[jboss-dev] Improving scanning performance

[Anil Saldhana]

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).
>
> * If a file META-INF/no.scan exists in a jar, then don't scan the 
> file.  This allows libraries to exclude themselves from scanning.
This is good.
> * If a file META-INF/scan.only exists it will contain a newline 
> delimited list of class names to scan.  Only scan those class names.
Why not just scan the jar with the presence of the file?  It will become 
cumbersome to list all the class names if they are many classes to be 
scanned in a jar??