All,
I've got a bit of a newbie Wicket question involving Spring, Hibernate
and transactions.
The question that I can't seem to find an answer to;
Can a view be a created/injected/aop'd like a spring bean so that it
honours @Transactional methods for hibernate?
An example;
public class HomePage extends WebPage {
@SpringBean // this is working fine
private SessionFactory sessionFactory;
public HomePage(final PageParameters parameters) {
this.init();
}
@Transactional // this is not working
public void init() {
Criteria criteria =
sessionFactory.getCurrentSession().createCriteria(MyEntity.class);
List<MyEntity> myEntities = criteria.list();
for( MyEntity myEntity : myEntities ) {
// where subEntities is a lazy collection
for( SubEntity subEntity : myEntity.getSubEntities() )
{
// ...
}
}
}
}
I've been reading Wicket In Action book, various places on the net and
of course, emails on the subject on this list and this particular
tutorial;
http://wicketinaction.com/2009/06/wicketspringhibernate-configuration/
And I'm still wondering, is this something that is actually possible? I
could full understand that it wouldn't be - i.e. that the injector only
works for Spring injection dependency and not AOP or anything else. So
you inject your dependencies - and they have transaction support etc.
But that means I'll be having to force fetching of lazily fetched
children from outside the views themselves, which is obviously very
painful. It would be so much easier to have transaction support in the
view itself and not have to delegate.
Any help would be greatly appreciated.
The error message I'm receiving is;
Caused by: org.hibernate.HibernateException: createCriteria is not valid
without active transaction
at
org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWra
pper.invoke(ThreadLocalSessionContext.java:338)
at $Proxy15.createCriteria(Unknown Source)
at com.tenthart.tacs.testpres.HomePage.init(HomePage.java:39)
at com.tenthart.tacs.testpres.HomePage.<init>(HomePage.java:28)
... 34 more
Cheers,
Col
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