Greg,
As of now the solutions that i have got from everyone in this forum are
1. Greg : use a rules engine that implements rete the functionality.
I couldn't any for the same on any drool doc that i have (gave
you the link that i am referring to.)
2. Scott & Michael : combine the Rulebase, i had some query about it and
have posted the same.
3. Vikrant : did not suggest any solution.
These are the ones i have received if i missed some please post them again i
haven't received it.
Greg let me know if i have missed the solution.
thank you all looking ahead for reply and solutions........
Greg Barton wrote:
Nikhil, there seems to be a communication breakdown here. Several people
have suggested a solution that I believe fits your problem, but I'm not
sure that you understand what they're saying. Generally, if I were
dealing with a situation like this face to face, I'd have you summarize
what others have suggested to see if you understood their ideas. Would
you be willing to do that?
--- On Fri, 3/13/09, Nikhil_dev <k.nikhil(a)verchaska.com> wrote:
> From: Nikhil_dev <k.nikhil(a)verchaska.com>
> Subject: RE: [rules-users] Identify Rule on Attributes
> To: rules-users(a)lists.jboss.org
> Date: Friday, March 13, 2009, 7:16 AM
> Perfect this is the situation but the only difference is the
> last part,
>
> Rulebase for all the 3 Rules are stored in memory.
>
> Now i have is attributes(implemented as bean class), but
> the issue is i dont
> know which Rulebase to use out of the three which is
> present in the memory,
> fetching them one by one and executing it individually is
> possible but a
> long procedure which i want to avoid.(executing 3 Rule is
> ok what if i have
> 100000 rules it will be very slow process)
>
> I would like to know is there any mechanism to understand
> which rulebase
> will be appropriate without executing the rule completely.
> a mechanism such
> as where we can compare the set of variable required by the
> rule and set of
> variable that i am passing for execution. this can be one
> of the mechanism,
> like that is there any other mechanism available with
> drools.
>
> I hope i am clear enough, please let knw...if i need to be
> more clear, it
> will be very helpful......
>
> Thank u all for the response.....
>
> Anstis, Michael (M.) wrote:
> >
> > Hi Nikhil,
> >
> > Let's break down what you have said into pseudo
> Drools terms:-
> >
> > Rule 1
> > AdultFare(value==3000)
> > ChildFare(value==2500)
> > Then
> > //Do what you want to do
> > End
> >
> > Rule 2
> > ChildFare(value==2000) or
> > InfantFare(value==1500)
> > Then
> > //Do what you want to do
> > End
> >
> > Rule 3
> > AdultFare($f1 : value)
> > InfantFare($f2 : value)
> > eval($f1 + $f2 < 4000)
> > Then
> > //Do what you want to do
> > End
> >
> > You suggest you have a RuleBase that has been
> successfully loaded.
> >
> > You state you have some attributes (I assume these to
> be implemented as
> > Classes).
> >
> > StatefulSession ss = rulebase.newStatefulSession();
> > ss.insert( new AdultFare(1000) ); //<-- Causes
> object to be compared
> > to ALL rules. This is how RETE works
> > ss.insert( new InfantFare(1000) ); //<-- Causes
> object to be compared
> > to ALL rules. This is how RETE works
> > ss.fireAllRules(); //<-- Causes
> the "then" part of
> > Rule 3 to execute
> >
> > It sounds like you are trying to hard.
> >
> > With kind regards,
> >
> > Mike
> >
> > -----Original Message-----
> > From: rules-users-bounces(a)lists.jboss.org
> > [mailto:rules-users-bounces@lists.jboss.org] On Behalf
> Of Nikhil_dev
> > Sent: 13 March 2009 11:19
> > To: rules-users(a)lists.jboss.org
> > Subject: RE: [rules-users] Identify Rule on Attributes
> >
> >
> > Thank you Michael,
> > Following is the use-case/example/Situation that i
> trying to make it
> > work
> > Consider Example ::::
> > Rule 1: requires attributes/Values :::::::: adultFare
> == 3000 and
> > ChildFare
> > == 2500
> > Rule 2: requires attributes/Values :::::::: ChildFare
> == 2000 or
> > InfantFare
> > == 1500
> > Rule 3: requires attributes/Values :::::::: AdultFare
> + InfantFare <
> > 4000
> >
> > Above said rules is complied and its Rulebase is
> stored in the
> > memory......
> >
> > Now i have adultFare and InfantFare Attribute in
> hand....... so now is
> > there
> > any way with the help of drools we can identify which
> rule to execute
> > with
> > out executing all of them one after the
> another.......as per the example
> > Rule3 should be executed....and will give right
> output.......
> >
> > I hope u got what i am trying to do..... let me know
> weather it is
> > possible........ through RETE algo used inside drools
> or should i do it
> > on
> > my own of identifying the rules.......
> >
> >
> > Anstis, Michael (M.) wrote:
> >>
> >> I concur everybody's statements fully.
> >>
> >> The purpose of a rules engine is to remove the
> need for the
> > application
> >> developer to code algorithms to determine which of
> a set of rules
> > should
> >> execute given a set of
> facts\properties\objects. Drools implements the
> >> RETE algorithm. Writing your own code to determine
> which rule should
> > be
> >> executed would be like writing your own video
> driver so you can
> > display
> >> an image.
> >>
> >> Of course "we" all assume you plan on
> using Drools as a rule engine; a
> >> black box to drive the execution of consequences
> based upon rule
> >> definitions and domain objects. As you state in
> your last post below;
> >> your "point is that [you] want to use rule
> engine in [your]
> > application
> >> at it's fullest". Without a clearer
> description of your use-case it
> >> might be impossible for anybody to give an answer
> that helps with your
> >> particular issue.
> >>
> >> These forums are an excellent place to find
> solutions. Everybody has
> >> always been extremely helpful to me.
> >>
> >> I hope you are not discouraged by the responses
> received to date and
> > am
> >> sure everybody is genuinely trying to help.
> >>
> >> With kind regards,
> >>
> >> Mike
> >>
> >> -----Original Message-----
> >> From: rules-users-bounces(a)lists.jboss.org
> >> [mailto:rules-users-bounces@lists.jboss.org] On
> Behalf Of Nikhil_dev
> >> Sent: 13 March 2009 06:44
> >> To: rules-users(a)lists.jboss.org
> >> Subject: RE: [rules-users] Identify Rule on
> Attributes
> >>
> >>
> >> Hi Vikrant,
> >>
> >> Please go through all the post and try understand
> what i am trying to
> >> get
> >> from rule engine............ please do not post
> just for the namesake.
> >> My point is that i want to use rule engine in my
> application at its
> >> fullest,
> >> if something is possible in Rule engine i would
> like to experiment on
> >> it.
> >>
> >> Cheers,
> >> Nikhil.
> >>
> >>
> >>
> >>
> >> Vikrant Yagnick wrote:
> >>>
> >>> Hi Nikhil,
> >>>
> >>> Drools implements the RETE algorithm. The
> "average" rules user does
> >> not
> >>> need to bother or even care about it. All you
> need to do is use the
> >> rule
> >>> engine(for which you do not need to design or
> write your own
> >> algorithm)
> >>> and it will automatically do the work for you.
> >>>
> >>> Cheers,
> >>> Vikrant
> >>>
> >>> -----Original Message-----
> >>> From: rules-users-bounces(a)lists.jboss.org
> >>> [mailto:rules-users-bounces@lists.jboss.org]
> On Behalf Of Nikhil_dev
> >>> Sent: Friday, March 13, 2009 11:35 AM
> >>> To: rules-users(a)lists.jboss.org
> >>> Subject: Re: [rules-users] Identify Rule on
> Attributes
> >>>
> >>>
> >>>
> >>> from the doc i got what is Rete algo ... but
> not getting the way to
> >>> implement it.... using drools
> >>>
> >>>
> >>> Nikhil_dev wrote:
> >>>>
> >>>>
> >>>> if this is the doc
> >>>>
> >>
> >
>
http://downloads.jboss.com/drools/docs/4.0.4.17825.GA/html_single/index.
> >> html
> >>>> u are talking about then i coudl'nt
> find much help.
> >>>> It will be very helpful if u can give me a
> kick start on the
> >> same.......
> >>>> since i am just an average rule engine
> user.....some helpful doc on
> >> the
> >>>> same
> >>>>
> >>>>
> >>>>
> >>>> Greg Barton wrote:
> >>>>>
> >>>>>
> >>>>> Yes, if you use a rules engine that
> implements rete the
> >> functionality
> >>>>> you
> >>>>> need is available.
> >>>>>
> >>>>> Read the Drools docs.
> >>>>>
> >>>>> Carefully.
> >>>>>
> >>>>> GreG
> >>>>>
> >>>>> On Mar 12, 2009, at 23:40, Nikhil_dev
> <k.nikhil(a)verchaska.com>
> >> wrote:
> >>>>>
> >>>>>
> >>>>> thank u Scott and Greg for u'r
> reply......
> >>>>>
> >>>>> by the way Greg is it possible for me
> to use this rete algo through
> >> rule
> >>>>> engine as this functionality already
> available in the core of Rule
> >>>>> Enigne
> >>>>> or
> >>>>> should i implement this out side rule
> engine.
> >>>>>
> >>>>>
> >>>>> Greg Barton wrote:
> >>>>>
> >>>>>
> >>>>> That's the core functionality of a
> rule engine. The rete algorithm
> >> does
> >>>>> this, and drools implements rete.
> >>>>>
> >>>>> --- On Thu, 3/12/09, Nikhil_dev
> <k.nikhil(a)verchaska.com> wrote:
> >>>>>
> >>>>> so now is there
> >>>>> any way with the help of drools we can
> identify which rule
> >>>>> to execute with
> >>>>> out executing all of them one after
> the another
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> _______________________________________________
> >>>>> rules-users mailing list
> >>>>> rules-users(a)lists.jboss.org
> >>>>>
>
https://lists.jboss.org/mailman/listinfo/rules-users
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> -----
> >>>>> Regards,
> >>>>> :working:Nikhil
> >>>>> --
> >>>>> View this message in context:
> >>>>>
> >>
> >
>
http://www.nabble.com/Identify-Rule-on-Attributes-tp22471473p22490126.ht
> >> ml
> >>>>> Sent from the drools - user mailing
> list archive at
Nabble.com.
> >>>>>
> >>>>>
> _______________________________________________
> >>>>> rules-users mailing list
> >>>>> rules-users(a)lists.jboss.org
> >>>>>
>
https://lists.jboss.org/mailman/listinfo/rules-users
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> _______________________________________________
> >>>>> rules-users mailing list
> >>>>> rules-users(a)lists.jboss.org
> >>>>>
>
https://lists.jboss.org/mailman/listinfo/rules-users
> >>>>>
> >>>>>
> >>>>
> >>>>
> >>>
> >>>
> >>> -----
> >>> Regards,
> >>> :working:Nikhil
> >>> --
> >>> View this message in context:
> >>>
> >>
> >
>
http://www.nabble.com/Identify-Rule-on-Attributes-tp22471473p22490776.ht
> >> ml
> >>> Sent from the drools - user mailing list
> archive at
Nabble.com.
> >>>
> >>>
> _______________________________________________
> >>> rules-users mailing list
> >>> rules-users(a)lists.jboss.org
> >>>
>
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> >>>
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> >>
> >>
> >> -----
> >> Regards,
> >> :working:Nikhil
> >> --
> >> View this message in context:
> >>
> >
>
http://www.nabble.com/Identify-Rule-on-Attributes-tp22471473p22491091.ht
> >> ml
> >> Sent from the drools - user mailing list archive
> at
Nabble.com.
> >>
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users(a)lists.jboss.org
> >>
>
https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users(a)lists.jboss.org
> >>
>
https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >>
> >
> >
> > -----
> > Regards,
> > :working:Nikhil
> > --
> > View this message in context:
> >
>
http://www.nabble.com/Identify-Rule-on-Attributes-tp22471473p22494433.ht
> > ml
> > Sent from the drools - user mailing list archive at
>
Nabble.com.
> >
> > _______________________________________________
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> > rules-users(a)lists.jboss.org
> >
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> >
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> >
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> >
> >
>
>
> -----
> Regards,
> :working:Nikhil
> --
> View this message in context:
>
http://www.nabble.com/Identify-Rule-on-Attributes-tp22471473p22495260.html
> Sent from the drools - user mailing list archive at
>
Nabble.com.
>
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