OK: If your rules are looping, it suggests
that you may have written them badly. (EG:
rule rule1
when
ObjectA
( $property : property==null )
then
$property
= 12;
update
(ObjectA);
end
rule rule2
when
ObjectA
( $property : property!=null )
then
$property
= null;
update
(ObjectA);
end
Try breaking things down into Ruleflow
Groups so that each logically separated section leads into the next.
Another way of handling this is do not
have Update calls in your rules.
Instead I attach listeners to each part
of the fact model - the listeners call Update for me.
If I want to prevent loops? I simply
disable the listeners.
On the current project I'm doing I've
done a combination of both of these, and it works well.
I hope this helps,
-Trav
Travis Smith
Analyst Programmer
Development Centre
BNZ
DDI: +644 4746356 (Or Ext 76356)
dbfree75 <wbismuth@yahoo.fr>
Sent by: rules-users-bounces@lists.jboss.org
25/05/2011 11:55 a.m.
Please respond to
Rules Users List <rules-users@lists.jboss.org>
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Subject
| Re: [rules-users] Update
function usage for java objects to be retrieved for database update |
|
I'm still using such solution .
Here an example of rule where I nees to set the
originalPropertyValuationLoan :
rule "OriginalPropertyValuationLoan - NbSecuredGaranteeUnderLoan >=
1 -
garantee H - postCode equivalent - initialValue equivalent"
no-loop
salience 970
dialect "mvel"
when
$controlFact
: ControlFact(phase == "INITIAL")
$loanEvaluated
: loanEvaluated(nbSecuredGaranteeUnderLoan >= 1,
originalPropertyValuationLoan == null)
$loan
: loan() from $loanEvaluated.loan
$garantee
: garantee(typegarantee.code == "H" , initialValue != null) from
$loan.garantees
$postCodes : Set(size == 1)
from accumulate(
garantee(typegarantee.code
== "H", $n :
postCodeInGarantee) from $loan.garantees,
collectSet($n)
)
$garantees : Set(size == 1)
from accumulate(
garantee(typegarantee.code
== "H" ||
typegarantee.code == "O", $n : typegarantee.code) from $loan.garantees,
collectSet($n)
)
$initialValue : Set(size == 1)
from accumulate(
garantee(typegarantee.code == "H", $n : initialValue ) from $loan.garantees,
collectSet($n)
)
then
$loanEvaluated.originalPropertyValuationLoan = $garantee.initialValue
update($loanEvaluated)
#System.out.println("OriginalPropertyValuationLoan
-
NbSecuredGaranteeUnderLoan > 1 : " +
$loan.loanEvaluated.originalPropertyValuationLoan);
end
In case this rule isn't fired because any of these conditions isn't set,
on
update after any other property has been set this rule will be fired
again
--
View this message in context: http://drools.46999.n3.nabble.com/Update-function-usage-for-java-objects-to-be-retrieved-for-database-update-tp2981879p2982338.html
Sent from the Drools: User forum mailing list archive at Nabble.com.
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