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From: "Honton, Charles" <Charles_Honton@intuit.com>
To: Commons Developers List <dev@commons.apache.org>, Mark Struberg
	<struberg@yahoo.de>
Subject: RE: [classscan],[meiyo],[sandbox] Sharing a concrete proposal for
 class path scanning / class metadata
Thread-Topic: [classscan],[meiyo],[sandbox] Sharing a concrete proposal for
 class path scanning / class metadata
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Date: Wed, 11 Apr 2012 20:47:51 +0000
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Mark,

Please look at my implementation - http://chonton.github.com/meiyo-sandbox/=
 (I've accidently trashed my source respository, which I'll clean up tomorr=
ow.)  You can see the code through the javadoc and jxr reports.

The implementation tracks classes per location (jar or folder), with multip=
le locations per classloader, up to and including the bootstrap classloader=
.  Finding class information delegates the search up the parent chain, mirr=
oring the classloader pattern.=20

Additionally, the implementation includes a registry of classloader informa=
tion, so that multiple users need not introspect each classloader multiple =
times.  The code allows gc reclamation of the bcel objects to minimize memo=
ry footprint.  The registry holds weak references to the classloaders, so t=
hat the classloaders may be reclaimed.

Regards,
chas

-----Original Message-----
From: Mark Struberg [mailto:struberg@yahoo.de]=20

... We need to provide class scanning on a per-ClassLoader level. Many fram=
eworks (EJB, CDI, ...) need to take care about Class visibility and might e=
ven have to deal with 'shared-contexts'. Thus the commons-classscan as well=
 as xbean-finder must=A0 be aware of the ClassLoader hierarchy. Especially =
in multi-webapp environments this might (as side effect) also bring a prett=
y neat performance improvement as we don't need to scan those shared class =
paths redundantly!


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