Hibernate works quite smothly in karaf 3. In my tutorial
http://www.liquid-reality.de/x/C4DK I describe a complete example.
As you can see it works almost without any quirks. The only special
setup was to declare some special Import-Package statements in the model
bundle to make load time weaving work.
The data sources can now be declared using just a config file in etc
using pax-jdbc including XA transaction wrapping and production level
pooling.
Christian
Am 06.05.2015 um 15:48 schrieb Andrew Phillips:
I have used Hibernate successfully (including Hibernate Search) in an
OSGI / Karaf environment.
If you have some specific questions, i’d be more than happy to help.
I have found that Hibernate has some examples of OSGI implementation
using Karaf. Karaf has the “features” ability to add all the
dependencies, in the right order, for the file you are using. In
fact, i think Karaf now has a built in “hibernate” feature, although i
built my own features to fine tweak the dependencies and usage. Once
Hibernate is available as a service (and the configuration depends on
either you are using native hibernate session factory or JPA entity
manger), you can have your annotated entities classes in a different
OSGI bundle and use them as any other bundle as you describe.
The down side of the current OSGI hibernate setup (which is really
just a “make it work” set up, and newer versions of Hibernate are
promised to make it more OSGI like), is that you need to use the
Hibernate.cfg or .xml file to configure that data source and register
the entity classes.
The examples described in
http://docs.jboss.org/hibernate/orm/5.0/devguide/en-US/html/ch17.html do
a good job getting you started.
You can have your entities in a separate bundle if you wish or in the
same bundle with your session factory singleton.
On May 5, 2015, at 10:43 PM, Jens J Parappallil
<[email protected] <mailto:[email protected]>> wrote:
Hi,
I am planning to integrate hibernate in my project, I have many
bundles which has entity classes present ( and exported ) . I am
planning to have a core bundle which holds the hibernate session
factory etc and manages the persistence stuff.
I am thinking how this works out in an OSGi environment where the
bundles ( having entity classes ) can come and go. The hibernate
session factory is a singleton , to be created ones and used. Can it
wok with annotated entities coming and going ?
This is more of a hibernate question , but any of you guys have
envisioned such a usage pattern and made it work ?
Thanks
Jens
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