Thank you so much… earlier I tried with both as below for each rule with different salience values… but it was generating 4 exception as I mentioned in my last email.

agenda-group "init"

auto-focus true

no-loop true

salience 10

dialect 'java'

Now I am just using :

Rule 1

salience 100

dialect 'java'

Rule 2

salience 50

dialect 'java'

Rule 3

salience -1

dialect 'java'

This is working just fine.

Thanks a lot..

Ritesh

From: Michael Anstis-2 [via Drools - Java Rules Engine] [mailto:[hidden email]]
Sent: Friday, September 17, 2010 4:46 PM
To: Khot, Ritesh
Subject: Re: How to activate/deactivate a rule.

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 <[hidden email]>

Hi,

Thanks for the reply..

--The sequential option is set to false

--Using StatelessKnowledgeSession

Summary what I intend to achieve,

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.
In Second Rule, I am inserting distinct audit trail in DistinctAT. Lets say I have two distinct AT.
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: [hidden email] [mailto:[hidden email]] 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 <[hidden email]> 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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