Sorry, just noticed that you mentioned the
...basedb.util.JarClassLoader, not a regular Java class loader as I
initially thought.
On 01/02/11 13:17, Pawel Sztromwasser wrote:
Thanks for a quick reply. I really wanted to avoid selecting jars and so
on since BASE has over 50 of them, and maven downloads over 60 for my
plugin. Lots of manual work that needs to be done every time BASE is
upgraded.
I will try to change the Application class as you suggested. I have
already located the place which needs a fix, but was unsure of playing
so close to the core of the application. What about using the
net.sf.basedb.util.JarClassLoader, as regular plugins do?
I will post a patch when ready and tested.
Cheers,
Pawel
On 01/02/11 13:03, Nicklas Nordborg wrote:
On 2011-02-01 11:29, Pawel Sztromwasser wrote:s
Hi,
I am working on an external authentication plugin for BASE that will use
an STS Web service to authenticate users. The plugin uses a bunch of
external jars for WS communication, but with different versions then
BASE. I was hoping for the same classloading mechanism as for regular
plugins (separate classloaders), but it looks like external
authentication plugins uses the default classloader of the webapp. Could
this be changed? How else could I install my plugin, without messing
with BASE's jars?
That part of BASE is not very pluginified. I am not aware of any real
case that uses external authentication so it would be very interesting
to see if you succeed.
It's quite common that there are dependencies to different versions of
3rd-party JAR files, but it usually works if the latest one is used. But
of course, it may not work if the API has changed in an incompatible way.
If you can't get it to work by clever selection of JAR files, then you
might have to modify the Application.getAuthenticator() method so that
it uses a different class loader. It shouldn't be too difficult. It
could for example pick up a JAR path from the base.config file and then
use the net.sf.basedb.util.JarClassLoader.getInstance(path) to create a
class loader. Dependencies need to be listed in the MANIFEST.MF in the
same way as for plug-ins. There is a short notice about this at
http://base.thep.lu.se/chrome/site/latest/html/developerdoc/plugin_developer/plugin_developer.organize.html
and
http://base.thep.lu.se/chrome/site/latest/api/net/sf/basedb/util/JarClassLoader.html
As always, patches are welcome :)
/Nicklas
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