@Transactional does not work on method level

Question

I have a question about Spring 3.2.3 @Transactional annotation. My Service class looks like this:

@Service @Transactional
class InventoryDisclosureBO {

@Aut         


        

Answer 1

This is related to how spring generates the transactional proxies.

In the case where you have @Transactional at the class level, when you call InventoryDisclosureBO.processDisclosureData(), in fact, you're calling a Spring proxy that starts the transaction, and then calls the real implementation.

If you only have @Transaction in persis(), spring doesn't start a transaction when you call InventoryDisclosureBO.processDisclosureData(), and then it cannot detect that you've called InventoryDisclosureBO.persist()

So Spring basically ignores the annotation on persist, because it cannot add the transactional proxy.

As a rule of thumb, the @Transactional annotation should be on a public method, and hopefully quite high in the call hierarchy (otherwise each persist would end up creating a new transaction)

You might find more information on this other SO question: Method Interceptor on private methods (any non-public methods behave in the same way)