Re: [Php-java-bridge-users] Classpath for external lib in JavaBridge app

Hi,


> In my case we have many php applications on one server using different
> versions of Jasper Reports Libraries.

The example JavaBridge.war from the php-java-bridge_documentation.zip
download contains the OSGI framework. It uses separate classloaders,
similar to our deprecated java_require() feature, to allow loading
different library versions at a time. But since it has the same
issues, I cannot recomment it either. For example we ran into several
class-loading issues while preparing the BIRT report example.


> loading correct libraries. In this case can I have two JavaBridge
> applications running in my Tomcat server so that the libraries are not
> messed up?

Yes. Tomcat separates all web applications using different class
loaders. You may run into PermGenSpace OutOfMemoryErrors and some
libraries should not be loaded this way; see
http://tomcat.apache.org/tomcat-5.5-doc/RELEASE-NOTES.txt section "Web
application reloading and static fields in shared libraries". But if
you don't load too many libraries and if the library authors have
payed attention [1], this will work.

Regards,
Jost Bökemeier

[1] log4j contained such a bug:
http://marc.info/?l=log4j-user&m=109578379927175&w=2