Hello, there is a book at www.packtpub.com called Jboss Drools Business Rules that is on drools 5 is a good one Regards Nicolas Héron
2009/5/7 cyphr <[email protected]> > > Thanks again Nicholas! > I did make my own little sample on that, had to check the trunk to get the > newer docs... but > > yes, it appears to help my cause. > One more question - if i have to pick up Drools Rules Language and start > writing Event processing Rules, where would be good place to start ? > considering that i have very little (or no) knowledge of Rule Engines in > general? I find my self restricted, in the sense i cant express my > requirments with my limited understanding in defining Rules. > > thanks again! > Rishi > > > Nicolas Héron wrote: > > > > Hello > > You can set any attribute as the time clock > > You have to add an annotation > > It is in the fusion doc > > Sorry for my late answer but I am on holidays :) > > Regards > > Nicolas > > > > 2009/4/27 cyphr <[email protected]> > > > >> > >> Thanks Nicolas, > >> I looked into Drools-fusion over the weekend - interesting! > >> i noticed that the events are wound around the clock in the example > >> provided > >> - is that so always? > >> i would want my correlation to work with the time from timestamp that is > >> already there as part of the fact. > >> > >> Any pointers on where i can get some more reading done on drools-fusion, > >> with some more examples? > >> > >> Thanks again! > >> Rishi > >> > >> > >> Nicolas Héron wrote: > >> > > >> > Hello, > >> > have you looked at the cep part of drools ? (drools-fusion) > >> > it is exactly doing what you want with event. > >> > You add an event caracteristic on an existing fact you insert in a > >> > statefull > >> > session > >> > and you can have rules using time constraint > >> > regards > >> > Nicolas Heron > >> > > >> > 2009/4/22 cyphr <[email protected]> > >> > > >> >> > >> >> Hi, > >> >> > >> >> I have a scenario where i have: > >> >> - A listener that listens to a port and collects datapackets(Logs of > >> >> Events) as they come and dumps to a DB. > >> >> - consider the data that goes into my table is parsed, processed > >> >> (meaningful, not raw anymore). > >> >> > >> >> > >> >> Can Drools sit in between this listener and my DataBase to achieve > the > >> >> following : > >> >> > >> >> 1. Monitor the frequency of occurrence? Say if/when event 'X' occurs > >> 'n' > >> >> times in a 'z' time window? > >> >> 2. ignore event 'X' until it occurs n times. > >> >> 3. track a sequence of events - event X followed by event y within a > >> >> fixed > >> >> time window. > >> >> > >> >> (the RHS for any of these is, at the moment, not very consequential. > i > >> >> might > >> >> just raise a flag or something to indicate something has happened...) > >> >> > >> >> My query is primarily to understand if this can be achieved. > >> >> i may have around a million logs a day, but - only one event at a > time > >> is > >> >> passed from the listener to Drools. Can drools hold the knowledge of > >> >> previous facts(like count) into its working session? or does it > >> require > >> >> to > >> >> store all these facts also? > >> >> > >> >> Should i be firing the rules whenever each log/event enters my > system? > >> or > >> >> should i accumulate the day's facts ? (but i might have rules that > >> need > >> >> to > >> >> catch conditions spreading over a few days ...) > >> >> > >> >> Some pointers or suggestions on this would be great! > >> >> Thanks! > >> >> > >> >> -- > >> >> View this message in context: > >> >> > >> > http://www.nabble.com/Can-Drools-be-Used-for-this-application--tp23170278p23170278.html > >> >> Sent from the drools - user mailing list archive at Nabble.com. > >> >> > >> >> _______________________________________________ > >> >> rules-users mailing list > >> >> [email protected] > >> >> https://lists.jboss.org/mailman/listinfo/rules-users > >> >> > >> > > >> > _______________________________________________ > >> > rules-users mailing list > >> > [email protected] > >> > https://lists.jboss.org/mailman/listinfo/rules-users > >> > > >> > > >> > >> -- > >> View this message in context: > >> > http://www.nabble.com/Can-Drools-be-Used-for-this-application--tp23170278p23249692.html > >> Sent from the drools - user mailing list archive at Nabble.com. > >> > >> > >> _______________________________________________ > >> rules-users mailing list > >> [email protected] > >> https://lists.jboss.org/mailman/listinfo/rules-users > >> > > > > _______________________________________________ > > rules-users mailing list > > [email protected] > > https://lists.jboss.org/mailman/listinfo/rules-users > > > > > > -- > View this message in context: > http://www.nabble.com/Can-Drools-be-Used-for-this-application--tp23170278p23424034.html > Sent from the drools - user mailing list archive at Nabble.com. > > > _______________________________________________ > rules-users mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-users >
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