Spring boot 监听redis key 过期

1.第一步，修改redis配置文件内容

notify-keyspace-events "Ex"

2.项目导入redis依赖

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

3.添加配置application.yml

spring:
 redis:
    # 地址
    host: 127.0.0.1
    # 端口，默认为6379
    port: 6370
    # 密码
    password: root
    # 连接超时时间
    timeout: 10s
    lettuce:
      pool:
        # 连接池中的最小空闲连接
        min-idle: 0
        # 连接池中的最大空闲连接
        max-idle: 8
        # 连接池的最大数据库连接数
        max-active: 8
        # #连接池最大阻塞等待时间（使用负值表示没有限制）
        max-wait: -1ms

4.配置监听代码

public class KeyExpiredListener extends KeyExpirationEventMessageListener {
​
    private static final Logger LOGGER = LoggerFactory.getLogger(KeyExpiredListener.class);
​
    public KeyExpiredListener(RedisMessageListenerContainer listenerContainer) {
        super(listenerContainer);
    }
​
    @Override
    public void onMessage(Message message, byte[] pattern) {
        String channel = new String(message.getChannel(),StandardCharsets.UTF_8);
        //过期的key
        String key = new String(message.getBody(),StandardCharsets.UTF_8);
        LOGGER.info("redis key 过期：pattern={},channel={},key={}",new String(pattern),channel,key);
    }
}

5.配置配置文件代码

@Configuration
public class RedisConfiguration {
​
    @Autowired
    private RedisConnectionFactory redisConnectionFactory;
​
    @Bean
    public RedisMessageListenerContainer redisMessageListenerContainer() {
        RedisMessageListenerContainer redisMessageListenerContainer = new RedisMessageListenerContainer();
        redisMessageListenerContainer.setConnectionFactory(redisConnectionFactory);
        return redisMessageListenerContainer;
    }
​
    @Bean
    public KeyExpiredListener keyExpiredListener() {
        return new KeyExpiredListener(this.redisMessageListenerContainer());
    }
}