[wildfly-dev] How to put AspectJ aspects on the classpath to advise core classes in Wildfly?

[Eric B]

I'm trying to use AspectJ to advise some core classes in Wildfly/undertow.
Specifically, I'm trying to advise some of the Undertow HttpSession methods
to get some more detailed logging when Sessions are created/expire/etc.

I've added AspectJ as a -javaagent which is launched on startup of
Wildfly.  I had to follow some of the steps listed at:
https://github.com/ChienChingLee/How-to-launch-Wildfly-9.0-with-AspectJ-1.8-LTW.
But it works; I can see that the AJ weaver is loaded and present.

My problem now is that I don't know where to put my jar of aspects for it
to be loaded/visible by the weaver for all modules.  I've managed to get it
to work by modifying the io.undertow.servlet module, adding my jar in the
folder and modifying the module.xml, but that only advises the
io.undertow.servlet.* classes.  And it seems like quite an ugly hack to get
to that.

I tried creating an independent module for it, and declaring it as a global
module in my standalone.xml, but that didn't seem to work.  Nor did
modifying the servlet module.xml and specifying my module as a dependency.

I tried to add it to the startup parameters in the standalone.conf file,
specifying it as -classpath path/to/myaspect.jar, but that only advised the
startup WF (org.jboss) classes and none of the modules.

At the moment, I'm looking to advise any implementation of
javax.servlet.http.HttpSession.invalidate().  In AJ language, the pointcut
is simple: execution(* javax.servlet.http.HttpSession+.invalidate(..)) will
match any implementation of the HttpSession interface.  However, to make it
active, I need to get that Aspect in the classpath of every module loaded
and visible to the AJ weaver.

Is there a "generic" place I can declare the the aspects.jar so that it is
part of the classpath of every module loaded or is my only choice to modify
every module.xml in the system?

Thanks,

Eric
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