[rules-users] Check the condition is TRUE during a period of time

[Shyam, Pallav (MSCIBARRA)]

Here is how you can achieve this:

rule "Init"
	salience 10
	when	
		exists FactObject(condition != true)
	then
		insertLogical(new Stop())
end

 rule "Your Business rule"
	when
		not Stop()
		//some other conditions that you want to check
	then
		//action
end
	


-----Original Message-----
From: rules-users-bounces at lists.jboss.org
[mailto:rules-users-bounces at lists.jboss.org] On Behalf Of ganesh.p
Sent: Tuesday, September 02, 2008 7:32 PM
To: rules-users at lists.jboss.org
Subject: [rules-users] Check the condition is TRUE during a period of
time


Hi All,

I want to write a rule which should fire only when the condition is true
for all the facts asserted during a period of time.

E.g.: 

rule "rule1" duration 30000
when TxInfo(txTime > 100)  // for 30 seconds then //some action end


I tried using "duration" attribute, but once the rule is activated, it
fires rule when the last fact match the condition during the 30 seconds
duration. 
It looks like, once the first fact matches the condition then it starts
a 30 seconds timer, once the 30 seconds complete if the last fact match
the condition then it fires the rule. It ignores the intermediate facts
during the 30 seconds duration.

Suppose the facts(TxInfo.txTime) are

20, 40, 105[Activation], 115, 120, 4, 110[Last fact matches the
condition, so fires the rule] 20, 40, 105[Activation], 115, 120, 110,
4[Last fact doesn't match the condition, so doesn't fire the rule]

I want the rule shouldn't fire in the both the above cases. 
How can we check the condition is TRUE for 30 seconds duration for all
the facts asserted during this time?

Thanks in advance,
Ganesh
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