您应该将 @Transactional
放在 DAO
类和/或其方法中,还是最好注释使用 DAO 对象调用的服务类?或者注释两个层"有意义吗?
Should you place the @Transactional
in the DAO
classes and/or their methods or is it better to annotate the Service classes which are calling using the DAO objects? Or does it make sense to annotate both "layers"?
我认为事务属于服务层.它了解工作单元和用例.如果您将多个 DAO 注入到需要在单个事务中协同工作的服务中,那么这是正确的答案.
I think transactions belong on the service layer. It's the one that knows about units of work and use cases. It's the right answer if you have several DAOs injected into a service that need to work together in a single transaction.
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