Hi Rick, Is your concern more that the evaluation of the expressions is not performing well because of the performance of the filter implementation or is it that you have redundancy in the expressions and you want to (runtime) optimize the expressions themselves? If first is the case, I might be able to contribute my LDAP filter implementation used in Concierge and jSLP. It went through a large series of profiling and benchmarking and is really quite speedy in both parsing and evaluation. In case you want to test it, let me know.
Cheers, Jan. ----------------------------------------------------------- ETH Zurich, MSc Jan S. Rellermeyer, Information and Communication Systems Research Group (IKS), Department of Computer Science, IFW B 47.1, Haldeneggsteig 4, CH8092 Zürich Tel +41 44 632 30 38, http://www.iks.inf.ethz.ch ----------------------------------------------------------- > -----Original Message----- > From: Richard S. Hall [mailto:[EMAIL PROTECTED] > Sent: Wednesday, January 24, 2007 9:04 PM > To: felix-dev@incubator.apache.org > Subject: Needed: LDAP expression evaluation optimization > > Consider this a call for contributions. > > The latest changes to Felix' resolver adopt a generic > capability/requirement approach for resolving package > export/import and bundle provide/require constraints (with > the goal of also using this approach for host/fragment > constraints too). > > The benefit of this approach is that it provides a nice > generic way off adding and resolving additional types of > constraints to the Felix resolver. Another benefit is that > this resolver implementation can be shared with OBR, so the > same resolver can be used for deployment as well as runtime wiring. > > The downside of this approach is that it relies heavy on LDAP > expressions and their evaluation, which tends to slow things > down a bit. > > To offset this slowdown, I have cut some corners making the > capabilities/requirements not as generic as I would like. I > want this approach to be as generic as possible, but this > requires that we optimize LDAP expression evaluation. > > If anyone has experience in such areas and is willing to look > into this area for Felix, please let me know and I can > explain more precisely what we need. Overall, I think the > work should be pretty localized, so it should be an easy way > to get involved for someone with experience in this area. > > Search your soul, you know you want to contribute! ;-) > > -> richard >
