哪里@Transactional注释属于？ [英] Where does the @Transactional annotation belong?
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问题描述
如果您将 @Transactional 在 DAO 类和/或它们的方法或者是更好的注释它使用DAO对象调用服务类？或者它是有意义的注释都层？
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"?
推荐答案
我觉得交易服务层上的归属。它是知道的工作环境和使用情况的单位之一。这是正确的答案，如果你有几个DAO的注入需要在单个事务中一起工作的服务。
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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