Great annotation

I hope you have a deeper understanding of annotation processing now. I have to say it once again: Annotation processing is a very powerful tool and helps reducing writing boiler plate code. I also want to mention that with annotation processors you can do much more complex things than I show in this simple factory sample, for example type erasure on Generics, because annotation processing happens before type erasure. As you have seen there are two common problems you have to deal when writing: First, if you want to use ElementUtils, TypeUtils and Messager in other classes then you have to pass them as parameters somehow. In AnnotatedAdapter , one of my annotation processors for android, I tried to solve that problem with Dagger (Dependency Injection). It feels a little bit to much overhead for such a simple processor, however it has worked well. The second thing you have to deal is you have to make “queries” for Elements . As I said before, working with elements can be seen as parsing XML or HTML. For HTML you can use jQuery. Something similar to jQuery for annotation processing would be really awesome. Please comment below if you know any similar library.

Some of the other answers imply that using two transaction managers is in some way wrong; however, Spring's XML configuration allows for using multiple transaction managers as stated in the online documentation (below). Unfortunately, there does not seem to be a way to make the @EnableTransactionManagement annotation work in a similar manner. As a result, I simply use an @ImportResource annotation to load an XML file that includes the <tx:annotation-driven/> line. This allows you to get a Java configuration for most things but still make use of @Transactional with an optional Transaction Manager qualifier.

Great annotation

great annotation


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