Hi all guys! That sounds really interesting!!! I think that bringing the new ideas in existing [meiyo] APIs would allow us releasing a new component soon! Thanks in advance for your help and interesting, looking forward to hear from you soon!!! Simo
http://people.apache.org/~simonetripodi/ http://www.99soft.org/ On Fri, Jul 22, 2011 at 11:41 AM, Mark Struberg <strub...@yahoo.de> wrote: > Hi! > > Jakob Korherr (apacheId jakobk) is also interested and did some work in this > area in MyFaces and OWB already. > > There are 2 main parts in this project > > a.) A classpath scanner which does _not_ use Class.getDeclaredXxx etc, since > this allocates memory in the ClassLoader which cannot get freed up later. In > a mid sized project this leads to getting 100MB of PermGenSpace easily! This > is what Davids xbean-finder fixes already by just scanning the structure from > the bytecode directly. > > b.) Lots of EE apps need to scan the classpath for annotations (e.g. MyFaces, > OpenWebBeans, Tomcat, OpenEJB, etc). So this part is done redundantly a few > times when starting the server. I hacked a quick API + SPI to do all this in > one go. The trick is to introduce a register mechanism where > classscan-clients can register their needs before the scan gets performed. > > > We like to do this at commons because it's really decoupled from all the > single projects and could be useful for a lot more projects which added some > kind of annotation processing lately. > > LieGrue, > strub > > --- On Fri, 7/22/11, Matt Benson <gudnabr...@gmail.com> wrote: > >> From: Matt Benson <gudnabr...@gmail.com> >> Subject: [sandbox] class scanning + karma requests >> To: dev@commons.apache.org >> Cc: dblev...@apache.org, "Gerhard Petracek" <gerhard.petra...@gmail.com> >> Date: Friday, July 22, 2011, 4:30 AM >> First, Simo added [meiyo] to the >> sandbox. Now, some of the guys from >> the various JEE-related communities have expressed interest >> in working >> with class scanning here at Commons. What we would >> propose to do is >> start with the code of Geronimo's xbean-finder, which scans >> classes by >> reading bytecode to populate meta-structures, thereby >> sparing permgen >> space whenever possible. We plan to carefully prune >> and polish that >> code, pull in the best ideas from [meiyo] (Simo and/or any >> of the rest >> of you Commons developers are of course welcome to >> participate as >> always!), and add a single-scan SPI strategy to allow the >> majority of >> consumers to share the impact of scanning. For my own >> part, I hope to >> be able to contribute such that the final API can >> accommodate most if >> not all conceivable use-cases for classpath scanning, while >> not >> becoming too unwieldy. We'd like to get started ASAP >> (and obviously >> nothing stops me from going ahead and taking the first >> steps). I >> would also request our new chair grant sandbox karma to: >> >> struberg (Mark Struberg) >> dblevins (David Blevins) >> gpetracek (Gerhard Petracek} >> >> Thanks, >> Matt >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org >> For additional commands, e-mail: dev-h...@commons.apache.org >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
