I understand that you resolved the issue, but I am not sure that this
is the best approach in the long run. I have some suggestions for
different approaches too, but these are not good for the long run
either.
1. Since the default class path for a bundle is ".", you should be
able to load your plugin class directly from Bundle.loadClass(), I
would imagine.
2. You could create a special installer that you used to install your
plugin JAR file instead of doing it directly with
BundleContext.installBundle(). This special installer could
automatically run them plugin JARs through BND.
Long run, you probably want to migrate the plugins to bundles in some
fashion.
-> richard
On Feb 21, 2008, at 9:40 PM, Mike Smoot wrote:
Hi,
I'm working on migrating an existing swing application (http://cytoscape.org
)
to OSGi using Felix. With the help of bnd, I've gotten everything
running
about how it should, with the exception of our legacy plugin
mechanism. The
way the old plugin mechanism works is that a plugin jar file (but
not a
bundle) is read and we then call ClassLoader.loadClass() on a class
found in
the jar file. The problem is that with Felix I get a
NoClassDefFoundError
when I try to load the class. I'm assuming this is because none of
the
packages defined in the plugin jar are found by Felix since the
plugin jars
aren't bundles or loaded as such.
Now, I've managed to work around this problem in two cases. First
is using
Equinox, which I'm not terribly keen on using. Second is by running
bnd on
each plugin jar, loading them as bundles, jumping through a few
hoops to get
the correct ClassLoader, and then loading the class. The problem
with the
second approach is that I have to wrap all plugins before anything
will
work. I'd very much like to avoid this requirement (for now)
because this
will only work with plugins that I have and not those developed by
users.
Can anyone provide any guidance on loading classes that aren't part of
bundles? Is this possible with Felix? I apologize if this is a bit
vague,
but I'm still very new to OSGi.
thanks,
Mike
--
____________________________________________________________
Michael Smoot, Ph.D. Bioengineering Department
tel: 858-822-4756 University of California San Diego
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