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From Leszek Gawron <lgaw...@mobilebox.pl>
Subject Re: Classloader changes
Date Thu, 13 Oct 2005 10:40:52 GMT
Carsten Ziegeler wrote:
> Reinhard Poetz wrote:
> 
>>As described in the comment above, classes in [block]/COB-INF/classes are added 
>>to the classpath. The information, which blocks are added, is read out from 
>>wiring.xml.
>>
>>While doing this, I've (hopefully) cleaned up our classloading abit as I've 
>>moved all the code into CoreUtil. I've tested OSGi and the per sitemap 
>>classloader and both work as expected. Hopefully others can verify, expecially 
>>if you can test with other servlet containers than Jetty.
>>
>>If others are interested in helping us getting blocks (+ binary distributions) 
>>sooner and want to do more than just talking, have a look at the open tasks 
>>above :-p
>>
> 
> I hope that we can remove some of the old class loader/class path
> handling as well.
> 
> In 2.1.x we had a boolean parameter (in web.xml) which could be used to
> set the Cocoon class loader (the one used to instantiate Cocoon) as the
> thread context class loader.
> In addition, we could define extra class paths in web.xml (containing
> directories/jars I think) which were added to the class path as well and
> finally we have parameters to force load classes (e.g. for jdbc drivers).
> 
> With real blocks I think we should always add our class loader as the
> thread context CL (this is the current implementation) and we should
> forget about defining additional class paths.
> I'm not sure about the force loading stuff.
> 
> In addition I think we should always use the paranoid class loader to
> avoid class loading problems. A common problem are either Xalan and
> Xerces where you forgot to put the latest version (used by Cocoon) into
> the endorsed lib. Or if the application server uses his own version of
> let's say commons-logging/log4j and you want to use a different one in
> Cocoon.
Does it mean I will be forced to have xalan/xerces in cocoon's 
web-inf/lib directory? Right now the only place is jetty/lib/endorsed.

-- 
Leszek Gawron                                      lgawron@mobilebox.pl
IT Manager                                         MobileBox sp. z o.o.
+48 (61) 855 06 67                              http://www.mobilebox.pl
mobile: +48 (501) 720 812                       fax: +48 (61) 853 29 65

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