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

[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

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