[rules-users] no-loop & lock-on-active clarification

[Greg Barton]

You certainly need no-loop for rule "1 precondition" as it stands because the Foo is updaetd, but not in a way that prevents the rule from firing again. One way to prevent that would be to put a condition in the rule that is the antithesis of some update you make:

rule "1 precondition"     
 when
  foo : Foo( preconditionPassedRule not contains "1 precondition", f1 != null, f2 != null)
 then 
  foo.addPreconditionPassedRule("1 precondition");
  update(foo)
end

As for lock-on-active, it should be used in conjunction with a ruleflow-group or agenda-group.  It's basically no-loop for the entire group, as I understand it.  I don't see either a ruleflow-group or agenda-group defined for those rules.  Did you do that?

--- On Tue, 11/11/08, techy <techluver007 at gmail.com> wrote:

> From: techy <techluver007 at gmail.com>
> Subject: [rules-users] no-loop & lock-on-active clarification
> To: rules-users at lists.jboss.org
> Date: Tuesday, November 11, 2008, 10:25 AM
> I tried following rules as given below and result 
> are:(assumes facts which
> I tried are qualified for both rules)
> 
> 1. when lock-on-active used with both rule, only rule
> "1 precondition" got
> executed for all facts.
> 2. when no-loop used with both rules, infinite loop
> 3. when lock-on-active for rule "1 precondition"
> and no-loop for rule "1
> main condition" used, both rule got fired correctly.
> 4. for vice versa of 3 scenario, only rule "1
> precondition" got executed for
> all facts. 
> Can someone please clarify about this scenario and also
> diff between no-loop
> & lock-on-active? when we should use one and when
> should not?
> I went thru documentation and still could not understand
> the difference.
> 
> public class Foo
> {
>     private Set<String> preConditionPassedRules ;
>    
>     private Integer f1;
>     private Integer f2;
>     
> }
> 
> rule "1 precondition"
> 	salience 100
>        
> 	when
> 		foo : Foo( f1 != null && f2 != null)
> 	then 
> 		foo.addPreconditionPassedRule("1
> precondition");
>                 update(foo)
> 		
> end
> 
> rule "1 main condition"
> 	salience 100
>         
> 	when
> 		foo : Foo( preconditionPassedRule contains "1
> precondition",f1 > 1000,f2 
> < 1000)
> 	then 
> 		#actions
> 		
> end
> 
> -- 
> View this message in context:
> http://www.nabble.com/no-loop---lock-on-active-clarification-tp20443036p20443036.html
> Sent from the drools - user mailing list archive at
> Nabble.com.
> 
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