I'm not sure what the initial set of facts is,butI'm assuming that you
have any number of potentially matching quadruplets
Translog - Product - ProductCategory - Category.
For good measure, I add
declare Superiors
cname: String
superiors: Set<String>
end
for defining, for each category, the more important categories: you'll
need to insert three static facts.
Doing away with all this non-declarative salience and flow you can now
make do with two rules:
rule "insert recommendation"
when
$tr: Translog($trpid : pid)
$p: Product(pid == $trpid, $pid : pid, $price : price, $brand : brand)
$pcat: ProductCategory(pid == $pid, $cid : cid)
$cat: Category(cid == $cid, cname == "pets", $cname : cname)
not ( Recommendation( $xname: cname )
and
Superiors( cname == $cname, superiors contains $xname ) )
then
insert(new Recommendation($pid, $price, $brand, $cname));
end
rule "remove low priorities"
when
$recomm: Recommendation( $cname: cname )
exists( Recommendation( $xname: cname )
and
Superiors( cname == $cname, superiors contains $xname ) )
then
retract($recomm)
end
And you may add a low-salience background rule for extracting the results.
rule "show recomms"
salience -999
when
$recomm : Recommendation()
then
System.out.println($recomm);
end
Untested!
-W
(Who eats "pets"????)
On 01/10/2012, raffi <[email protected]> wrote:
> Hi,
>
> I am novice in Drools. Up to my following problem nearly everything worked
> fine for me.
> In my case I thought mixing the two group mentioned is the right way, and
> it
> could be the right way if I use it in a correct way. The problem is that I
> don't get a result.
>
> ...
> rule "pets"
> salience 20
> ruleflow-group "pets"
> activation-group "categories"
> when
> $tr : Translog($trpid : pid)
> $p : Product(pid == $trpid, $pid : pid, $price : price,
> $brand :
> brand)
> $pcat : ProductCategory(pid == $pid, $cid : cid)
> $cat : Category(cid == $cid, cname == "pets", $cname : cname)
> then
> insert(new Recommendation($pid, $price, $brand, $cname));
> end
>
> rule "remove everything except pets"
> salience 19
> ruleflow-group "pets"
> when
> $recomm : Recommendation((cname == "food") || (cname ==
> "vegetable") ||
> (cname == "drinks"))
> then
> retract($recomm)
> end
>
> rule "food"
> salience 16
> ruleflow-group "food"
> activation-group "categories"
> when
> $tr : Translog($trpid : pid)
> $p : Product(pid == $trpid, $pid : pid, $price : price,
> $brand :
> brand)
> $pcat : ProductCategory(pid == $pid, $cid : cid)
> $cat : Category(cid == $cid, cname == "food", $cname : cname)
> then
> insert(new Recommendation($pid, $price, $brand, $cname));
> end
>
> rule "remove everything except food"
> salience 15
> ruleflow-group "food"
> when
> $recomm : Recommendation((cname == "vegetable") || (cname ==
> "drinks"))
> then
> retract($recomm)
> end
> ...
>
> The idea is that I firstly add a new object (Recommendation) to my working
> memory. After that I check if there are already existing
> Recommendation-objects. Such objects that are from a less important
> category
> should now be removed. The priority attribute is the /cname/ (category
> name). So in the end there can be more Recommendation objects of one
> category but never of different categories.
> I request the result in the following way (perhaps this is incorrect):
> rule "show recomms"
> salience 5
> when
> $recomm : Recommendation()
> then
> System.out.println($recomm);
> end
>
> So the result is an empty console, but with my test data there should be
> two
> Recommendation objects in my working memory after terminating.
>
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/mixing-activation-group-and-ruleflow-group-tp4020058.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> [email protected]
> https://lists.jboss.org/mailman/listinfo/rules-users
>
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