I am working on an aspect oriented solution to providing forensics on
class loading within Tomcat. The advice, aspect, and aop.xml are
packaged in a jar which is loaded using -Xbootclasspath\a: (appends to
the BCL path). I'm having problems with the pointcut and advice
expressions matching the need within classloader behavior.
method is described here
What I need is a call pointcut that returns Class from ClassLoader+
pointcut source(String s, ClassLoader l) :
target(ClassLoader+) &&
target(l) &&
args(s) &&
call(Class loadClass(String));
The advice I'm having problem with is when an ClassNotFoundException
(cnfe) is thrown, I'm only interested in the cases where delegation
wasn't involved. That is if a child delegates to the parent, a cnfe
signals to the child to load if able. If the leaf descendant throws
cnfe, it means "really, class not found". So is this type of expression
normally best placed in the poincut, or the advice?
after(String s, ClassLoader l) throwing (ClassNotFoundException e) :
source(s, l) {
// do something here...
}
isn't selective enough, as I'm getting many cnfe's related to delegates
responding to children to signal load should be attempted. I played
with cflow expressions but couldn't seem to come up with the proper
invocation for the compiler.
Any help greatly appreciated.
CW
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