Re: [Springframework-developer] Hibernate3 vs Hibernate2

[Mark St G. <stg...@ca...>]

Yeah Alex,

For me (as an Eclipse user) it was just an exercise in CTRL-Shift-O to
reference the new APIs...   and to also change
the applicationContext XML to reference the new LocalSessionFactoryBean...

Note: I was not using Annotations at this point on this current project...
so it was pretty straightforward

Cheers
Mark


                                                                           
             Colin Sampaleanu                                              
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                                       Re: [Springframework-developer]     
                                       Hibernate3 vs Hibernate2            
             03/23/2005 09:10                                              
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Alexandru Popescu wrote:

>Hi!
>
>I saw in the ML that the Hibernate3 support is in CVS HEAD already. Can
you point me to the main
>changes provided in the Spring support for Hibernate3 vs Hibernate2? (i
expected there where changes
>required by the changes (from check to unchecked) exceptions in Hibernate3
and for supporting the
>new features, but it will be more easy for me to have a Spring expert
opinion on this).
>
>
Alex,

Juergen did the actual conversion, so is the final authority, but the
port is mostly a straight port of the existing classes to reflect the
new packages used by Hibernate 3. One difference in Hibernate 3 is that
Hibernate 3 does throw unchecked exceptions instead of checked
exceptions, but Spring users should actually be insulated from that, as
they would have normally be catching Spring's own unchcked
DataAccessExceptionHierarchy. Spring's HibernateTemplate class for
Hibernate v3 does add the important methods added to v3's Session, such
as the 'load()' variants which take an entityName, e.g.:
  http://www.hibernate.org/hib_docs/v3/api/

Generally, you should be able to take existing Spring-based code using
the Hibernate 2 support, and convert it to using the Hibernate 3
support, by just changing all org.springframework.hibernate.* package
names to org.springframework.hibernate3.*. Any breakage (not that you
should generally expect any) should generally be from changes in
Hibernate itself between versions, and not the Spring support code. Note
that Hibernate has actually deprecated a few methods on the Session
interface (they are only available now as part of the
org.hibernate.classic.Session interface. I believe HibernateTemplate has
also removed some of the methods which were directly exposed and are now
deprecated.

Colin



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