SpringBoot集成Redisson实现延迟队列

使用场景

1. 下单成功，30分钟未支付。支付超时，自动取消订单
2. 订单签收，签收后7天未进行评价。订单超时未评价，系统默认好评
3. 下单成功，商家5分钟未接单，订单取消
4. 配送超时，推送短信提醒
5. 其它

对于延时比较长的场景、实时性不高的场景，我们可以采用任务调度的方式定时轮询处理。如：xxl-job

项目地址

gitee地址

实现说明

1. 引入 Redisson 依赖

<dependency>
    <groupId>org.redisson</groupId>
    <artifactId>redisson-spring-boot-starter</artifactId>
    <version>3.15.4</version>
</dependency>

2. Nacos 配置 Redis 连接

spring:
  redis:
    host: 127.0.0.1
    port: 6379
    password: 123456
    database: 1
    timeout: 6000

3. 创建 RedissonConfig 配置

/**
 * 创建 RedissonConfig 配置
 * <p>
 * Created by michael on 2021-04-25.
 */
@Configuration
public class RedissonConfig {

    @Value("${spring.redis.host}")
    private String host;

    @Value("${spring.redis.port}")
    private int port;

    @Value("${spring.redis.database}")
    private int database;

    @Value("${spring.redis.password}")
    private String password;

    @Bean
    public RedissonClient redissonClient() {
        Config config = new Config();
        config.useSingleServer()
                .setAddress("redis://" + host + ":" + port)
                .setDatabase(database)
                .setPassword(password);
        return Redisson.create(config);
    }
}

4. 封装 Redis 延迟队列工具类

/**
 * 封装 Redis 延迟队列工具
 * <p>
 * Created by michael on 2021-04-25.
 */
@Slf4j
@Component
public class RedisDelayQueueUtil {

    @Autowired
    private RedissonClient redissonClient;

    /**
     * 添加延迟队列
     *
     * @param t
     * @param delay
     * @param timeUnit
     * @param queueCode
     * @param <T>
     */
    public <T> void addDelayQueue(T t, long delay, TimeUnit timeUnit, String queueCode) {
        try {
            RBlockingDeque<Object> blockingDeque = redissonClient.getBlockingDeque(queueCode);
            RDelayedQueue<Object> delayedQueue = redissonClient.getDelayedQueue(blockingDeque);
            delayedQueue.offer(t, delay, timeUnit);
            log.info("添加延时队列成功，队列键：{}，队列值：{}，延迟时间：{}", queueCode, t, timeUnit.toSeconds(delay) + "秒");
        } catch (Exception e) {
            log.error("添加延时队列失败：{}", e.getMessage());
            throw new RuntimeException("添加延时队列失败");
        }
    }

    /**
     * 获取延迟队列
     *
     * @param queueCode
     * @param <T>
     * @return
     * @throws InterruptedException
     */
    public <T> T getDelayQueue(String queueCode) throws InterruptedException {
        RBlockingDeque<Map> blockingDeque = redissonClient.getBlockingDeque(queueCode);
        T value = (T) blockingDeque.take();
        return value;
    }
}

5. SpringUtil 工具类

/**
 * SpringUtil 工具类
 * <p>
 * Created by michael on 2021-04-25.
 */
@Slf4j
@Component
public class SpringUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    /**
     * 服务器启动，Spring容器初始化时，当加载了当前类为bean组件后，将会调用下面方法注入ApplicationContext实例
     *
     * @param applicationContext
     * @throws BeansException
     */
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        log.info("applicationContext 初始化了");
        SpringUtil.applicationContext = applicationContext;
    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    public static <T> T getBean(String beanId) {
        return (T) applicationContext.getBean(beanId);
    }

    public static <T> T getBean(Class<T> clazz) {
        return (T) applicationContext.getBean(clazz);
    }
}

6. 创建延迟队列业务枚举

/**
 * 延迟队列业务枚举
 * <p>
 * Created by michael on 2021-04-25.
 */
@Getter
@NoArgsConstructor
@AllArgsConstructor
public enum RedisDelayQueue {

    ORDER_PAYMENT_TIMEOUT("ORDER_PAYMENT_TIMEOUT", "订单支付超时，自动取消订单", "orderPaymentTimeout"),

    ORDER_TIMEOUT_NOT_EVALUATED("ORDER_TIMEOUT_NOT_EVALUATED", "订单超时未评价，系统默认好评", "orderTimeoutNotEvaluated"),

    ;

    /**
     * 延迟队列 Redis Key
     */
    private String code;

    /**
     * 中文描述
     */
    private String desc;

    /**
     * 延迟队列具体业务实现的 Bean
     * 可通过 Spring 的上下文获取
     */
    private String beanId;
}

7. 定义延迟队列执行器

/**
 * 延迟队列执行器
 * <p>
 * Created by michael on 2021-04-25.
 */
public interface RedisDelayQueueHandle<T> {

    void execute(T t);
}

8. 创建枚举中定义的Bean，并实现延迟队列执行器

• OrderPaymentTimeout：订单支付超时延迟队列处理类

/**
 * 订单支付超时处理
 * <p>
 * Created by michael on 2021-04-25.
 */
@Slf4j
@Component
public class OrderPaymentTimeout implements RedisDelayQueueHandle<Map<String, Object>> {

    @Override
    public void execute(Map<String, Object> map) {
        // TODO-MICHAEL: 2021-04-25 订单支付超时，自动取消订单处理业务...
        log.info("收到订单支付超时延迟消息：{}", map);
    }
}

• OrderTimeoutNotEvaluated：订单超时未评价延迟队列处理类

/**
 * 订单超时未评价处理
 * <p>
 * Created by michael on 2021-04-25.
 */
@Slf4j
@Component
public class OrderTimeoutNotEvaluated implements RedisDelayQueueHandle<Map<String, Object>> {

    @Override
    public void execute(Map<String, Object> map) {
        // TODO-MICHAEL: 2021-04-25 订单超时未评价，系统默认好评处理业务...
        log.info("收到订单超时未评价延迟消息：{}", map);
    }
}

9. 创建延迟队列消费线程，项目启动完成后开启

/**
 * 创建延迟队列消费线程
 * <p>
 * Created by michael on 2021-04-25.
 */
@Slf4j
@Component
public class RedisDelayQueueRunner implements CommandLineRunner {

    @Autowired
    private RedisDelayQueueUtil redisDelayQueueUtil;

    @Autowired
    private SpringUtil springUtil;

    /**
     * 启动延迟队列
     *
     * @param args
     */
    @Override
    public void run(String... args) {
        new Thread(() -> {
            while (true) {
                try {
                    RedisDelayQueue[] queues = RedisDelayQueue.values();
                    for (RedisDelayQueue queue : queues) {
                        Object o = redisDelayQueueUtil.getDelayQueue(queue.getCode());
                        if (null != o) {
                            RedisDelayQueueHandle redisDelayQueueHandle = springUtil.getBean(queue.getBeanId());
                            redisDelayQueueHandle.execute(o);
                        }
                    }
                } catch (InterruptedException e) {
                    log.error("Redis延迟队列异常中断：{}", e.getMessage());
                }
            }
        }).start();
        log.info("Redis延迟队列启动成功");
    }
}

以上步骤，Redis 延迟队列核心代码已经完成，下面写一个测试接口，用 PostMan 模拟测试一下

10. 创建一个测试接口，模拟添加延迟队列

/**
 * 延迟队列测试
 * <p>
 * Created by michael on 2021-04-25.
 */
@RestController
@RequestMapping("/api/redis/delayQueue")
public class RedisDelayQueueController {

    @Autowired
    private RedisDelayQueueUtil redisDelayQueueUtil;

    @PostMapping("/add")
    public void addQueue() {
        Map<String, Object> map1 = new HashMap<>();
        map1.put("orderId", "100");
        map1.put("remark", "订单支付超时，自动取消订单");

        Map<String, String> map2 = new HashMap<>();
        map2.put("orderId", "200");
        map2.put("remark", "订单超时未评价，系统默认好评");

        // 添加订单支付超时，自动取消订单延迟队列。为了测试效果，延迟10秒钟
        redisDelayQueueUtil.addDelayQueue(map1, 10, TimeUnit.SECONDS, RedisDelayQueue.ORDER_PAYMENT_TIMEOUT.getCode());

        // 订单超时未评价，系统默认好评。为了测试效果，延迟20秒钟
        redisDelayQueueUtil.addDelayQueue(map2, 20, TimeUnit.SECONDS, RedisDelayQueue.ORDER_TIMEOUT_NOT_EVALUATED.getCode());
    }
}

11. 启动 SpringBoot 项目，用 PostMan 调用接口添加延迟队列

• 通过 Redis 客户端可看到两个延迟队列已添加成功
  

• 查看 IDEA 控制台日志可看到延迟队列已消费成功