1 修改 redis.conf配置文件：
K Keyspace events, published with keyspace@ prefix事件
E Keyevent events, published with keyevent@ prefix
g Generic commands (non-type specific) like DEL, EXPIRE, RENAME, …
$ String commands
l List commands
s Set commands
h Hash commands
z Sorted set commands
x Expired events (events generated every time a key expires)
e Evicted events (events generated when a key is evicted for maxmemory)
A Alias for g$lshzxe, so that the “AKE” string means all the events.
redis.conf 的默认的配置是：notify-keyspace-events ""
我们需要改为：notify-keyspace-events Ex
即对应上面的键的过期事件。修改玩这个重启一下redis
2 客户端来监听redis的过期事件：
@Configuration
public class RedisListenerConfig {
@Bean
RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory) {
RedisMessageListenerContainer container = new RedisMessageListenerContainer();
container.setConnectionFactory(connectionFactory);
return container;
}
}
3.书写一个监听器
@Slf4j
@Component
public class RedisKeyExpirationListener extends KeyExpirationEventMessageListener {
public RedisKeyExpirationListener(RedisMessageListenerContainer listenerContainer) {
super(listenerContainer);
}
@Override
public void onMessage(Message message, byte[] pattern) {
String expiredKey = message.toString();
log.info("expiredKey========="+expiredKey);
}
4.查询方法中随便加了两个表中的不同id，一个30s,一个27s。
redisUtil.set("UserId"+user.get(0).getId(),user.get(0).getId(),30);
redisUtil.set("UserInfoId"+userInfo.get(0).getId(),userInfo.get(0).getId(),27);
控制台输出：
需要注意的是：
过期监听消息中返回的是，过期的键的key值，是没有返回value的
