Hy, I would also be interested in having a timer working with variables. In my case I need to have a rule that fires when an event is detected inside a certain interval of time (say 22h-07h in a day), and this interval should be configurable at runtime. I tried using a global value but I get an "Unable to build set timer" error. Another way to do this I guess would be to put a timestamp attribute in my event class and check if the value is inside the interval but I was looking forward to using the functionality of the cron timer.. Would it be possible to use domain specific language parameters {} in the timer? It would really be helpful to be able to use some sort of variable since the whole idea behind my application is to allow the users to set values in the rules without having to directly modify the .drl file. If there are better ideas out there I'm open to suggestions since I'm just starting with Drools and Fusion. Regards -- View this message in context: http://drools.46999.n3.nabble.com/rules-users-Rules-with-variable-timers-... Sent from the Drools: User forum mailing list archive at Nabble.com.

Hy, Thank you very much for your response, I will definitely think about using declared types for user input. I'm not exactly sure I understood how the attributes of UserParameter are set from outside the rule file in the code you posted. I found that in the documentation in section 5.7.6. "Accessing Declared Types from the Application Code" it is stated that these types are generated at knowledge base compilation time. Would it be necessary to create a new knowledge session each time these values are modified or can a previously created session be used? Lastly, I assume that the timer still has to be created with constant values and there is no way around that. I will be testing the declared type functionality myself to see how it works but any response I get is greatly appreciated. Thank you for your time! Regards -- View this message in context: http://drools.46999.n3.nabble.com/rules-users-Rules-with-variable-timers-... Sent from the Drools: User forum mailing list archive at Nabble.com.

Thank you for the detailed response and clarifications. I agree that using a timer for my purpose is not the best idea and am going to try and make use of event timestamps and then check these values inside the rules. I understand that by default the timestamp for a given event is read from the Session Clock and assigned to the event at the time the event is inserted into the working memory. Is there any way to access these values from inside the .drl file or do I have to set my own values using the @timestamp in order to have such access? As a possible solution I tried setting a timestamp attribute inside an event at creation time, with a value taken from the session clock. in .drl file : declare StateEvent @role(event) @timestamp(timestamp) end in java code : SessionClock clock = ksession.getSessionClock(); entryPoint.insert(new StateEvent(motionSensor, clock.getCurrentTime())); I am doing this in order to have real and pseudo clock functionality for testing, switching between the two while using almost the same code (calling advanceTime method for the pseudo clock is basically the only difference). It serves my purpose but I was wondering if such an implementation could have unwanted consequences that I am overlooking. Regards -- View this message in context: http://drools.46999.n3.nabble.com/rules-users-Rules-with-variable-timers-... Sent from the Drools: User forum mailing list archive at Nabble.com.