[rules-users] BRMS: Evaluation: JBoss Rules 3.2?

[Anstis, Michael (M.)]

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 <mailto:manstis1 at ford.com> >



		
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