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 rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

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 <wolfgang.laun(a)gmail.com&gt; What, exactly, do you mean by "hand written"? Java statements? Another Rule > System? > Can you provide a sample? > > > 2010/10/31 Nirmal Fernando <nirmal070125(a)gmail.com&gt; > >> 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 >> 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 > > -- 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 rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

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 <nirmal070125(a)gmail.com&gt; >> >> 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 <wolfgang.laun(a)gmail.com&gt; >>> >>> What, exactly, do you mean by "hand written"? Java statements? Another >>> Rule System? >>> Can you provide a sample? >>> >>> >>> 2010/10/31 Nirmal Fernando <nirmal070125(a)gmail.com&gt; >>>> >>>> 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 >>>> 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 >>> >> >> >> >> -- >> 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 >> 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 > -- 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 rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Hi, On Sun, Oct 31, 2010 at 7:47 PM, Wolfgang Laun <wolfgang.laun(a)gmail.com&gt; 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 <nirmal070125(a)gmail.com&gt;: > > 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 <nirmal070125(a)gmail.com&gt; > >>> > >>> 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 <wolfgang.laun(a)gmail.com&gt; > >>>> > >>>> What, exactly, do you mean by "hand written"? Java statements? > >>>> Another > >>>> Rule System? > >>>> Can you provide a sample? > >>>> > >>>> > >>>> 2010/10/31 Nirmal Fernando <nirmal070125(a)gmail.com&gt; > >>>>> > >>>>> 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 > >>>>> 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 > >>>> > >>> > >>> > >>> > >>> -- > >>> 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 > >>> 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 > >> > > > > > > > > > > -- > > 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 > > 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 -- 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 rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users