SpringAMQP工作队列

work queue 设计时多个消费者

实现一个队列绑定多个消费者

基本思路：

1.在publisher服务中定义测试方法，每秒产生50条信息，发送到simple.queue

@Test
    public void testSendMessage2WokrQueue() throws InterruptedException {
        String queueName = "simple.queue";
        String message = "rule world";
        for (int i = 0; i <= 50 ; i++) {
            rabbitTemplate.convertAndSend(queueName, message + i);
            Thread.sleep(20);
        }

    }

2.在consumer服务中定义两个消息监听者，都监听一个队列

@Component
public class SpringrRabbitListener {
    @RabbitListener(queues = "simple.queue")
    public void listenSimpleQueue1(String msg) throws InterruptedException {
        System.out.println("1接收到simple.queue:【"+msg+"】" + LocalTime.now());
        Thread.sleep(20);

    }
    @RabbitListener(queues = "simple.queue")
    public void listenSimpleQueue2(String msg) throws InterruptedException {
        System.err.println("2接收到simple.queue:【"+msg+"】" + LocalTime.now());
        Thread.sleep(200);

    }


}

3.消费者每秒处理50和10个消息

消费预取限制

修改yml，设置preFetch这个值，可以控制预取消息上限：

spring:
  rabbitmq:
    host: 192.168.240.135
    port: 5672
    username: itcast
    password: 123321
    virtual-host: /
    listener:
      simple:
        prefetch: 1