Well for the JNI it was necessary as it is like a dll in windows and cannot be loaded more than once - which Tomcat would try to do - 1 for each instance.
Mike. -----Original Message----- From: Tim Funk [mailto:[EMAIL PROTECTED] Sent: 04 November 2005 12:40 To: Tomcat Users List Subject: Re: Load class from different web app Placing classes jdk/jre/lib/ext puts them into the system classloader. This opens a whole class of class not found errors and errors related to tomcat not reloading classes. (As well as memory leaks due to Classloaders not being freed) -Tim Michael Forster wrote: > That is not strictly true, We had an application at work that used JNI and > was part of a Database access library as well as accessing things like the > Machines Hostmac address. > > We could not run it from the Tomcat area and had to put it into a jar file > and put the jar file into the JVM jdk/jre/lib/ext dir and then it worked > fine as any classes / libraries in that dir are loaded by the JVM meaning > they are always available - This is also where we put the JDBC driver jar. > > Mike. > > -----Original Message----- > From: Tim Funk [mailto:[EMAIL PROTECTED] > Sent: 04 November 2005 11:32 > To: Tomcat Users List > Subject: Re: Load class from different web app > > > You are violating the servlet spec. Do not pass go, do not collect $200. > > Classes for a webapp need to be in WEB-INF/classes and WEB-INF/lib. Tomcat > does allow for webapps to share classes via the $CATALINA_HOME/shared and > $CATALINA_HOME/common directories but you'll need to see the classloader > docs > on any restrictions. > > -Tim > > Steven Nakhla wrote: > > >>I'm writing a web application (a portal app, to be specific) that needs to >>be able to load a class (using Class.forName(...)) that was deployed in a >>different web application from the one I am developing. I've deployed the >>target web app containing the class I want to load, but whenever I call >>Class.forName(), I get a "java.lang.ClassNotFoundException". Is there >>anything special I need to do if I want to load this class? It appears it > > is > >>a classloader issue, but I don't know enough to determine what the problem >>is. Any help is greatly appreciated! >> >>Steve Nakhla >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.362 / Virus Database: 267.12.8/161 - Release Date: 03/11/2005 > > > > --------------------------------------------------------------------- > 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] -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.12.8/161 - Release Date: 03/11/2005 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]