[Feature Request] 定时任务多service实例
## Background
项目有个需求是在定时任务里循环调用service去更改状态，但是，貌似定时任务调用的service实例都是同一个，导致一些service内的全局变量有点混乱，怎样才能实现和请求时那样保证每次service都是一个新的实例。

![image](https://user-images.githubusercontent.com/47513562/106259502-4dfdf600-625a-11eb-93fd-8a8f03d2b031.png)


![image](https://user-images.githubusercontent.com/47513562/106259915-cb296b00-625a-11eb-9861-150bd30e2c16.png)



## Proposal
Describe the solution you'd like, better to provide some pseudo code.

## Additional context
Add any other context or screenshots about the feature request here.
