[rules-users] KnowledgeAgent, change-set and BRL

[Bruno Freudensprung]

Hi Esteban,

Thank you for your fast answer!

I am planning to integrate the Drools Eclipse plugin into an RCP 
application (that will be used to create rules, but not only). Maybe I 
am wrong but I would like to avoid using Guvnor that seems to be 
complicated from a deployment point of view (an additional server into 
our architecture). That's why I planned to build the KnowledgeBase 
(based on the files generated by the Drools Eclipse plugin in my 
application) and to fire the rules using the API.

I have the impression (but maybe it is just a consequence of my 
inexperience) that Drools' API lacks some kind of "put the pieces 
together" feature that would ease the KnowledgeBase building. Something 
like a KnowledgeAgent that would take a directory as input, build DRLs 
from BRLs + drools packages (expected next to BRLs), etc... I also have 
the impression that the directory layout and file extensions could be 
"enforced" (a bit like javac that expects .java files located in 
directories corresponding to packages). There seems to be conventions 
like that in Guvnor ("sub-directories" in packages containing technical 
rules, business rules, dsls... rule "inheritance" from a parent package 
to sub-package, and useful things like that) but they do not seem to 
have any equivalent in the Drools' Core API. And that's exactly where I 
am :-).

Anyway, I have tried adding the "drools.package" as a DRL into the 
change-set... :

    <add>
        <resource source="classpath:misc/drools.package" type="DRL" />
        <resource source="classpath:misc/KBuilder_Test.brl" type="BRL" />
    </add>

...but it does not work (I still get the "KnowledgeAgent has 
KnowledgeBuilder errors  object=Unable to resolve ObjectType..." error).

Best regards,

Bruno.

Esteban Aliverti a écrit :
> Why are you trying to work with BRL format? This format is only used 
> to store rules in guvnor/eclipse and it is not prepared to be used in 
> any environment. The main problem is that BRL doesn't contain all the 
> information needed to be compiled. For example, it doesn't contain any 
> package nor import definition.
> What you could try is to add a DRL in your change-set (before the BRL) 
>  containing only the import statements. Could you please try it and 
> tell me the results?
>
> Best Regards, 
>
>
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>
> Esteban Aliverti
> - Developer @ http://www.plugtree.com <http://www.plugtree.com>
> - Blog @ http://ilesteban.wordpress.com
>

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