[rules-users] BRMS: Evaluation: JBoss Rules 3.2?
Mark Proctor
mproctor at codehaus.org
Tue Jan 23 11:12:41 EST 2007
not sure its that simple as the stack concept is built into the engine.
but good luck.
Mark
Anstis, Michael (M.) wrote:
> Thanks Mark,
>
> I think I've got the hang of AgendaGroups!!
>
> Presumably if I sub-class DefaultAgenda and override
> setFocus(AgendaGroup ag) and getNextfocus() I can implement my own
> flow-like mechanism instead of the standard stack. I'd need to add a
> way in which to override the DefaultAgenda created in
> ReteooWorkingMemory's constructor too but this again should be
> a simple sub-class (together with a subclass of ReteooRulebase with
> override of newWorkingMemory and a new RuleBaseFactory to allow me to
> construct these new objects). Anything major I've missed - my
> experience with rules engines now totals a couple of weeks and it's
> possible I'm missing the point!!
>
> With kind regards,
>
> Mike
>
> ------------------------------------------------------------------------
> *From:* rules-users-bounces at lists.jboss.org
> [mailto:rules-users-bounces at lists.jboss.org] *On Behalf Of *Mark
> Proctor
> *Sent:* 22 January 2007 16:33
> *To:* Rules Users List
> *Subject:* Re: [rules-users] BRMS: Evaluation: JBoss Rules 3.2?
>
> Anstis,
>
> We don't have ruleflow, but we do have AgendaGroups which can
> provide a form of rule flow, just that its actually stack based.
> I'm working on a more general ruleflow idea at the moment, it may
> make it into the end of Q1 release, but its not defnite yet.
>
> Normally you cache the rulebase in a singleton and then just
> creating working memory instances as and when you need to -
> creating a working memory is light.
>
> The guided gui builder is for 3.2, it's web only based on GWT, I
> believe that it will also do DSLs (Mic will have to confirm that).
>
> Mark
> Anstis, Michael (M.) wrote:
>>
>> Hi,
>>
>> I'm evaluating BRMS's for a new project at work.
>>
>> JBoss Rules today swung into pole position however I am unclear
>> on a number of features. I wonder whether this user-group can help?
>>
>> I list a number of aspects I "think" are currently missing in
>> JBoss Rules together with my thoughts: If anybody can clarify the
>> position, provide alternatives or help push JBoss Rules I'd be
>> pleased to hear!
>>
>> * We require ruleflow (where rules run sequentially; like
>> "identify all machines X" then "calculate prices" - not
>> perhaps a good illustration as this could be written as one
>> rule "calculate all prices using machine XXX"!!!). Ideally
>> "dynamic" ruleflow is required too - where the next rule in
>> a sequence is determined by the outcome of a preceding rule
>> (I have seen dynamic achieved with "trigger" Facts asserted
>> as the RHS of rules however our "Business Users" cannot be
>> expected to author rules following this design pattern. I
>> have also seen static implemented with salience). Is
>> ruleflow (static or dynamic) part of 3.2 - otherwise we'll
>> need to categorise rules having different types fired
>> throughout a "coded" process in Java.
>> * A J2EE runtime to provide scalability of the RETE engine.
>> We need to have the engine being shared across sessions on
>> a web-server. What experiences have others had? Do you
>> simply provide a working memory instance per session (how
>> does this scale horizontally?). I also read that an
>> Application Server runtime would be part of 3.2, is this true?
>> * A rule authoring environment for end-users. I read on Mark
>> Proctor's blogg that this is in development but is it set
>> for inclusion in 3.2 and does it handle DSL too; otherwise
>> we'd have to write out own?
>>
>> With kind regards,
>>
>> Michael Anstis
>> -------------------------------------------
>> *Next Generation Estimating System*
>> ( Trafford House (Int) 8 718 2239
>> ( Trafford House (Ext) +44 (0)1268 702239
>> * <_mailto:manstis1 at ford.com_>
>>
>>
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