Re: [ajug-members]: Open Source JDO?

[Angus Berry <angus.berry@elken.com>]

I'm using OJB on one project currently and like it, however it's JDO is
a described as a 'reference' implementation, so I'm using the OQL
interface (and their native PB if necessary). For JDO they currently
piggy back off Sun's reference implementation, which raises questions of
licensing and the solution was also quoted as not being scalable by one
of the developers. They do have some native JDO already in-place, but
it's undocumented. The developer I conversed with was actively working
on native JDO as OJB 1.0 is on it's final release candidate.

When choosing a JDO tool, for me, one thing that Patrick said carries a
lot of weight. Using JDO 'allows you to differ descisions'... i.e. if
your persistence layer is JDO compliant then it can swapped out at
production time to suit the application's requirements... hopefully this
isn't in the same way that Java is gets described as 'write once, test
everywhere' :-)

I'd love to hear of anyone's experiences with any of the open source JDO
too.

On Mon, 2004-03-29 at 09:12, Dan Glauser wrote:
> Good Morning All,
> 
> After Patrick's presentation on JDO and hitting the limitations of
> Entity Beans in my last project I'm considering JDO for persistence in
> my next project.  There is a company mandate that we use only open
> source components so I'm trying to evaluate the open source JDO
> implementations.  So far I've found:
> 
> Apache OJB	http://db.apache.org/ojb/index.html
> TJDO		http://tjdo.sourceforge.net/index.html
> XORM		http://xorm.sourceforge.net/
> JORM		http://jorm.objectweb.org/index.html
> 
> Does anyone have experience with any of these?
> Any recomendations?
> 
> Thanks,