SpringBoot 监听Redis键过期事件(过期监听)

notify-keyspace-events Ex

<!--        操作redis-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

spring:
  redis:
    host: localhost
    port: 6379
    #password: 用的本机的redis，并且我没有设置redis密码
    database: 0
    lettuce:
      pool:
        # 最大阻塞等待时间，负数表示没有限制
        max-wait: -1
        # 连接池中的最大空闲连接
        max-idle: 5
        # 连接池中的最小空闲连接
        min-idle: 0
        # 连接池中最大连接数，负数表示没有限制

@RestController
@RequiredArgsConstructor
public class BasicController {
    private final StringRedisTemplate stringRedisTemplate;
    @GetMapping("/hello")
    public String hello() {
        // 设置键值对，并指定过期时间为 10 秒
        stringRedisTemplate.opsForValue().set("product:123", "dpc", Duration.ofSeconds(5));
        // 获取值
        String str = stringRedisTemplate.opsForValue().get("name");
        System.out.println("Value: " + str);
        return str;
    }
}

@Configuration
public class RedisListenerConfig {

    @Bean
    public RedisMessageListenerContainer redisMessageListenerContainer(RedisConnectionFactory connectionFactory) {
        RedisMessageListenerContainer container = new RedisMessageListenerContainer();
        container.setConnectionFactory(connectionFactory);
        return container;
    }

    @Bean
    public OrderKeyExpirationListener orderKeyExpirationListener(RedisMessageListenerContainer container) {
        // 配置监听器只监听 `order:*` 键
        OrderKeyExpirationListener listener = new OrderKeyExpirationListener(container);
        container.addMessageListener(listener, new ChannelTopic("__keyevent@0__:expired"));
        return listener;
    }

    @Bean
    public SessionKeyExpirationListener sessionKeyExpirationListener(RedisMessageListenerContainer container) {
        // 配置监听器只监听 `session:*` 键
        SessionKeyExpirationListener listener = new SessionKeyExpirationListener(container);
        container.addMessageListener(listener, new ChannelTopic("__keyevent@0__:expired"));
        return listener;
    }

    @Bean
    public ProductKeyExpirationListener productKeyExpirationListener(RedisMessageListenerContainer container) {
        // 配置监听器只监听 `product:*` 键
        ProductKeyExpirationListener listener = new ProductKeyExpirationListener(container);
        container.addMessageListener(listener, new ChannelTopic("__keyevent@0__:expired"));
        return listener;
    }


}

@Slf4j
public class SessionKeyExpirationListener extends KeyExpirationEventMessageListener {

    public SessionKeyExpirationListener(RedisMessageListenerContainer listenerContainer) {
        super(listenerContainer);
    }

    @Override
    public void onMessage(Message message, byte[] pattern) {
        String key = message.toString();
        if (key.startsWith("session:")) {
            log.info("会话【" + key + "】已过期");
            // 处理会话超时的逻辑
        }
    }
}

@Slf4j
public class ProductKeyExpirationListener extends KeyExpirationEventMessageListener {
    public ProductKeyExpirationListener(RedisMessageListenerContainer listenerContainer) {
        super(listenerContainer);
    }
    @Override
    public void onMessage(Message message, byte[] pattern) {
        String key = message.toString();
        if (key.startsWith("product:")) {
            log.info("产品【" + key + "】已过期");
            // 处理产品相关的超时逻辑
        }
    }
}

public class OrderKeyExpirationListener extends KeyExpirationEventMessageListener {

    public OrderKeyExpirationListener(RedisMessageListenerContainer listenerContainer) {
        super(listenerContainer);
    }
    @Override
    public void onMessage(Message message, byte[] pattern) {
        String key = message.toString();
        System.out.println(123);
        if (key.startsWith("order:")) {
            // 处理订单相关的超时逻辑
        }
    }
}