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

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