A window:length is filled depending on the constraints but independent of how old the participating facts are.

What you want to achieve can be done without windows: t2_1 : Tick( value < 102.352 ) t1_1 : Tick( this before t2_1 , value >= 102.352 ) not Tick( this before t2_1 && after t1_1 ) The last pattern ascertains that the preceding pair of facts is adjacent. (The three timestamps should be different.) You can also use rules based on an auxiliary fact maintaining state: While value < 102.352, state is set to "below"; as soon as a fact with value >= 102.352 matches state == "below", the threshold is passed and state is set to "above"... -W On 02/05/2014, Demian Calcaprina <calcacuervo(a)gmail.com&gt; wrote: > Hi Guys, I have one question about how lenght windows will work. > > I have a rule like this. Basically, it is a "crosses" function, where the > value of my object crosses a value. > > rule "mytest" > dialect "mvel" > when > t2_1 : Tick( value < 102.352 ) over window:length (1) > t1_1 : Tick( this before t2_1 , value >= 102.352 ) over window:length (2) > then > //DO SOMETHING > end > > 23:51:32,150 INFO [org.drools.core.audit.WorkingMemoryConsoleLogger] > (Camel (camel-1) thread #2 - JmsConsumer[]) ACTIVATION FIRED rule:mytest > activationId:berarrr_1 [0, 27, 26] declarations: t2_1=Tick [value=102.351, > tickTime=Fri May 02 05:51:31 ART 2014](27); t1_1=Tick [value=102.352, > tickTime=Fri May 02 05:51:12 ART 2014](26) > > 23:53:30,560 INFO [org.drools.core.audit.WorkingMemoryConsoleLogger] > (Camel (camel-1) thread #2 - JmsConsumer[]) ACTIVATION CREATED rule:mytest > activationId:berarrr_1 [0, 146, 26] declarations: t2_1=Tick [value=102.349, > tickTime=Fri May 02 05:53:30 ART 2014](146); t1_1=Tick [value=102.352, > tickTime=Fri May 02 05:51:12 ART 2014](26) > > If you see, the first activation, the > window:length(1), matched the object 27 > window:length(2), matched the object 26 > > Then, after 2 minutes and some Ticks insertes in the WM > window:length(1), matched the object 146 > but window:length(2), still matched the object 26 > > I would expect, that, as object 26 was the first one to be inserted, then > it is outside the window:length(2). > > Is my understanding correct? Am I making something wrong? I am using Drools > 6. > > Thanks! > > Demian > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users