnectionFactory cachingConnectionFactory = new CachingConnectionFactory(host,port);
        cachingConnectionFactory.setUsername(userName);
        cachingConnectionFactory.setPassword(password);
        cachingConnectionFactory.setVirtualHost("/");
        cachingConnectionFactory.setPublisherConfirms(true);
        return cachingConnectionFactory;
    }
 
    @Bean
    public RabbitTemplate rabbitTemplate() {
        RabbitTemplate rabbitTemplate = new RabbitTemplate(connectionFactory());
        return rabbitTemplate;
    }
}

@Configuration
public class QueueConfig {
    /**
     * 分派普通消息交换机
     */
    @Bean
    public TopicExchange topicExchange(){
       return  new TopicExchange("ordinary_exchange",true,false);
    }
 
    @Bean
    public Queue queue() {
        Queue queue = new Queue("ordinary_queue", true);
        return queue;
    }
 
    @Bean
    public Binding binding() {
        return BindingBuilder.bind(queue()).to(topicExchange()).with("ordinary_queue");
    }
 
    /**
     * 分派延迟消息交换机
     */
    @Bean
    public CustomExchange delayExchange(){
        Map<String, Object> paramMap = new HashMap<String, Object>();
        paramMap.put("x-delayed-type","direct");
        return new CustomExchange("delay_exchange","x-delayed-message",true,false,paramMap);
    }
 
    @Bean
    public Queue delayQueue(){
        Queue delayQueue = new Queue("delay_queue", true);
        return delayQueue;
    }
 
    @Bean
    public Binding delayMessagebinding(){
        return BindingBuilder.bind(delayQueue()).to(delayExchange()).with("delay_queue").noargs();
    }
}

@Service
@Slf4j
public class MessageServiceImpl implements MessageService {
    @Autowired
    private RabbitTemplate rabbitTemplate;
 
    @Override
    public void sendMsg(String queueName,String msg) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("消息发送时间:"+sdf.format(new Date()));
        rabbitTemplate.convertAndSend("ordinary_exchange", queueName, msg);
    }
 
    /**
     * 实现延迟消息
     * @param queueName
     * @param message
     */
    @Override
    public void sendDelayMessage(String queueName, String message) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        log.debug("消息发送时间：{}",sdf.format(new Date()));
        rabbitTemplate.convertAndSend("delay_exchange", queueName, message, new MessagePostProcessor() {
            @Override
            public Message postProcessMessage(Message message) throws AmqpException {
                message.getMessageProperties().setHeader("x-delay",3000);
                return message;
            }
        });
    }
}

@Component
@Slf4j
public class MessageReceiver {
    @RabbitListener(queues = "ordinary_queue")
    public void receive(String msg) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        log.debug("消息接收时间:{},接收到的消息:{}",sdf.format(new Date()),msg);
    }
 
    @RabbitListener(queues = "delay_queue")
    public void receiveDelayMessage(String message) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        log.debug("消息接收时间:{},接收到的消息:{}",sdf.format(new Date()),message);
    }
}

@RestController
public class MessageController extends BaseController {
 
    @Autowired
    private MessageService messageService;
 
    @GetMapping("send")
    public ApiRest sendMessage(String queueName, String msg){
        messageService.sendMsg(queueName,msg);
        return this.success();
    }
 
    @GetMapping("delaySend")
    public ApiRest sendDelayMessage(String queueName,String message){
        messageService.sendDelayMessage(queueName, message);
        return this.success();
    }
}

接下来测试就搞定延迟消费