- Introduction to JRuby at the university,
- JRuby on Rails at the conference,
- Birds-of-a-Feather (BOF) session on JRuby,
- A quicky on ActiveHibernate.
And, while on the topic of ActiveHibernate, I have added support for lazy loading of entities and support for Hibernate components (aka aggregation in Rails):
class Address
attr_accessor :street
attr_accessor :city
end
class Person
include Hibernate
primary_key_accessor :id, :long
h_component :address,[[:street,:string],[:city,:string]]
end
I'll use the time that's left before JavaPolis to polish (i.e., clean up and extend the tests) the functionality that is in there today.
Anyway, I'm looking forward to meeting the JRuby team in Antwerp.
21 comments:
Hello Johan:
Nice work on ActiveHibernate so far. One of our new products use Rails over JRuby with whole bunch of areas written using Hibernate ORM as well.
Had an interesting thought. Instead of tying ActiveHibernate to specifically Hibernate, if one can use the javax.persistance annotations generate a proxy class, we can change the underlying implementation from hibernate to toplink and other solutions easily. Essentially it would become ActiveJPA of sorts.
Not sure how big a change it would be from your current code base.
Hopefully I want to spend sometime to volunteer patches to ActiveHibernate.
Regards,
Venkat.
Hi Venkat,
the creation of the Hibernate mapping XML is nicely seperated from the Ruby mapping DSL, so plugging in your annotated proxies should be possible without to much problems. I do think, however, that things like second level caching, lazy collection loading, tracking object identity, persistent state, etc. will be much harder when you proxy the IRubyObjects. What I like about the current solution is the simplicity of the Hibernate integration.
But if you can get it working, I would certainly be interested!
Cheers,
Johan.
Hello Johan:
Thanks for the response and thoughts.
Regards,
Venkat.
Johan,
Been meaning to contact you for awhile. How's Active Hibernate going? Would be very interested in talking with you about it. can you pop me an email?
bburke@redhat.com
Johan,
Is ActiveHibernate still alive?
Mark
Mark,
I guess ActiveHibernate is pretty much dead... Of course the code is still there in case anyone wants to continue with this.
The problem is that with each new version of JRuby (and, to a less extend, Hibernate) the AH code breaks because it relies on the internal implementations of the frameworks.
Johan.
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