rabbitmq实战系列4--springboot整合rabbitmq实现限流与并发

一 并发

步骤:
1 在rabbitListener中配置concurency=“min-max”
如下代表最小并发数是5

@Component
public class pricon {
    @RabbitListener(queues ="textQueue",concurrency = "5-10")
    public void hand(String str){
        System.out.println(Thread.currentThread().getName()+"接受到了一个消息:"+str+"现在时间:"+System.currentTimeMillis()/1000);
    }
}

2测试

@Component
public class priConsumer {
    private static final String EXCHANGE = "textExchange";

    public static final String QUEUE = "textQueue";

    private static final String ROUTING_KEY = "textQueue";
    @Autowired
    RabbitTemplate template;
    public void test(){
        for(int i=50;i>1;i--){
            int finalI = i;
            template.convertAndSend(EXCHANGE,ROUTING_KEY,"queue:"+i);
        }

    }
}

3在rabbitmq的控制面板中会显示:

二 限流

1 配置Bean
setPrefetchCount 表示单位时间最多能处理多少消息

@Autowired
    CachingConnectionFactory connectionFactory;
    @Bean(name = "mqlistenerContainer")
    public SimpleRabbitListenerContainerFactory simpleRabbitListenerContainerFactory(){
        SimpleRabbitListenerContainerFactory factory=new SimpleRabbitListenerContainerFactory();
        factory.setConnectionFactory(connectionFactory);
        factory.setPrefetchCount(10);
        return factory;
    }

2在rabbitListener中配置工厂

 @RabbitListener(queues ="textQueue",concurrency = "5-10",containerFactory = "mqlistenerContainer")
    public void hand(String str){
        System.out.println(Thread.currentThread().getName()+"接受到了一个消息:"+str+"现在时间:"+System.currentTimeMillis()/1000);
    }

在控制面板中会显示:


3结果: