Hi Avi,
Here's an example that might help:
http://openejb.apache.org/3.0/ejb-21-compatibility-example.html
This is an EJB 3.0 Stateful bean that has both EJB 2.1 and EJB 3.0
style interfaces. It's in the examples zip as "component-interfaces".
-David
On Aug 5, 2009, at 1:58 AM, Avi Grossbard wrote:
Thanks Jon.
your answer is very promising, still I think it would be helpful if
you can
post a simple EJB2.x example.
Avi
Jonathan Gallimore-2 wrote:
Hi Avi,
I don't think we have a good example of showing EJB 2.1, but I
could make
a
2.1 version of our simple-stateless example if that would be helpful.
I have run some EJB 2.1 projects on OpenEJB 3 at work not too long
ago (we
migrated to EJB 3 for all our projects about 3-4 months ago), so
everything
should work with EJB 2.1 - I'm not aware of any problems.
Deployment works
in the same way for both EJB 2.1 and EJB 3 applications.
In terms of your client code, looking up an EJB 2.1 bean, you'll
need to
lookup the home interface, use PortableRemoteObject.narrow to cast
it, and
call the create() method on the home interface.
With EJB 3, you can still use the home interface if you like, or if
you
prefer, you can just lookup the business interface of your bean.
Hope that helps.
Jon
PS. If you're interested in migrating your app to EJB 3, our Eclipse
plugin
(http://openejb.apache.org/openejb-eclipse-plugin.html) has a
wizard which
might help with this.
On Sun, Aug 2, 2009 at 4:53 PM, Avi Grossbard
<[email protected]>wrote:
I find in the OpenEjb homepage the following:
"Supports EJB 3.0, 2.1, 2.0, 1.1 in all modes; embedded,
standalone or
otherwise"
However I didn't find any example (both client code & remote EJB)
that
demonstrates this.
1. is there code examples that shows how a client of openejb 3.1
can use
remote EJB2.x?
2. Can client code can be coded in a uniform & consistent manner
regardless
the version of the remote EJB?
3. If the answer to 2 is affirmative, could you possibly provide/
point to
a
code example that demonstrate it?
Thanks,
Avi
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