12:22 p.m.
I solved this problem, though not sure the exact cause. In Eclipse, I
had created a project in which I wrapped the Drools jar files,
exported the plugin, etc. However, I left the project in my
workspace. This apparently interfered with the Drools eclipse tools.
When I deleted the wrapper project from my workspace, the eclipse
tools for drools work fine.
- Mike
On Nov 24, 2007, at 4:18 PM, rules-users-request(a)lists.jboss.org wrote:
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> Today's Topics:
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> 1. RE: Re: Drools and BRMS (60,000+ rules) (Carlsen, Len)
> 2. Re: Re: Drools and BRMS (60,000+ rules) (Mark Proctor)
> 3. Eclipse tools question (J Michael Dean)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 24 Nov 2007 11:43:22 -0800
> From: "Carlsen, Len" <len.carlsen(a)ubc.ca>
> Subject: RE: [rules-users] Re: Drools and BRMS (60,000+ rules)
> To: "Rules Users List" <rules-users(a)lists.jboss.org>
> Message-ID:
> <F00D5E1871EEE14E86E7F2864F4730F508293CB0(a)exchange11.mercury.ad.ubc.ca
> >
>
> Content-Type: text/plain; charset="us-ascii"
>
> We would probably use the existing server side code and extent the
> current BRMS client UI, to satisfy our needs. By designing our BRMS I
> mostly meant designing the structure of all our rule domains,
> rules/packages and facts (courses/learning units).
>
> Len
>
> ________________________________
>
> From: rules-users-bounces(a)lists.jboss.org
> [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mark Proctor
> Sent: Saturday, November 24, 2007 1:02 AM
> To: Rules Users List
> Subject: Re: [rules-users] Re: Drools and BRMS (60,000+ rules)
>
>
> Carlsen, Len wrote:
>
> This is very cool and is exactly what we will need for our new
> open
> source SIS. Once we have designed our BRMS then we will look
> more
> closely at Drools Solver (especially after the ITC competition).
>
>
>
> Are you writting your own BRMS from scratch? Are there any particular
> issues with the BRMS at the moment that would warrant this? Maybe you
> could work on the BRMS we have now to extend it to satisfy your needs.
>
>
> Currently, we are using Ad Astra for our course timetabling and
> exam
> scheduling and it would be good if we could replace that with
> Solver.
>
> Thanks for your interest,
>
> Len
>
> -----Original Message-----
> From: rules-users-bounces(a)lists.jboss.org
> [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of
> Geoffrey De
> Smet
> Sent: Friday, November 23, 2007 5:09 AM
> To: rules-users(a)lists.jboss.org
> Subject: [rules-users] Re: Drools and BRMS (60,000+ rules)
>
>
> Mark Proctor wrote:
>
>
> Carlsen, Len wrote:
>
>
> Other issues are the performance of the Drools
> Solver and having
> thousands of rules compiled, loaded and running.
> During registration
> we could have thousands of rules executing
> concurrently. The rules
> engine and the BRMS would be services as part of
> an SOA
>
>
> infrastructure
>
>
> (and an OSGi service environment). Anyone got
> any experience with
> Drools in an OSGi environment with respect to
> class loading issues
> when compiling rules and facts from other
> bundles since rules and
> facts may be in different bundles? Bundle buddy
> class loading?
>
>
>
> No but it is something that interests us, please give us
> your OSGi
> feedback. Solver is not currently a supported product,
> its very much
>
>
> R&D
>
>
> alphaware, but I'm sure geoffrey would love your
> feedback, good to see
>
>
>
>
>
> people are evaluating it.
>
>
>
> yes, feedback on solver is very welcome :)
>
> The good news is, I am now working on an example called
> Examination,
> which is an implementation for the itc2007 examination
> competition:
>
> http://www.cs.qub.ac.uk/itc2007/examtrack/exam_track_index_files/exameva
> luation.htm
> It's based on real-world data. The "starter" dataset contains
> 7883
> students, 607 exams, 54 periods and 7 rooms. There are 5 hard
> constraints and 7 soft constraints:
>
> http://www.cs.qub.ac.uk/itc2007/examtrack/exam_track_index_files/exameva
> luation.htm
>
> The bad news is, it's not performing yet, because I need to make
> a
> scalable selector implementation, which I am working on.
>
> There's an example called lesson schedule (which schedules
> courses), but
>
> that's just a toy example to learn drools-solver, at it just has
> 2 hard
> constraints.
>
> One piece of advice though: separate the solver part from the
> rest. Once
>
> the solver starts calculating, you 'll only want to have
> score-related
>
> rules in the rulebase. The solver can easily do a million
> fireAllRules
> per minute, so every performance loss is blown up.
>
> With kind regards,
> Geoffrey De Smet
>
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