在注入实体管理器之前呼叫捆绑激活器

Question

I have a persistence bundle (has a Meta-Persistence ), it also has an Activator class

when deployed into karaf , the container starts processing the persistence unit & mapping files etc, before calling the start method of the Activator

My question is : is there a way to alter this behavior ? having the container call the method first ?

Edit

The reason I need the activator to be called first:

I have some mapped entities that rely on jackson which itself relies on spring , what happens is, when hibernate is loading the entities , it arrives at a home-made class that blocks while no spring context is injected into it. So the bundle is forever on a starting state

So I though a possible solution would be to make use of the Activator to inject the spring context

Thank you

Answer 1

The container (or more precisely Aries JPA) must start processing the persistence unit before the bundle is started.

The reason is that Aries JPA needs to do load time weaving in some cases. This kind of weaving must be done before classes to be weaved are loaded the first time by any bundle. So the only safe time to do this is directly after the bundle is resolved.