(1) If you are looking for something simple my advice would be to define a
database schema that can record your type of query:
(Company=CCC && Organisation=OOO and Dept=HR) OR (Country=UK)
(Company=CCC && Organisation=OOO )and (Dept=HR OR Country=UK)
e.g.
COMPARISON_ELEMENTS_TABLE = Field, Operator, Value
COMPARISONS_TABLE = OpenBracket, COMPARISON_ELEMENT_ID, Connector,
CloseBracket
Then write Java code that can convert this into a DRL string that is then
handled the normal way.
(2) Firstly, I got the class name wrong. It should be
org.drools.ide.common.client.modeldriven.brl.RuleModel.
We already have code that converts the RuleModel object graph into DRL.
However the object model is not tided to a database schema but you could
write a layer that maps database tables to these objects.
This would be quite complex but I include here to explain what I was trying
to say.
With kind regards,
Mike
2011/3/25 bilasini sahoo <s.bilasini(a)gmail.com>
Hi,
Thanks for the reply.
But i can i get some more idea how to implement this.
I dont understand the "You could also look at writing a persistence layer
over FactModel which is the foregoing object model; to re-hydrate direct
from structured database tables with an ORM."
Can you please guide me something simple.
Thanks,
Bilasini
2011/3/25 Michael Anstis <michael.anstis(a)gmail.com>
> The easiest suggestion would be to store DRL in your database ;)
>
> These is a (dieing) BRL XML format but I believe its use is discouraged
> (as it's essentially an XStream output of a object model).
>
> You could also look at writing a persistence layer over FactModel which is
> the foregoing object model; to re-hydrate direct from structured database
> tables with an ORM.
>
> Looking however at your example rules; I believe the simplest approach
> would be to write your own parser that generates DRL.
>
> Have you considered Guvnor which would suit your needs ideally?
>
> With kind regards,
>
> Mike
>
> 2011/3/25 bilasini sahoo <s.bilasini(a)gmail.com>
>
>> Hi All,
>> I am new to this Drool rule ingine use.
>> Normal drl is working for me.
>> But mu requirement is i need to configure all the rules in Data base and
>> from there i need to inject to the Rule engine.This is beacuse Rules can be
>> configured any point of time.
>>
>> Please let me know if is there any special foemat of rule configuration
>> is required so that creating rule file would be easier
>>
>> currently i have configured as
>>
>> (Company=CCC && Organisation=OOO and Dept=HR) OR (Country=UK)
>> (Company=CCC && Organisation=OOO )and (Dept=HR OR Country=UK)
>>
>>
>> please advice. I am stuck with this proble since 2days
>>
>>
>> Thanks,
>> Bilasini
>>
>>
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>>
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>>
>>
>
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