[rules-users] Help on using Drools with embedded objects

[D1vy@@Ind1@]

A couple of more questions,

I am calling my rules engine from a service and into the session i am
inserting the business object.

In my service class, I have a few helper functions, which I need to call
from my drl file.

How can I do that ?

Thanks
-D



Corneil du Plessis wrote:
> 
> You should initialise your globals and then pass them into the session.
> Your rule file will have:
> 
> global java.lang.String recipients
> global java.lang.String to
> global java.lang.String cc
> 
> 
> On Mon, 2009-02-23 at 06:23 -0800, D1vy@@Ind1@ wrote:
> 
>> Thanks for your help , Sudhir, 
>> 
>> I used 
>> 
>> rule
>> when $a:A(b.z.s=="test");
>> then
>> end
>> 
>> And that solved my problem.
>> 
>> But I would like to know one more information about global variables.
>> 
>> package...
>> dialect java
>> import ..,
>> 
>> global java.lang.String recipients="divya at gmail.com"
>> global java.lang.String to="xyz at yahoo.com"
>> global java.lang.String cc="abc at gmail.com"
>> 
>> rule
>> when when $a:A(b.z.s=="divya");
>> then
>> $a.setRecipients(recipients);
>> $a.setTo(to);
>> $a.setCC(cc);
>> update($a)
>> end
>> 
>> Is this feasible with Drools. I get 
>> 
>> unable to comile myfile.drl file
>> [9,40]: unknown:9:40 mismatched token: [@49,201:201='=',<71>,9:40];
>> E
>> 
>> exception. Could you please help me with this too.
>> 
>> 
>> Thanks
>> -D
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> Sudhir M-2 wrote:
>> > 
>> > Hi D,
>> > I don't know which version of drools are you using. If u are using
>> drools
>> > 4
>> > or higher you can use 'from'  to write rules on nested objects. All u
>> need
>> > to do is insert the root pbject in the working memory
>> > 
>> > Regards,
>> > sudhir.
>> > 
>> > On Mon, Feb 23, 2009 at 2:56 PM, Divya Rajendranath <
>> > divya.rajendranath at gmail.com> wrote:
>> > 
>> >> Hi,
>> >>
>> >> I am planning to use Drools - JBoss Rules Engine. My requirement is to
>> >> disburse mails from my application to different groups based on
>> various
>> >> criteria. I want to use Drools here.
>> >>
>> >> My object structure is as follows:
>> >>
>> >> class A{
>> >>
>> >> String B = "";
>> >>
>> >> B b;
>> >>
>> >> C c;
>> >> }
>> >>
>> >> Hence Obj A has embedded objects within it, and obj B and C further
>> has
>> >> embedded objects.
>> >>
>> >> class B {
>> >>
>> >> String X;
>> >>
>> >> Z z;
>> >>
>> >> }
>> >>
>> >> class Z{
>> >>
>> >> String t;
>> >>
>> >> String s;
>> >>
>> >> }
>> >>
>> >> The decision on sending the mails based on the fields in embedded
>> objects
>> >> of A. I pass instance of A to Drools
>> >>
>> >> Format of drl file:
>> >>
>> >> package...;
>> >>
>> >> import ..;
>> >>
>> >> rule "Test"
>> >>
>> >> when $a:A(B(Z(s == "testvalue")))
>> >>
>> >> then
>> >>
>> >> $a.setSomething();
>> >>
>> >> update($a);
>> >>
>> >> end
>> >>
>> >> I wanted to know if this (accessing fields in embedded/child object)
>> is
>> >> feasible with Drools.
>> >>
>> >> I get an error saying "UNable to compile myfile.drl when i try to fo
>> >> this.
>> >>
>> >> Could some one look into this issue and let me know the reason for
>> this ?
>> >>
>> >>
>> >>
>> >> Thanks
>> >>
>> >> -D
>> >>
>> >> _______________________________________________
>> >> rules-users mailing list
>> >> rules-users at lists.jboss.org
>> >> https://lists.jboss.org/mailman/listinfo/rules-users
>> >>
>> >>
>> > 
>> > _______________________________________________
>> > rules-users mailing list
>> > rules-users at lists.jboss.org
>> > https://lists.jboss.org/mailman/listinfo/rules-users
>> > 
>> > 
>> 
> 
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
> 
> 

-- 
View this message in context: http://www.nabble.com/Help-on-using-Drools-with-embedded-objects-tp22158087p22205576.html
Sent from the drools - user mailing list archive at Nabble.com.