redis 检查key expire事件

refs:

https://stackoverflow.com/questions/35699811/subscribing-to-redis-expire-events-in-c-sharp-driver

https://redis.io/topics/notifications

1）config中使能 key space event watch；使能键观察，使能事件观察；

config set notify-keyspace-events KEx

2)sub相关键值

redis-cli --csv psubscribe '__keyspace@0__:dtu:*'

3）在service stack中，设置如下

注意expireKey此处是事件expire,ch中是keyPre和相应的键信息

            //config set notify-keyspace-events KEx            string EXPIRED_KEYS_CHANNEL = $"__keyspace@{redisConfigInfo.DefaultDb}__:{KeyPre}*";            using (var client = RedisManager.GetClient())            {                using (var subscription = client.CreateSubscription())                {                    subscription.OnMessage += (ch, expiredKey) =>                    {                        string ch_pre = EXPIRED_KEYS_CHANNEL.Replace("*","");                        string bianhao = ch.Replace(ch_pre,"");                        OnExpired(bianhao);                    };                    subscription.SubscribeToChannelsMatching(EXPIRED_KEYS_CHANNEL);                }            }