[rules-users] How to activate/deactivate a rule.

[Michael Anstis]

Am I correct in thinking you want to calculate the sum of groups of ABC.C's
differentiated by ABC.A?

An activation for the third rule is being created each time an ABC is
inserted into WM. First with one ABC, then with two and so fourth.

What you want is to ensure that "processing" for rules 1 and 2 complete
first and then rule 3 works on the results in WM. This can be achieved with
salience on the three rules; lower on rule 3 than 1 and 2 to ensure it's
activations execute after rules 1 and 2 are finished operating on all facts.

2010/9/17 <Ritesh.khot at sungard.com>

>  Hi,
>
> Thanks for the reply..
>
>
>
> --The sequential option is set to *false*
>
> --Using  *StatelessKnowledgeSession*
>
> * *
>
> Summary what I intend to achieve,
>
>    1. In first rule, I am doing calculation on three different columns and
>    putting it in *sumOfThree *property of ActualSum and inserting it in
>    WM. Let say I have four facts.
>    2. In Second Rule, I am inserting distinct audit trail in DistinctAT.
>    Lets say I have two distinct AT.
>    3. In Third Rule, I am assuming 4 Facts of ActualSum and 2 Facts of
>    DistinctAT already available in WM. Now I want to get sum of sumOfThree
>    group by AT, which I am trying to get using Accumulate function.
>
>
>
> *OutPut I am getting:*
>
> AT :1001
>
> Done!
>
> Done Main Rule, total :-40.0
>
> AT :1000
>
> Done!
>
> Done Main Rule, total :210.0
>
> AT :1000
>
> Done Main Rule, total :160.0
>
> AT :1000
>
> Done Main Rule, total :260.0
>
>
>
> INFO: Number of generated exceptions                       4
>
>
>
> Here I see the last rule is getting fired every time ActualSum fact is
> inserted in first rule. And as the facts are available one by one, these are
> available to Accumulate function used in third Rule. Actually I am expecting
> only two exceptions one for AT:1001 and AT:1000 with total of -40 and 260
> resp.
>
>
>
> Please advise.
>
>
>
> P.S.  Please ignore “$lfna_SEI and $r_SE”.
>
>
>
>
>
> Thanks,
>
> Ritesh
>  ------------------------------
>
> *From:* rules-users-bounces at lists.jboss.org [mailto:
> rules-users-bounces at lists.jboss.org] *On Behalf Of *Michael Anstis
> *Sent:* Friday, September 17, 2010 12:43 PM
> *To:* Rules Users List
> *Subject:* Re: [rules-users] How to activate/deactivate a rule.
>
>
>
> Have you tried running what you have?
>
>
>
> I'd expect it to give the result you expect already (other than throwing an
> error because $lfna_SEI and $r_SE are not bound in the last rule and
> assuming chkRuleExpre is constant over time). Rules do not normally execute
> in any sequential order (unless you explicitly make them so). As the facts
> are inserted into WM they are matched against your rules and activations
> scheduled. When all facts are inserted into WM and you call fireAllRules the
> activations are played out and "truth maintenance" ensures the "result" of
> their firing is consistent with the facts in WM (either inserted by rules or
> the programmer). This is in essence "how inference engines" work.
>
>
>
> After you've called fireAllRules (and assuming you have a stateful session)
> you insert more ABC's then you'd have to expect the last rule to be
> re-evaluated - following another call to fireAllRules. So in part when rule
> 3 ultimately gives the "correct" answer depends upon when you stop inserting
> ABC's.
>
>
>
> On 17 September 2010 07:35, Ritesh <ritesh.khot at sungard.com> wrote:
>
>
> Hi,
>
> I have 3 rules in my drl file and want the last one should get fired only
> after all the facts in rule1 and rule2 gets inserted in working memory.
> Please see below code for more understanding. Please suggest.
>
> Thanks
>
> declare DistinctAT
>     d_auditT : String
> end
>
> declare ActualSum
>     auditT : String
>     sumOfThree : BigDecimal
> end
>
> rule "insert combined sum"
>        dialect 'java'
> when
>    ABC( $a:A, $b:B, $c:C )
>
> then
>        BigDecimal actSum = $c.multiply(0.13);
>        ActualSum $as = new ActualSum();
>        $as.setAuditT($a);
>        $as.setSumOfThree(actSum);
>        insert($as);
>        System.out.println("AT :" + $movAuditT);
> end
>
> rule "insert distinct AT"
>
>        dialect 'java'
> when
>    $a : ActualSum( $AT : auditT )
>        not DistinctAT( d_auditT == $AT )
> then
>        DistinctAT $disAT = new DistinctAT();
>        $disAT.setD_auditT($AT);
>        insert($disAT);
>        System.out.println("Done!");
> end
>
> rule "Get Sum Group by AT"
>
>        dialect 'java'
> when
>
> DistinctAT( $dAT: d_auditT )
>
> $total : Double()
> from accumulate( ActualSum( auditT == $dAT, $actSum_Main : sumOfThree ),
> sum( $actSum_Main ) )
>
> eval(
>        chkRuleExpre( $total,$lfna_SEI,$r_SEI )
> )
>
> then
>        System.out.println("Done Main Rule, total :" + $total);
> end
>
> --
> View this message in context:
> http://drools-java-rules-engine.46999.n3.nabble.com/How-to-activate-deactivate-a-rule-tp1516088p1516088.html
> Sent from the Drools - User mailing list archive at Nabble.com.
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