[rules-users] Convert logic to DRL rules
Bill Zhang
billzhang2006 at gmail.com
Mon Feb 19 09:13:32 EST 2007
Hi Alex,
Thank you for confirming this. Writing such a builder may take us a
lot of time because our business user is used to free style
Pascal-like authoring using quite complex logic. For example,
IF
(
(
(Person.Age > 35 OR Person.Age < 25) AND
(Person.ZipCode =23546 or Person.ZipCode = 68590)
)
and
(
(Person.LastOrderPrice > 300 OR
(Person.TotalOrderNumber > 2)
)
)
OR
(
(
(Person.LastOrderCategory in ("098", "109") ) AND
(Person.ZipCode =74567 or Person.ZipCode = 23765)
)
and
(
(Person.LastOrderPrice > 1000 OR
(Person.TotalOrderNumber > 1)
)
)
...
THEN Person.Status = "KT";
Before I set out to write the builder, I would like to know whether
the new syntax can handle the above logic? Also, where can I find
document for the new syntax?
I am also trying to find some existing open source Java library to
"flatten out" these complex logic - to break these complex logic to
atomic ones that can be handled by Drools. Do you have any
recommendation?
Thanks a lot for your help.
Bill Y.
On 2/19/07, Alexander Varakin <avarakin at optonline.net> wrote:
> We built a Rule Builder which creates drl with all possible
> combinations. In any case, drl syntax is not exactly business user
> friendly, so having such builder is not a bad idea.
> Simple Rule Builder can be implemented as an Excel spreadsheet, which
> can be easily parsed using POI library and then drl file produced.
>
> Steven Williams wrote:
> > Hi Bill,
> >
> > To implement your rules in 3.0.5 you would need to implement a rule
> > for each combination of age and zipCode.
> >
> > $a : Person(age > 35 zipCode == 23546)
> > then
> > $a.setStatus("KT");
> >
> > $a : Person(age < 25, zipCode == 23546 )
> > then
> > $a.setStatus("KT");
> >
> > $a : Person(age > 35, zipCode == 68590)
> > then
> > $a.setStatus("KT");
> >
> > etc..
> >
> > Steve
> >
> > On 2/19/07, *Bill Zhang* <billzhang2006 at gmail.com
> > <mailto:billzhang2006 at gmail.com>> wrote:
> >
> > So Alex, if I only want to use the old syntax that is in production,
> > there is no way to implement my seemingly simple logic conditioning?
> >
> > Thanks for your help.
> >
> > On 2/18/07, Alexander Varakin < avarakin at optonline.net
> > <mailto:avarakin at optonline.net>> wrote:
> > > As far as I know this syntax is new and is available in SVN
> > only, you
> > > will have to wait till 3.1 is released or take source from SVN
> > and build it.
> > >
> > > Bill Zhang wrote:
> > > > Hi Steven,
> > > >
> > > > Thank you very much for your help. Really appreciate.
> > > >
> > > > I still got the same error, Unexpected token '|'. I did not
> > see "|" in
> > > > the document, only saw "||", which is supposed to be used with
> > > > columns.
> > > >
> > > > Ye
> > > >
> > > > On 2/18/07, Steven Williams < stevenw at objectconsulting.com.au
> > <mailto:stevenw at objectconsulting.com.au>> wrote:
> > > >> Hi Bill,
> > > >>
> > > >> I think it should be:
> > > >>
> > > >> $a : Person(age > 35 | < 25, zipCode == 23546 | == 68590)
> > > >>
> > > >> Edson, Mark or Michael can probably confirm or correct the
> > above syntax.
> > > >>
> > > >> Make sure you are running of the latest trunk.
> > > >>
> > > >> cheers
> > > >> Steve
> > > >>
> > > >>
> > > >> On 2/18/07, Bill Zhang <billzhang2006 at gmail.com
> > <mailto:billzhang2006 at gmail.com>> wrote:
> > > >> >
> > > >> > I tried:
> > > >> >
> > > >> > $a : Person(age > 35 || age < 25, zipCode == 23546 || == 68590)
> > > >> >
> > > >> > Errors:
> > > >> > org.drools.rule.InvalidRulePackage : unknown:39:30
> > > >> Unexpected token '||'
> > > >> > unknown:39:40 mismatched token:
> > > >> [@246,1040:1041='<=',<47>,39:40];
> > > >> > expecting type '('
> > > >> > unknown:39:92 mismatched token:
> > > >> [@258,1092:1092='<',<46>,39:92];
> > > >> > expecting type '('
> > > >> >
> > > >> > I also tried
> > > >> >
> > > >> > $a : Person(age > 35 | age < 25, zipCode == 23546 | == 68590)
> > > >> >
> > > >> > Pretty much the same error.
> > > >> >
> > > >> > Based on the document, "||" is only valid for columns...
> > > >> >
> > > >> >
> > > >> > On 2/17/07, Bill Zhang <billzhang2006 at gmail.com
> > <mailto:billzhang2006 at gmail.com>> wrote:
> > > >> > > Thank you Steve. But I got syntax error using the following.
> > > >> > >
> > > >> > > On 2/17/07, Steven Williams
> > <stevenw at objectconsulting.com.au
> > <mailto:stevenw at objectconsulting.com.au>> wrote:
> > > >> > > > In trunk I think you can use connective constraints:
> > > >> > > >
> > > >> > > > $a : Person(age > 35 | < 25, zipCode == 23546 | == 68590)
> > > >> > > > then
> > > >> > > > $a.setStatus("KT");
> > > >> > > >
> > > >> > > >
> > > >> > > >
> > > >> > > >
> > > >> > > > On 2/18/07, Bill Zhang < billzhang2006 at gmail.com
> > <mailto:billzhang2006 at gmail.com>> wrote:
> > > >> > > > >
> > > >> > > > > Hello,
> > > >> > > > >
> > > >> > > > > I am a new Drools user trying to convert the
> > following simple
> > > >> logic
> > > >> into
> > > >> > > > DRL:
> > > >> > > > >
> > > >> > > > > IF (Person.Age > 35 OR Person.Age < 25) AND
> > (Person.ZipCode =
> > > >> 23546
> > > >> or
> > > >> > > > > Person.ZipCode = 68590)
> > > >> > > > > THEN
> > > >> > > > > Person.Status = "KT";
> > > >> > > > >
> > > >> > > > > I found that it is not easy to convert the above
> > logic into
> > > >> ONE DRL
> > > >> rule.
> > > >> > > > >
> > > >> > > > > I tried something like this
> > > >> > > > >
> > > >> > > > > when
> > > >> > > > > $a: Person(age>35) or Person (age<25)
> > > >> > > > > $b: Person(Zipcode==23456) or Person (ZipCode == 68590)
> > > >> > > > > $c: $a and $b
> > > >> > > > > Then
> > > >> > > > > $c.setStatus("KT")
> > > >> > > > >
> > > >> > > > > But looks like I can not use
> > > >> > > > > $c: $a and $b
> > > >> > > > > becaue in Drools, you can only bind variable to
> > column, not
> > > >> to other
> > > >> > > > varaibles.
> > > >> > > > >
> > > >> > > > > Please advise how to do this. I would imagine this
> > should be
> > > >> quite
> > > >> > > > > simple, maybe I missed something quite obvious.
> > > >> > > > >
> > > >> > > > > I know that I can write custom Java method to do
> > this, but if
> > > >> I do
> > > >> > > > > that, I suppose I lose the power of RETEOO pattern
> > matching
> > > >> (pattern
> > > >> > > > resuing,
> > > >> > > > > etc.). So I prefer not to do that.
> > > >> > > > >
> > > >> > > > > I also understand I can break the above logic into 4
> > rules
> > > >> and that
> > > >> > > > > would be quite easy, but our business user is not used to
> > > >> think in
> > > >> > > > > that way. Also, we have more complex logic than the
> > above. So
> > > >> what I
> > > >> > > > > want is to see if there is a way to convert this
> > > >> > > > > kind of logic in ONE DRL rule.
> > > >> > > > >
> > > >> > > > > Thanks in advance.
> > > >> > > > >
> > > >> > > > > Bill
> > > >> > > > > _______________________________________________
> > > >> > > > > rules-users mailing list
> > > >> > > > > rules-users at lists.jboss.org
> > <mailto:rules-users at lists.jboss.org>
> > > >> > > > >
> > > >> https://lists.jboss.org/mailman/listinfo/rules-users
> > > >> > > > >
> > > >> > > >
> > > >> > > >
> > > >> > > >
> > > >> > > > --
> > > >> > > > Steven Williams
> > > >> > > >
> > > >> > > > Supervising Consultant
> > > >> > > >
> > > >> > > > Object Consulting
> > > >> > > > Office: 8615 4500 Mob: 0439 898 668 Fax: 8615 4501
> > > >> > > > stevenw at objectconsulting.com.au
> > <mailto:stevenw at objectconsulting.com.au>
> > > >> > > > www.objectconsulting.com.au
> > <http://www.objectconsulting.com.au>
> > > >> > > >
> > > >> > > > consulting | development | training | support
> > > >> > > > our experience makes the difference
> > > >> > > > _______________________________________________
> > > >> > > > rules-users mailing list
> > > >> > > > rules-users at lists.jboss.org
> > <mailto:rules-users at lists.jboss.org>
> > > >> > > > https://lists.jboss.org/mailman/listinfo/rules-users
> > > >> > > >
> > > >> > > >
> > > >> > >
> > > >> > _______________________________________________
> > > >> > rules-users mailing list
> > > >> > rules-users at lists.jboss.org
> > <mailto:rules-users at lists.jboss.org>
> > > >> > https://lists.jboss.org/mailman/listinfo/rules-users
> > > >> >
> > > >>
> > > >>
> > > >>
> > > >> --
> > > >> Steven Williams
> > > >>
> > > >> Supervising Consultant
> > > >>
> > > >> Object Consulting
> > > >> Office: 8615 4500 Mob: 0439 898 668 Fax: 8615 4501
> > > >> stevenw at objectconsulting.com.au
> > <mailto:stevenw at objectconsulting.com.au>
> > > >> www.objectconsulting.com.au <http://www.objectconsulting.com.au>
> > > >>
> > > >> consulting | development | training | support
> > > >> our experience makes the difference
> > > >> _______________________________________________
> > > >> rules-users mailing list
> > > >> rules-users at lists.jboss.org <mailto:rules-users at lists.jboss.org>
> > > >> https://lists.jboss.org/mailman/listinfo/rules-users
> > > >>
> > > >>
> > > > _______________________________________________
> > > > rules-users mailing list
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> > > > https://lists.jboss.org/mailman/listinfo/rules-users
> > <https://lists.jboss.org/mailman/listinfo/rules-users>
> > > >
> > >
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> >
> >
> >
> >
> > --
> > Steven Williams
> >
> > Supervising Consultant
> >
> > Object Consulting
> > Office: 8615 4500 Mob: 0439 898 668 Fax: 8615 4501
> > stevenw at objectconsulting.com.au <mailto:stevenw at objectconsulting.com.au>
> > www.objectconsulting.com.au <http://www.objectconsulting.com.au>
> >
> > consulting | development | training | support
> > our experience makes the difference
> > ------------------------------------------------------------------------
> >
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