One option is to place your validation logic in a service layer.
一个选择就是把验证代码放到“Service”层中。
One thing we certainly need in the near term is some validation logic.
我们近期肯定需要的一件事就是某种验证逻辑。
In concept, application-level validation is really business logic validation.
在概念上，应用程序级验证实际上是业务逻辑验证。
If validation passes, your code should proceed with the callback event logic.
如果验证通过，则代码将继续使用回调事件逻辑。
If validation passes, your code should proceed with the callback event logic.
如果验证通过，则代码将继续使用回调事件逻辑。
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