Hi, Am Mittwoch, den 19.01.2011, 07:01 +0000 schrieb [email protected]: > Just me two cents. > When karaf will be capable to deploy multiple artifacts as applications > (apache aries applications) or something like that it can use eclipse > virgo's par approach. > Here is the link: > http://www.eclipse.org/virgo/documentation/virgo-documentation-2.1.0.RELEASE/docs/virgo-programmer-guide/html/ch04s02.html > Quotation: The artifacts of a PAR have their exported packages imported by > the synthetic context bundle which is used for thread context class > loading. So, for example, hibernate will be able to load classes of any of > the exported packages of the artifacts in a PAR file using Class.forName()
Hmm, probably *not* Class.forName() because this exact method is the cause of the issues with Equinox' Thread Context ClassLoader support (see [1]). Always use ClassLoader.loadClass(String).... Regards Felix [1] http://blog.bjhargrave.com/2007/09/classforname-caches-defined-class-in.html > (or equivalent). > Moreover PAR applications have some more useful features. > > > Best Regards, > Sergey > > > > Guillaume Nodet <[email protected]> > 19.01.2011 00:07 > Please respond to > [email protected] > > > To > [email protected] > cc > > Subject > Re: Can the thread context classloader issue be solved at all? > > > > > > > As Richard said, there's no easy way to solve the problem. What we've > done > in Karaf / Servicemix / Camel where needed is that when using a library > that > require a TCCL to be set for finding classes or resources, we set it > locally > before calling that library. > A cleaner API would be to actually pass a classloader directly > (JaxbContext > does that for example IIRC), but it's basically the same: the caller needs > to build / find the classloader, so it does not really change anything. > > On Tue, Jan 18, 2011 at 21:35, boday <[email protected]> > wrote: > > > > > This remains a common/widespread issue and a cumbersome work around. Is > > there an alternative to this approach? Has this issue been solved in > > Felix/Karaf or is it simply not possible to at the container level? > > > > I've read about several different approaches to this including Context > > Finder, Buddy Policy, etc. > > > > here are a few references that I found... > > > > http://wiki.eclipse.org/Context_Class_Loader_Enhancements (for equinox) > > > > > http://stackoverflow.com/questions/2198928/better-handling-of-thread-context-classloader-in-osgi > > > (no responses) > > > > If there is a more definitive explanation of the issue and options, > please > > point me to it. > > > > thanks... > > > > ----- > > ___________________________________ > > Ben - Senior Consultant > > using AMQ 5.3/Smx 4.2/Camel 2.2 > > -- > > View this message in context: > > > http://old.nabble.com/Can-the-thread-context-classloader-issue-be-solved-at-all--tp28260809p30704054.html > > > Sent from the Apache Felix - Users mailing list archive at Nabble.com. > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] > > > > > > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
