SV: [rules-users] Writing rules using java..

[Aeinehchi Nader]

I would very much like to wire my application with the rule engine.  By doing this, I would benefit from compiler, refactoring,....  Let me an example:

Car car = new Car();
car.setSpeed(100);


Fact requirement = new Fact(car.getSpeed() > 120);

if (requirement){
Rule rule = new Rule(car.isOverspeeding(true));
}

How does the above fit to DRL?  Can this be done in compile-time with DRL?  Or can it be done by using Drools API?

Thanks.


Vennlig hilsen/Best regards
Nader Aeinehchi
Sjefsarkitekt /Chief Architect 
EDB Business Partner Norge AS
Telefon: +47 22 52 80 80, Direkte + 47 23 32 02 88, mobil: +47 41 44 29 57
E-post: nader at edb.com
http://www.edb.com 
"EDB - En sterk og nær IT-partner"



-----Opprinnelig melding-----
Fra: rules-users-bounces at lists.jboss.org på vegne av Mark Proctor
Sendt: lø 3/3/2007 2:48
Til: Rules Users List
Emne: Re: [rules-users] Writing rules using java..
 
Just generate a drl from your model using a template langauge such 
velocity, freemarker or stringtemplate. you can generate and load the 
drl at runtime, this is what the decision table does. You can program 
agains the API yourself, but its quite complex, and certainly not 
recommended for a noobie.

Mark
Kolla, Sandeep wrote:
>
> Hi Rahul,
>
> Its not about storing the whole file into the database.
>
> I would have a Table representing the parameteres required to 
> construct a rule.
>
> For example.
>
> Tables:
>
> *RuleSetTable:*
> Ruleset_id
> Ruleset_name
>
> *RuleTable:*
> Rule_id
> Rule_name
> Rule_saliance
> Rule_condition
> Rule_consequence
> Ruleset_id
>
> Now while loading the rules the application basically should read from 
> the DB, and construct the rules, as everything required to construct 
> the rules is avaliable in the tables.
>
> This requirement had come up because as the rules keep changing quite 
> frequently, we don't want to bring down the application to load a new 
> DRL file.
>
> Hope you understood what I want to achieve.
>
> Thanks much,
> Sandeep.
>
>
>
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>
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