Hello,
Currently I'm developing an application that needs to access more than one
database. It has objects persisted in two databases.
I'm using Spring + JPA + Struts. I've added to the applicationContext.xml a
new datasource, new persistence unit manager and a new entity manager
factory.
My idea was to extend GenericDaoJpa and inject a new entity manager
overriding method 'setEntityManager'.
public class GenericDaoJpa <T, PK extends Serializable> implements
GenericDao<T, PK> {
............
@PersistenceContext(unitName="ApplicationEntityManager")
public void setEntityManager(EntityManager entityManager) {
this.entityManager = entityManager;
}
...........
}
public class OtherGenericDaoJpa extends GenericDaoJpa {
@Override
@PersistenceContext(unitName="otherunitname")
public void setEntityManager(EntityManager entityManager) {
super.setEntityManager(entityManager);
}
}
I'm using PersistenceAnnotationBeanPostProcessor to inject this
dependencies. The things is that this class inpects the first class,
OtherGenericDaoJpa, and gets the annotation. Then, it inpects the parent
class, GenericDaoJpa, and gets the other annotation.
After this, it injects the dependencies, first with OtherGenericDaoJpa and
then with GenericDaoJpa, setting at the end the 'ApplicationEntityManager'
entity manager instead of the new one.
I don't know if I'm choosing the wrong way to get what I want of if there is
a limitation in the PersistenceAnnotationBeanPostProcessor. From my reduced
point of view the processor should not take into account methods of parent
classes if they are override by another child class or maybe it should
inject dependencies in reverse order (from parent to childs).
How can I solve this? Should I change the
PersistenceAnnotationBeanPostProcessor or is there any other way?
Thanks,
Jorge
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