[rules-users] How best to get back the updates that rules perform on declarative fact objects onto the domain objects (Dynamic fact generation with Declarative Fact Model)

[Davide Sottara]

Hi Vidya,
I would suggesting trying one of the following two options. Both exploit
recently introduced
features: they are experimental, so it would be great to see them in action
and get feedback.
You'll need 5.4-SNAPSHOT or 5.4RC1 (coming out on Monday)

----------------------------------------------------------

1) Use property-specific
http://blog.athico.com/2012/01/fine-grained-property-change-listeners.html

use "listener" rules to synchronize your fields:

declare Bean
@propertyReactive
  a : String
end

rule "Link field A"
when
 $b: Bean( $a : a ) @watch( a )
 $x : DomainObject( a != $a ) 
then
 $x.setA( $a );
end

The main disadvantage is that you have to write rules for each field (you
could generate them automatically from templates and add the resulting DRL)
----------------------------------------------------------

2) Use traits
http://blog.athico.com/search/label/traits

declare trait Bean
  a : String
end

rule "Don"
no-loop
when
  $x : DomainObject()
then
  don( $x, Bean.class )
end

Afterwards, any update on the "Bean" instance will be refelected on the
underlying DomainObject.

----------------------------------------------------------

Please get back to us in case you have problems
Best
Davide

--
View this message in context: http://drools.46999.n3.nabble.com/How-best-to-get-back-the-updates-that-rules-perform-on-declarative-fact-objects-onto-the-domain-obje-tp3873966p3874001.html
Sent from the Drools: User forum mailing list archive at Nabble.com.