Hi, On Sun, Oct 31, 2010 at 7:47 PM, Wolfgang Laun <[email protected]>wrote:
> Is there a compelling reason for discarding the system that's in use now? > Mainly due to difficulty in maintaining a hand written large amount of rules. > > It would appear that you are emulating the existing system's functions > (_psubj, > date, equality test) by some mechanism using reflection, which, in > itself, will cause some > overhead. Then, in the Drools rule, you are using eval(), which is the > least efficient way of > formulating a condition; none of the optimizations will work this way. > This kind of > transformation may result in a significant increase of execution time > (which, of course, may not hurt you if there isn't much time spent in > condition evaluation now.) > > The eval() call after then looks suspicious: is this a function you > have defined? > Not really, I think this is drools eval function. Ok, let me ask you like this, if I give you the following rule, can you write an equivalent drools rule? IF _psubj(be,$var0) ^ NOT date($var0) ^ NOT $var0=$Time THEN ^1_Existence:Entity(be,$var0) Thanks for the great help! > > > > > > 2010/10/31 Nirmal Fernando <[email protected]>: > > Hi Laun, > > > >> Consider that 5000+ is a large number. Estimate the time it'll take you > >> to transform one rule: Will you be able to spend, say, 3 months for this > >> task? > > > > We've already developed a piece of code which does this conversion. > > Following is an example. > > Can you please comment on the converted rule? whether it is a valid > drools > > rule or not? > > > > Our Rule > > IF _psubj(be,$var0) ^ NOT date($var0) ^ NOT $var0=$Time THEN > > ^1_Existence:Entity(be,$var0) > > > > Converted Drools Rule > > rule "0" > > when p: Processor( > eval(p.existence("_psubj(be,"+p.conceptVar[0]+")")) > > && eval(!p.existence("date("+p.conceptVar[0]+")")) && > > eval(!p.testVar(p.conceptVar[0],"$Time")) ) > > then > > eval(p.AppendRule(" > ^1_Existence:Entity(be,"+p.conceptVar[0]+")")); > > end > > > > > > > > Thanks. > >> > >> -W > >> > >> > >> 2010/10/31 Nirmal Fernando <[email protected]> > >>> > >>> Something like following 2 rules: > >>> > >>> # IF when($Awareness,$var0) THEN ^1_Awareness:Time($Awareness,$var0) > >>> # IF $relTime($Awareness,$Time) THEN > ^1_Awareness:Time($Awareness,$Time) > >>> > >>> thanks. > >>> > >>> 2010/10/31 Wolfgang Laun <[email protected]> > >>>> > >>>> What, exactly, do you mean by "hand written"? Java statements? Another > >>>> Rule System? > >>>> Can you provide a sample? > >>>> > >>>> > >>>> 2010/10/31 Nirmal Fernando <[email protected]> > >>>>> > >>>>> Hi, > >>>>> > >>>>> I am having a 5000+ hand written rules which is used in an open > source > >>>>> project. > >>>>> I am searching for the reasons, me to be shifted to a rule engine > like > >>>>> Drools, instead of using hand written once. > >>>>> Drools rules can be debugged that will be a plus point, isn't it? I > >>>>> would love to get a list of benefits that I will be getting. > >>>>> > >>>>> Thanks. > >>>>> > >>>>> -- > >>>>> Best Regards, > >>>>> Nirmal > >>>>> > >>>>> C.S.Nirmal J. Fernando > >>>>> Department of Computer Science & Engineering, > >>>>> Faculty of Engineering, > >>>>> University of Moratuwa, > >>>>> Sri Lanka. > >>>>> Blog: http://nirmalfdo.blogspot.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 > >>>> > >>> > >>> > >>> > >>> -- > >>> Best Regards, > >>> Nirmal > >>> > >>> C.S.Nirmal J. Fernando > >>> Department of Computer Science & Engineering, > >>> Faculty of Engineering, > >>> University of Moratuwa, > >>> Sri Lanka. > >>> Blog: http://nirmalfdo.blogspot.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 > >> > > > > > > > > > > -- > > Best Regards, > > Nirmal > > > > C.S.Nirmal J. Fernando > > Department of Computer Science & Engineering, > > Faculty of Engineering, > > University of Moratuwa, > > Sri Lanka. > > Blog: http://nirmalfdo.blogspot.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 > -- Best Regards, Nirmal C.S.Nirmal J. Fernando Department of Computer Science & Engineering, Faculty of Engineering, University of Moratuwa, Sri Lanka. Blog: http://nirmalfdo.blogspot.com/
_______________________________________________ rules-users mailing list [email protected] https://lists.jboss.org/mailman/listinfo/rules-users
