On Jul 8, 2005, at 2:05 PM, David Jencks wrote:
On Jul 8, 2005, at 1:51 PM, Kenneth Tam wrote:
<big snip>
When you say "only used in the builders", do you mean "only used at
build time"? (I'm unclear on what the term "builders" means in this
context). This suggests that the runtime system never loads
xmlbeans-generated schema classes, which strikes me as odd.. for
example, aren't J2EE DDs manipulated using generated xmlbeans schema
classes?
The builders convert various input, such as J2EE artifacts + geronimo
plans, to stored configurations. After this conversion, no xml is
present so no xml processing is needed. For the running geronimo
server, the builders are in a separate, optional, configuration
(org/apache/geronimo/RuntimeDeployer, plan is in
j2ee-runtime-deployer-plan.xml). Applications normally have
org/apache/geronimo/Server as their parent configuration/classloader.
We should be able to move the xmlbeans dependency into the
RuntimeDeployer configuration, leaving the app's classloader
xmlbeans-free.
I'm going to experiment with this a bit this afternoon.
For once, all went smoothly and xmlbeans are now a normal dependency of
the builders, not something in the root classloader. So, you should be
able to use any version of xmlbeans in an app without interference.
This should be in the soon-to-be-released M4 as well as svn. Please
let us know how it works.
thanks
david jencks
(excuse me if this is all sounding totally clueless, I've just started
looking at the Geronimo codebase)
If we can
maintain this separation there should be no problem in using any
version of xmlbeans in an application, since the builder classloaders
using xmlbeans and the application classloaders using xmlbeans would
be
unrelated.
If you want to help sort this out, your work would be extremely
welcome.
My main interest is in getting to the point where applications can use
xmlbeans v2. If it turns out that this means geronimo's "native"
usage of xmlbeans also needs to be upgraded, that would be
unfortunate, but not surprising -- besides any issues in Geronimo, I
am not sure what limitations xmlbeans itself has wrt concurrent usage
of v1 and v2.
I doubt it would work: I believe most of the classes have the same
names.
thanks
david jencks
thanks,
ken
