Dynamic Class loading

[brilleaben]

Hello,


Having read through lots of posts, documents and pages found on Google and still having a, to me, strange problem, I turn to the gurus on jboss.org ...

Situation: I start my main application from within jboss. My application will generate dynamic java classes outside the jboss directories.
When the classes needs to be loaded the class loading fails with a "Class Not Found Exception".
However, if I restart jboss and loads the previously generated classes everything runs smoothly.

In the jboss-service.xml for the .sar I have a line:



My classes are in a com.hp package and their name starts with Dyn{autogen-id}. The {autogen-id} is a autogenerated name based on a md5 sum of some of the properties of the class (path, name etc).

A full path to a class would be:

c:\HP\myapp\classes\com\hp\DynXXX.class

To find/load the class I use the following:

class = Thread.currentThread().getContextClassLoader().loadClass("com.hp.DynXXX");

So ... my question is: how do I "hot deploy" a class outside of the jboss directory hierarchy?


Kind regards,
Brian

[genman]

I don't know if I can be a help...but I have some ideas.

There is a "classpath extension service" which can add additional .jar files and ... perhaps class directories to an existing loader repository.

In the JMX console, every JBoss classloader has an MBean name, so for your .ear or scoped .sar or whatever, you can adjust the classpath using this service.

http://fisheye.jboss.com/browse/JBoss/jboss-system/src/main/org/jboss/deployment/ClasspathExtension.java

[brilleaben]

Hi - thanks for your answer. I did somewhat solve the problem myself. I used the URLClassLoader to load the class. I am not sure it is the best way to do it, but it works for me :-)