益阳网站seo,免费建造公司网站,网站开发的环境,学seo哪个培训好场景 用户下单后#xff0c;如果30min未支付#xff0c;则删除该订单#xff0c;这时候就要可以用延迟队列 准备 利用rabbitmq_delayed_message_exchange插件#xff1b; 首先下载该插件#xff1a;https://www.rabbitmq.com/community-plugins.html 然后把该插件放到rabb…场景 用户下单后如果30min未支付则删除该订单这时候就要可以用延迟队列 准备 利用rabbitmq_delayed_message_exchange插件 首先下载该插件https://www.rabbitmq.com/community-plugins.html 然后把该插件放到rabbitmq安装目录plugins下 进入到sbin目录下执行rabbitmq-plugins.bat enable rabbitmq_delayed_message_exchange; 关闭RabbitMQ服务然后再启动直接重启该插件可能会不生效。 SpringBoot RabbitMQ代码 application.properties配置文件 spring.application.namespring-boot-rabbitmq
spring.rabbitmq.hostlocalhost
spring.rabbitmq.port5672
spring.rabbitmq.usernamenut
spring.rabbitmq.passwordnut 配置类 注意这里的x-delayed-type和x-delayed-message /*** 延迟队列配置exchange*/
Configuration
public class DelayQueueConfig {public static final String DELAY_EXCHANGE DELAY_EXCHANGE;public static final String DELAY_QUEUE DELAY_QUEUE;public static final String DELAY_ROUTING_KEY DELAY_ROUTING_KEY;Bean(delayExchange)public Exchange delayExchange() {MapString, Object args new HashMap(1);
// x-delayed-type 声明 延迟队列Exchange的类型args.put(x-delayed-type, direct);return new CustomExchange(DELAY_EXCHANGE, x-delayed-message,true, false,args);}Bean(delayQueue)public Queue delayQueue() {return QueueBuilder.durable(DELAY_QUEUE).build();}/*** 将延迟队列通过routingKey绑定到延迟交换器** return*/Beanpublic Binding delayQueueBindExchange() {return new Binding(DELAY_QUEUE, Binding.DestinationType.QUEUE, DELAY_EXCHANGE, DELAY_ROUTING_KEY, null);}} 生产者 发送消息时指定延迟的毫秒 /*** 延迟队列发送者*/
Component
Slf4j
public class DelayQueueSender {Autowiredprivate RabbitTemplate rabbitTemplate;public void sendDelayQueue(int number) {log.warn(延迟队列发送 : {} milliseconds, number);// 这里的Exchange可以是业务的Exchange为了方便测试这里直接往死信Exchange里投递消息rabbitTemplate.convertAndSend(DelayQueueConfig.DELAY_EXCHANGE,DelayQueueConfig.DELAY_ROUTING_KEY,number, (message) - {// 设置延迟的毫秒数message.getMessageProperties().setDelay(number);log.info(Now : {}, ZonedDateTime.now());return message;});}
} 消费者 /*** 延迟队列消费者*/
Component
Slf4j
RabbitListener(queues DelayQueueConfig.DELAY_QUEUE)
public class DelayQueueConsumer {RabbitHandlerpublic void receiveDelayMessage(Integer milliseconds){log.warn(DelayQueueConsumer Time : {} and the millis : {}, ZonedDateTime.now(), milliseconds);}} 测试 先启动项目 然后在测试类中发送消息 RunWith(SpringRunner.class)
SpringBootTest
public class RabbitmqApplicationTests {Autowiredprivate DelayQueueSender delayQueueSender;Testpublic void testDelayQueueSender(){delayQueueSender.sendDelayQueue(5000);}
} 发送消息窗口 消费者受到消息 时间间隔证明延迟队列发送完成 参考 https://blog.csdn.net/linsongbin1/article/details/80178122 https://blog.csdn.net/youjin/article/details/82586888 https://docs.spring.io/spring-amqp/docs/2.0.0.M2/reference/htmlsingle/#delayed-message-exchange https://www.rabbitmq.com/blog/2015/04/16/scheduling-messages-with-rabbitmq/ 转载于:https://www.cnblogs.com/theRhyme/p/10986409.html
