<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Actually I think you do not need to call update at all.</DIV>
<DIV>The object model has been modified, it is just that you will not trigger a deletion-reinsertion into the Working Memory. However the client that inserted the object model initially will be able to see the new value of the field message. Not calling update, you do not have to worry about any of the rules being executed again.</DIV>
<DIV>The only thing I do not understand here is, if you want your rules to overwrite the message that was potentially changed by a rule that was previously executed. Because this is what is going to happen with the way the rules are right now. </DIV>
<DIV>Or maybe you want them to accumulate, so that after all rules ran, the client has a list of all messages.</DIV>
<DIV><BR><BR>--- On <B>Thu, 1/15/09, rules-dev-request@lists.jboss.org <I><rules-dev-request@lists.jboss.org></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid">From: rules-dev-request@lists.jboss.org <rules-dev-request@lists.jboss.org><BR>Subject: rules-dev Digest, Vol 25, Issue 8<BR>To: rules-dev@lists.jboss.org<BR>Date: Thursday, January 15, 2009, 11:00 AM<BR><BR><PRE>Send rules-dev mailing list submissions to
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Today's Topics:
1. Need to Exit from DRL without using drools.halt()
(Sarath Kumar Daruru)
2. RE: Need to Exit from DRL without using drools.halt()
(Anstis, Michael (M.))
----------------------------------------------------------------------
Message: 1
Date: Thu, 15 Jan 2009 15:36:06 +0530
From: Sarath Kumar Daruru <sarathd@blueally.com>
Subject: [rules-dev] Need to Exit from DRL without using drools.halt()
To: "'rules-dev@lists.jboss.org'"
<rules-dev@lists.jboss.org>
Message-ID:
<73C89FCA1CA6C14E9DFC31575B11F7813287F10EEC@MSHBACLMX.blueally.org>
Content-Type: text/plain; charset="us-ascii"
Hi All,
I have small doubt in the DRL file execution. I have developing the small
Claims application. I have 4 rules in my application. Below are the rules I have
declared in the drl file based on the rules.
Claims.drl
rule "Amount Validation-Rule1"
when
$c : Claims(amount >= ( maxClaimAmount) )
then
$c.setMessage ( "The total amount claimed exceeds the maximum
permitted by the
Policy" );
update($c);
end
rule "Expired Policy-Rule2"
when
$c : Claims( currentDate > ( policyExpireDate ))
then
$c.setMessage( "Your Policy has been expired" );
update($c);
end
rule "Feature Date-Rule3"
when
$c : Claims( claimDate >= ( currentDate ) )
then
$c.setMessage( "Rejecting the claim because the date on the
claim is in the future" );
update($c);
end
and my java class is
Claims.java
// Setting the values to Claims object
Claims rule = new Claims ();
rule.setAmount(amount);
rule.setClaimsHospitalStayeddays(claimsHospitalStayeddays);
rule.setClaimDate(claimDate);
rule.setCurrentDate(currentDate);
rule.setDaysPermitted(daysPermitted);
rule.setPolicyExpireDate(policyExpireDate);
rule.setCurrentDate(currentDate);
rule.setMaxClaimAmount(maxClaimAmount);
StatefulSession workingMemory = ruleBase.newStatefulSession();
workingMemory.insert(rule);
workingMemory.fireAllRules();
If my first rule is fails then it is displaining in the messaege I managed to
get that value in my java class. If the condition is not satisfied then is fell
into the infinte loop. Again and again it is calling, not coming from that loop.
If I keep the drools.halt(); at the end of the rule then it is executing.
My question - Is there any alternate method is there to come out from infinte
loop without using drools.halt(); method? Why it is fell into the infinite loop?
Thanks,
Sarath Kumar Daruru
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Message: 2
Date: Thu, 15 Jan 2009 10:44:27 -0000
From: "Anstis, Michael (M.)" <manstis1@ford.com>
Subject: RE: [rules-dev] Need to Exit from DRL without using
drools.halt()
To: "Rules Dev List" <rules-dev@lists.jboss.org>
Message-ID:
<C7774483B6A70C4BB10E917CC1A59DC11BCAEE@eu1wam35.warley.ford.com>
Content-Type: text/plain; charset="us-ascii"
You could simply add a "processed" flag and change your rules...
rule "Amount Validation-Rule1"
when
$c : Claims(amount >= ( maxClaimAmount), processed = false )
then
$c.setMessage ( "The total amount claimed exceeds the maximum
permitted by the Policy" );
$c.setProcessed(true);
update($c);
end
Otherwise the updates are causing the fact to be re-accessed by the RETE
network.
Alternatively you could use a ClaimOutcome object...
rule "Amount Validation-Rule1"
when
$c : Claims(amount >= ( maxClaimAmount))
not ClaimOutcome(claim = $c)
then
ClaimOutcome co = new ClaimOutcome($c, "The total amount claimed
exceeds the maximum permitted by the Policy" );
insert(co);
end
With kind regards,
Mike
________________________________
From: rules-dev-bounces@lists.jboss.org
[mailto:rules-dev-bounces@lists.jboss.org] On Behalf Of Sarath Kumar
Daruru
Sent: 15 January 2009 10:06
To: 'rules-dev@lists.jboss.org'
Subject: [rules-dev] Need to Exit from DRL without using
drools.halt()
Hi All,
I have small doubt in the DRL file execution. I have developing
the small Claims application. I have 4 rules in my application. Below
are the rules I have declared in the drl file based on the rules.
Claims.drl
rule "Amount Validation-Rule1"
when
$c : Claims(amount >= ( maxClaimAmount) )
then
$c.setMessage ( "The total amount claimed exceeds
the maximum permitted by the
Policy" );
update($c);
end
rule "Expired Policy-Rule2"
when
$c : Claims( currentDate > ( policyExpireDate ))
then
$c.setMessage( "Your Policy has been expired" );
update($c);
end
rule "Feature Date-Rule3"
when
$c : Claims( claimDate >= ( currentDate ) )
then
$c.setMessage( "Rejecting the claim because the
date on the claim is in the future" );
update($c);
end
and my java class is
Claims.java
// Setting the values to Claims object
Claims rule = new Claims ();
rule.setAmount(amount);
rule.setClaimsHospitalStayeddays(claimsHospitalStayeddays);
rule.setClaimDate(claimDate);
rule.setCurrentDate(currentDate);
rule.setDaysPermitted(daysPermitted);
rule.setPolicyExpireDate(policyExpireDate);
rule.setCurrentDate(currentDate);
rule.setMaxClaimAmount(maxClaimAmount);
StatefulSession workingMemory = ruleBase.newStatefulSession();
workingMemory.insert(rule);
workingMemory.fireAllRules();
If my first rule is fails then it is displaining in the messaege
I managed to get that value in my java class. If the condition is not
satisfied then is fell into the infinte loop. Again and again it is
calling, not coming from that loop. If I keep the drools.halt(); at the
end of the rule then it is executing.
My question - Is there any alternate method is there to come out
from infinte loop without using drools.halt(); method? Why it is fell
into the infinite loop?
Thanks,
Sarath Kumar Daruru
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</PRE></BLOCKQUOTE></td></tr></table>