Re: Dynamic classpaths

[John Woolsey]

Hey. I am writing my own J2EE engine from scratch to learn more about 
them. I am trying to keep the code readable and easy to use. I may turn 
it into the Minix of J2EE servers when I am done. My next task was 
adding deployed jars to the classpath. I managed to get help from a 
friend when he said look into class loaders. I have some basic code to 
load classes out of jars, but I have yet to test it. At this point I am 
refactoring the code to deploy beans without extracting them. It seems a 
more logical route.

                                                                        
                                                              - bfn - JAW

Gianny Damour wrote:
On 25/08/2004 2:45 AM, John Woolsey wrote:
I am trying to deploy my bean and I need to add the jar to the 
classpath (I know rewrite my classloader) so that I can see classes 
and interfaces in the jar. Just wondering for a good spot to look for 
that.

                                             - thanx - JAW
 

Hi John,
I do not understand exactly what you are trying to achieve. Yet, if 
you are trying to deploy (Enterprise Java)bean, then you just have to 
package them as you were used to do it. Having said that, Geronimo is 
not yet able to handle Class-Path entries defined in Manifest files. 
Hence, if you are trying to deploy an (Enterprise Java)bean using this 
mechanism, then you may face some ClassNotFoundException.

Could you please provide more details on your needs?
FYI, Dain speaks of Geronimo's class-loading strategy there:
http://www.theserverside.com/talks/videos/DainSundstrom/dsl/interview.html 

I think that you should check it out to understand what it buys you as 
an end-user.

Thanks,
Gianny