Ajay, Great question. The loader will pull OpenEJB and the beans into the system classpath, therefore the Servlets can see the EJBs but not vice versa. So, if the two of them share any libraries, the libraries will have to be in the ejb's jar or in OpenEJB's lib directory.
This style of integrating OpenEJB into Tomcat is just one of many that will be supported, but is the only possible approach for 0.8.3. OpenEJB has custom implementations of many of the pluggable aspects of the Java Virtual Machine, such as a custom java.net.URLStreamHandler. The issue is that the VM only looks for these in the system classloader and cannot see them if they are in any of the Tomcat classloaders. OpenEJB obviously relies on these custom implementations and without them, many things do not work. We are already working on OpenEJB + Tomcat integration that uses the various Tomcat classloaders, but such a thing is many times harder as it will require us to work around classloading limitations of the VM. For now, the integration will work perfectly as long as all common or shared libraries are in the openejb-0.8.3/lib directory or in the ejb jar. -David > -----Original Message----- > From: Ajay Upadhyaya [mailto:[EMAIL PROTECTED]] > Sent: Friday, October 11, 2002 12:30 PM > To: David Blevins > Subject: RE: [OpenEJB-user] Tomcat & OpenEJB instructions and tools > > > Can you explain about where the ejb classes will be loaded > w.r.t. Tomcat hierarchical classloaders. If there are other > classes needed by my EJBs, will they be visible to the EJBs > if I put them in CATALINA_HOME/common/lib and not in the EJB jar file. > > Regards, > Ajay > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of > David Blevins > Sent: Wednesday, October 09, 2002 7:30 PM > To: [EMAIL PROTECTED] > Subject: [OpenEJB-user] Tomcat & OpenEJB instructions and tools > > > All, > > Give the following instructions and tools a try for an easy > Tomcat and OpenEJB integration. This will setup Tomcat to > use the OpenEJB Local Server. Basically, you copy the > attached openejb_loader-0.8.3.jar into > CATALINA_HOME/common/lib directory of a fresh Tomcat install. > Then you set the JAVA_OPTS variable to > "-Dopenejb.home=$OPENEJB_HOME". > > That's it. Pretty much just two steps. > > The instructions are with JDK 1.3.1, Tomcat 4.1.12, OpenEJB > 0.8.3, Windows 2000 with Cygwin 1.3.12. > > Let us know how it goes. I'd really like to workout any > issues now so we can release it with 0.8.4 and know that it > works well for everyone with all platforms, Tomcat versions, and JDKs. > > -David > ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ http://OpenEJB.sf.net OpenEJB-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/openejb-user
