[rules-users] Identify Rule on Attributes

Fri Mar 13 07:18:45 EDT 2009

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 at lists.jboss.org
> [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Nikhil_dev
> Sent: 13 March 2009 06:44
> To: rules-users at 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 at lists.jboss.org
>> [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Nikhil_dev
>> Sent: Friday, March 13, 2009 11:35 AM
>> To: rules-users at 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 at 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 at 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 at lists.jboss.org
>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>>
>>>>
>>>>
>>>>
>>>> -----
>>>> Regards,
>>>> :working:Nikhil
>>>> --
>>>> View this message in context:
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>>>>
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>>>>
>>>>
>>>>
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>>>>
>>>
>>>
>> 
>> 
>> -----
>> Regards,
>> :working:Nikhil
>> --
>> View this message in context:
>>
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> 
> 
> -----
> Regards,
> :working:Nikhil
> -- 
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-----
Regards,
:working:Nikhil
-- 
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