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

[Nicolas Héron]

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 <hrishikesh.varma at wipro.com>

>
> 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 at wipro.com>
> >
> >>
> >> 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 at wipro.com>
> >> >
> >> >>
> >> >> 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.
> >> >>
> >> >> _______________________________________________
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> >> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >> >>
> >> >
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> >> >
> >>
> >> --
> >> 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.
> >>
> >>
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> >
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>
> --
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> http://www.nabble.com/Can-Drools-be-Used-for-this-application--tp23170278p23424034.html
> Sent from the drools - user mailing list archive at Nabble.com.
>
>
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