[rules-users] Best design pattern for: Set of events with countdown timers?

[Vincent LEGENDRE]

did you check here : http://drools.46999.n3.nabble.com/please-provide-a-rule-for-events-timeout-cases-td3907955.html 

----- Mail original -----

De: "dunnlow" <dunnlow at yahoo.com> 
À: rules-users at lists.jboss.org 
Envoyé: Vendredi 10 Août 2012 16:19:33 
Objet: [rules-users] Best design pattern for: Set of events with countdown timers? 

Hi, 

I am receiving events from a group of about 15 different event producers - 
each with different names (located in the message). I want to make sure 
that I get at least one event from each of those 15 producers within a 
pre-determined period of time; the period can be different for each 
producer. 

I am planning to use a template rule to relate producer name to time period. 
Then, I'll insert a "myTimoutObject" for each producer (not quite sure yet 
where/how I'll do that) which will count down from the provided time period 
and trigger an "alert" condition if they reach zero (and reset whenever a 
new event from that producer arrives into the ksession). 

Does anyone have experience with a better way to implement this count-down 
pattern? 

Thanks for any insight, 
-J 



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