Hi, Trying to get to grips with Fusion and absence of events... If I have a Bean that has just a simple variable, e.g. class MyBean { private String name; getter+setter } I want to use events to determine when an object with name=="one" is available, and no object with name=="two" appears within 10 seconds.. So, I write a rule: declare MyBean @role( event) end rule "myrule' when $a : MyBean(name=="one"); not( MyBean(name=="two", this after [0s,10s] $a)) then //do something end If I inject an object with Name="one", and then wait 10seconds, I get the 'myrule' fired, great! But, if i inject an object with name="one" and then 1second later I inject an object with name="other" the 'myrule' is fired.. Looking at the manual, this seems kind of correct, the rule says if I have a "one" and not a bean with name=="two" which I do, as I have a 'one' and a 'other' But, how do I write the rule to say, I have a 'one' and 'two' doesn't turn up? Cheers Ric _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Thanks, it turns out my email post was correct and my code i was testing with with different.. If I do, $a : MyBean(name=="one"); not( MyBean(name=="two", this after [0s,10s] $a)) which means, item not received between 0 and 10 seconds then it works as expected.. If I do $a : MyBean(name=="one"); not( MyBean(name=="two", this after [10s] $a)) which means, item not received between 10 and infinity seconds then I get the false rule trigger when name==other inserted Need to get my head around that one. Edson Tirelli-4 wrote: > > Richard, > > It depends on which mode you are running the engine (STREAM or CLOUD) > and in case you are using STREAM, which clock are you using. > > If you are using CLOUD, Drools assumes all facts/events are available, > and does not wait to fire the activation. > > If you are using STREAM mode, then Drools will delay the firing of the > rule with a temporal negative pattern for the necessary time (10s in your > case) and if after that time the rule is still active, it will fire it. > The > type of session clock you use, obviously influences the flow of time, > where > the 10s might be real time, or pseudo time controlled by the application. > > The way the rule is written is consistent with the intent you > described > in your e-mail, so my guess is that you might be using different > configurations as described above. > > []s > Edson > > 2009/10/28 Richard Ambridge <Richard.Ambridge(a)sun.com&gt; > >> Hi, >> Trying to get to grips with Fusion and absence of events... >> >> If I have a Bean that has just a simple variable, e.g. class >> MyBean { private String name; getter+setter } >> >> I want to use events to determine when an object with name=="one" >> is available, and no object with name=="two" appears within 10 seconds.. >> >> So, I write a rule: >> >> declare MyBean >> @role( event) >> end >> >> rule "myrule' >> when >> $a : MyBean(name=="one"); >> not( MyBean(name=="two", this after [0s,10s] $a)) >> then >> //do something >> end >> >> >> If I inject an object with Name="one", and then wait 10seconds, I >> get the 'myrule' fired, great! >> >> But, if i inject an object with name="one" and then 1second later I >> inject an object with name="other" >> the 'myrule' is fired.. >> >> Looking at the manual, this seems kind of correct, the rule says if >> I have a "one" and not a bean with name=="two" >> which I do, as I have a 'one' and a 'other' >> >> But, how do I write the rule to say, I have a 'one' and 'two' doesn't >> turn up? >> >> Cheers >> Ric >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> > > > > -- > Edson Tirelli > JBoss Drools Core Development > JBoss by Red Hat @ www.jboss.com > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- View this message in context: http://www.nabble.com/Drools-fusion-and-absence-of-events-tp26093460p2609... Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users