Klaus

是否要以使用时间轮的方式来实现，减少Ticker数量对CPU的压力？

still remember the pain of [etcd](https://github.com/etcd-io/etcd/issues/12124). Hope this change would not cause another disaster.

I don't think it's a good design. Why sentinel not expose callback, hooks or adapter interface definition. Thus any framework(like beego, gin, martini,etc.) can integrate sentinel.

Any updates?