JBoss AOP works in two ways.  Either you precompile your Java .class files to push in 
the AOP stuff, or you set JBoss AOP up so that it does the bytecode transformations at 
runtime when the class is loaded.  Load-time transformation requires hooks into the 
classloader.  

With JDK 1.4, we originally had to OWN the classloader.  Unfortunately, JSPs in tomcat 
are loaded by a different classloader I think than the JBoss classloader (haven't 
tried it yet).

Fortunately, JDK 5.0 provides a way to hook in your own transformers via the 
java.lang.instrument package.

Kevin Conner recently committed something to CVS that can transform 
java.lang.classloader so that it can provide hooks for transformation.  We should be 
releasing JBoss AOP 1.0 this week with directions on how to use this.

Now, on to the other part of your question....

You'll have to give me more insight on what your goals are with your security 
framework, then maybe I can suggest some ideas.

Bill


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