<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
There is something in 5.x which allow a rule to inherit from
another. Inheritance is on parent rule conditions.<br>
<br>
May be you could write something like this:<br>
<br>
<p class="MsoNormal" style=""><span lang="EN-US">rule "london_guys"</span></p>
<p class="MsoNormal" style=""><span lang="EN-US">when</span></p>
<p class="MsoNormal" style=""><span lang="EN-US">
customer:Customer(town=="London")</span></p>
<p class="MsoNormal" style=""><span lang="EN-US">then</span></p>
<p class="MsoNormal" style=""><span lang="EN-US">
System.out.println(customer.getLname() + " is inhabitant of
London");</span></p>
<p class="MsoNormal" style=""><span lang="EN-US">end<br>
<br>
</span></p>
<p class="MsoNormal" style=""><span lang="EN-US">rule "london
teachers" extends </span><span lang="EN-US">"london_guys"</span></p>
<p class="MsoNormal" style=""><span lang="EN-US">when</span></p>
<p class="MsoNormal" style=""><span lang="EN-US">
Customer(job=="TEACHER") from customer<br>
</span></p>
<p class="MsoNormal" style=""><span lang="EN-US">then</span></p>
<span lang="EN-US">
System.out.println(customer.getLname() + " is a teacher");</span><br>
end<br>
<br>
BUT ... <br>
1 - As you can see you cannot inject a new contraint in a
'parent' pattern. So you have to use first variable as a source for
the second pattern ...<br>
2 - Bindings in parent rule only works in 5.1 version (may be
only in trunk), so be careful<br>
<br>
<br>
To conclude, try to check (<a
href="https://jira.jboss.org/browse/JBRULES-1812">here</a>, for a
sample, that may not work, this functionnality is not documented
yet), but I think leonardo's solution is best. May be you can adapt
it to avoid create new classes, but you could use an additional
field in your actual class to "tag" facts according to what your
first rules concludes. <br>
<br>
<br>
<br>
Le 19/10/2010 16:29, Dominik Hüttner a écrit :
<blockquote
cite="mid:018801cb6f9a$0315acf0$094106d0$@huettner@tiq-solutions.de"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1">
<meta name="Generator" content="Microsoft Word 12 (filtered
medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.E-MailFormatvorlage17
{mso-style-type:personal-reply;
font-family:"Arial","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
-->
</style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Arial","sans-serif"; color: rgb(31, 73,
125);" lang="EN-US">Hi Leonardo,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Arial","sans-serif"; color: rgb(31, 73,
125);" lang="EN-US">the performance problem I thought of
meant removing and
inserting the facts again and again, if I would remove the
facts, that don’t
fit the first rule and execute the second rule only on the
remaining facts. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Arial","sans-serif"; color: rgb(31, 73,
125);" lang="EN-US">The solution you offered, does, what I
intend, but the problem
is, that I have to create a new class for every rule-pair
and I want to use it
flexible, without having to create a new class / model for
every rule. Is there
maybe another way to solve this problem?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Arial","sans-serif"; color: rgb(31, 73,
125);" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Arial","sans-serif"; color: rgb(31, 73,
125);" lang="EN-US">Kind regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Arial","sans-serif"; color: rgb(31, 73,
125);" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Arial","sans-serif"; color: rgb(31, 73,
125);" lang="EN-US">Dominik<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Arial","sans-serif"; color: rgb(31, 73,
125);" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Arial","sans-serif"; color: rgb(31, 73,
125);" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Arial","sans-serif"; color: rgb(31, 73,
125);" lang="EN-US"><o:p> </o:p></span></p>
<div style="border-right: medium none; border-width: 1pt medium
medium; border-style: solid none none; border-color: rgb(181,
196, 223) -moz-use-text-color -moz-use-text-color; padding:
3pt 0cm 0cm;">
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family: "Tahoma","sans-serif";">Von:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";">
<a class="moz-txt-link-abbreviated" href="mailto:rules-users-bounces@lists.jboss.org">rules-users-bounces@lists.jboss.org</a>
[<a class="moz-txt-link-freetext" href="mailto:rules-users-bounces@lists.jboss.org">mailto:rules-users-bounces@lists.jboss.org</a>] <b>Im
Auftrag von </b>Leonardo
Gomes<br>
<b>Gesendet:</b> Dienstag, 12. Oktober 2010 16:37<br>
<b>An:</b> Rules Users List<br>
<b>Betreff:</b> Re: [rules-users] Get rid of redundant
conditions in combined
rules.<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom: 12pt;">If your
problem is performance,
don't worry. Conditions evaluation is shared, so in the second
rule you won't
re-evaluate the entire working memory (to know more:<a
moz-do-not-send="true"
href="http://www.drdobbs.com/184405218">http://www.drdobbs.com/184405218</a>).<br>
<br>
If you're worried about not having to repeat the conditions on
the second rule,
I would create inferred facts when the first rule matches and
use then in the
second rule + the additional conditions.<br>
<br>
Something like:<o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Rule1:</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">when</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">
customer:Customer(town=="London")</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">then</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">
insert new LondonCustomer( customer );</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Rule2:</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">when</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">
london : LondonCustomer(customer.job=="TEACHER")</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">then</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">
System.out.println(london.customer.getLname() + " is a
teacher");</span><o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><o:p> </o:p></p>
<div>
<p class="MsoNormal">2010/10/12 Dominik Hüttner <<a
moz-do-not-send="true"
href="mailto:d.huettner@tiq-solutions.de">d.huettner@tiq-solutions.de</a>><o:p></o:p></p>
<div>
<div>
<p class="MsoNormal" style=""><span lang="EN-US">Hello
everyone,</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">I’ve got
a question. I’m using drools-guvnor to execute
some rule-scenarios. I have to solve the following
problem: I have an amount of
objects in my working memory and can’t remove objects
from the working
memory in the then-part of the rule. I want to combine
two rules, the first
rule selects some objects and the second rule checks
only these selected
objects for additional criteria. I have to use two
rules, because I want to
report the objects selected in the first rule, too.
Now I have implemented this
with two rules and in the second rule, the criterias
of the first rule are
copied to the second rule, my question is, is there a
way to get rid of this
redundandance?</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">I have
tried this with a rule flow, but the problem is, this
always
works on the whole working memory, but I can’t remove
the not used
objects from working memory for performance reasons.
Is there another way to
solve this problem?</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Here is
an example for what I intend to do:</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Rule1:</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">when</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">
customer:Customer(town=="London")</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">then</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">
System.out.println(customer.getLname()
+ " is inhabitant of London");</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Rule2:</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">when</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">
customer:Customer(town=="London",job=="TEACHER")</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">then</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">
System.out.println(customer.getLname()
+ " is a teacher");</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">This
example illustrates, with the first rule I want to get
to know,
how many customers are from London and in the second
rule I want to know, how
many of the London customers are teachers. I want to
create a kind of
statistics. I have quite a lot of conditions for the
first rule, so I
don’t want to have them redundantly.</span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style=""><span lang="EN-US">Greetings,
Dominik</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom: 12pt;"><br>
_______________________________________________<br>
rules-users mailing list<br>
<a moz-do-not-send="true"
href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a><br>
<a moz-do-not-send="true"
href="https://lists.jboss.org/mailman/listinfo/rules-users"
target="_blank">https://lists.jboss.org/mailman/listinfo/rules-users</a><o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<pre wrap="">
<fieldset class="mimeAttachmentHeader"></fieldset>
_______________________________________________
rules-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a>
<a class="moz-txt-link-freetext" href="https://lists.jboss.org/mailman/listinfo/rules-users">https://lists.jboss.org/mailman/listinfo/rules-users</a>
</pre>
</blockquote>
<br>
<br>
<div class="moz-signature">-- <br>
<span style="font-size: 13.5pt; font-family:
"Arial","sans-serif"; color: rgb(21, 24,
90);">Vincent LEGENDRE</span><br>
<i><span style="font-size: 8.5pt; font-family:
"Arial","sans-serif"; color: rgb(21, 24,
90);">Consultant Sénior</span></i><br>
<span style="font-size: 4.5pt;"> <br>
</span>
<span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: rgb(21, 24,
90);">EURODECISION</span><br>
<span style="font-size: 9pt; font-family:
"Arial","sans-serif"; color: rgb(21, 24,
90);">9A rue de la Porte de Buc 78000 VERSAILLES<br>
Tél. : +33 (0)1 39 07 12 40<br>
Direct : +33 (0)1 39 07 26 16<br>
<a>www.eurodecision.com</a></span><br>
<a href="http://www.eurodecision.com/"><span style="font-size:
12pt; font-family: "Times New
Roman","serif"; color: windowtext;
text-decoration: none;"> <img
src="cid:part1.00020300.05060507@eurodecision.com"
alt="EURODECISION" border="no"></span></a><a
href="http://www.eurodecision.com/"><span style="font-size:
12pt; font-family: "Times New
Roman","serif"; color: windowtext;
text-decoration: none;"> </span></a>
</div>
</body>
</html>