[rules-users] RE: firing specific rule

[Mark Proctor]

please create a JIRA with the suggested changes.

Mark
Manukyan, Sergey wrote:
> Ok folks, the issue was resolved, thanks everyone for their valuable
> inputs.
>
> Here is what I have found out:
>
> 1. The manual for 4.0.2 is incorrectly stating that
> RuleNameEndsWithAgendaFilter("Test") filters OUT the rules. It actually
> filters IN..
>
> The interface AgendaFilter contains method : 
> 	
> public boolean accept(final Activation activation);
>
> so when it returns true - the Activation IS accepted.
>
> The implementations class RuleNameEndsWithAgendaFilter("Test") of that
> interface has method, which returns true when
>
>  activation.getRule().getName().endsWith( "Test" )
>
> So activations of rules that end on "Test" ARE accepted.
>
> Documentation manual needs to be corrected and it would probably be
> beneficial to add section to it describing AgendaFilter interface.
>
> 2. When using rule flow file like in my example:
>
> START -> Initialization -> Validation -> END
>
> And using RuleNameEndsWithAgendaFilter("My Rule Name") which had
> "Validation" ruleflow group - never fired because NONE of the
> activations were permitted on Initialization part, it choked execution
> of the Activations on the Validation part.
>
> The resolution was when I created a custom agenda filter :
>
> new AgendaFilter () {
>
> 	public boolean accept(Activation activation) {
>
> 		if (activation.getRule().getName().equals("My Rule
> Name")
> 			||
> !activation.getRule().getRuleFlowGroup().equals(
> 						"Validation")) {
> 			return true;
> 		} else {
> 			return false;
> 		}
> 	}	
> }
>
> It allowed to fire all rules in ruleflow group other then Validation and
> then proceeded to Validation and fired that particular validation rule I
> was looking for. (thanks to Kris for the advice)
>
> -Sergey
>
>
>
> -----Original Message-----
> From: rules-users-bounces at lists.jboss.org
> [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Matt Geis
> Sent: Thursday, October 18, 2007 1:02 PM
> To: rules-users at lists.jboss.org
> Subject: [rules-users] RE: firing specific rule
>
> I ran into this unexpected behavior as well.  I took a look at the
> Drools source and found that the rule filters filter out rules that MEET
> the criteria (unlike the java Filename Filter, which filters out those
> that do NOT meet the criteria.
>
> So, if you want to run a VERY specific rule, you could create something
> like RuleNameNotEqualsFilter, and that would ensure that all rules
> except the one you want to fire have no chance of firing.
>
> Then, of course, you would want to make sure that the facts you assert
> meet the conditions you've set up in the LHS of the rule.
>
> Matt
>
>
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