[jboss-dev] Improving scanning performance

[Andrew Lee Rubinger]

Andrew Lee Rubinger wrote:
> Bill Burke wrote:
>> I suggested this a year or two ago:
>>
>> * You should have a AnnotationScanner deployer that scans jars for 
>> annotations and puts an annotation database somewhere in memory that 
>> other deployers can reference.  (This might already exist, I don't know).
> 
> This should be served by MDR (metadata repository) subproject of MC:
> 
> http://anonsvn.jboss.org/repos/jbossas/projects/jboss-mdr/trunk/
> 
> ...which as I understand is able to collect type information without the 
> need for classloading (via Javassist).
> 
> Something I'd discussed a bit with Ales awhile back is refactoring 
> jboss-metadata to instead of using reflection a la:
> 
> http://anonsvn.jboss.org/repos/jbossas/projects/metadata/trunk/src/main/java/org/jboss/metadata/annotation/creator/AbstractProcessor.java 
> 
> 
> ...to instead read from MDR.  I admittedly haven't yet digged too much 
> here, but since you ask the question... ;)

The other important bit to mention about MDR is that it'll contain 
information added by AOP, which we don't get from straight reflection. 
There is currently a gap now in the object model as it doesn't account 
for, for instance, annotations tacked on in *-aop.xml files.

S,
ALR

-- 
Andrew Lee Rubinger
Sr. Software Engineer
JBoss, a division of Red Hat, Inc.
http://exitcondition.alrubinger.com