Re: [rules-users] Can Drools be Used for this application?

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 <hrishikesh.varma(a)wipro.com&gt; > >> >> 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 <hrishikesh.varma(a)wipro.com&gt; >> > >> >> >> >> 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--tp23170278... >> >> 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 >> >> >> > >> > _______________________________________________ >> > 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/Can-Drools-be-Used-for-this-application--tp23170278... >> 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 >> > > _______________________________________________ > 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/Can-Drools-be-Used-for-this-application--tp23170278... 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