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<p class="MsoPlainText">A better approach is probably to split up the conditions from action.<o:p></o:p></p>
<p class="MsoPlainText">Each condition would be a separate rule which would use insertLogically to insert a new object.<o:p></o:p></p>
<p class="MsoPlainText">Then have another rule which accumulates and counts how many of these objects exist in the working memory. If the count is >= 2 then perform the action.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Thomas<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> rules-users-bounces@lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] <b>On Behalf Of </b>Tihomir Surdilovic<br>
<b>Sent:</b> 03 June 2010 13:40<br>
<b>To:</b> rules-users@lists.jboss.org<br>
<b>Subject:</b> Re: [rules-users] Firing a rule if at least its two conditions are satified<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">IMO you can just use activation groups and not have to deal with incrementing, something like:<br>
<br>
rule first<br>
activation-group "myactgrp"<br>
when<br>
Condition A<br>
Condition B<br>
then<br>
...<br>
end<br>
<br>
<br>
rule second<br>
activation-group "myactgrp"<br>
when<br>
Condition A<br>
Condition C<br>
then<br>
...<br>
end<br>
<br>
rule third<br>
activation-group "myactgrp"<br>
when<br>
Condition B<br>
Condition C<br>
then<br>
...<br>
end<br>
<br>
When one of these rules fire it will cancel the activation of all other rules in the same activation group. You can also then add salience to control rule priority.<br>
<br>
<br>
On 6/3/10 8:15 AM, PAYET, Manuel wrote: <o:p></o:p></p>
<pre>If I were you, I'd use something like <o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Global java.lang.Integer cnt;<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Rule "before everything"<o:p></o:p></pre>
<pre>Salience 10<o:p></o:p></pre>
<pre>When<o:p></o:p></pre>
<pre>Eval(true)<o:p></o:p></pre>
<pre>Then<o:p></o:p></pre>
<pre>Cnt=0<o:p></o:p></pre>
<pre>End<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Rule "condition A"<o:p></o:p></pre>
<pre>When <o:p></o:p></pre>
<pre> condition A<o:p></o:p></pre>
<pre>Then<o:p></o:p></pre>
<pre> cnt=cnt+1;<o:p></o:p></pre>
<pre>End<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Rule "condition B"<o:p></o:p></pre>
<pre>When <o:p></o:p></pre>
<pre> condition B<o:p></o:p></pre>
<pre>Then<o:p></o:p></pre>
<pre> cnt=cnt+1;<o:p></o:p></pre>
<pre>End<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Rule "condition C"<o:p></o:p></pre>
<pre>When <o:p></o:p></pre>
<pre> condition B<o:p></o:p></pre>
<pre>Then<o:p></o:p></pre>
<pre> cnt=cnt+1;<o:p></o:p></pre>
<pre>End<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Rule "action 1, after everything"<o:p></o:p></pre>
<pre>Salience -10<o:p></o:p></pre>
<pre>When <o:p></o:p></pre>
<pre> eval(cnt>=2)<o:p></o:p></pre>
<pre>Then<o:p></o:p></pre>
<pre> execute action 1<o:p></o:p></pre>
<pre>End<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Of course, if you change the fact, you'll probably have to think about things like lock-on-active to increment only one time the cnt variable<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre><o:p> </o:p></pre>
<pre>-----Message d'origine-----<o:p></o:p></pre>
<pre>De : <a href="mailto:rules-users-bounces@lists.jboss.org">rules-users-bounces@lists.jboss.org</a> [<a href="mailto:rules-users-bounces@lists.jboss.org">mailto:rules-users-bounces@lists.jboss.org</a>] De la part de skasab2s<o:p></o:p></pre>
<pre>Envoyé : jeudi 3 juin 2010 14:04<o:p></o:p></pre>
<pre>À : <a href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a><o:p></o:p></pre>
<pre>Objet : [rules-users] Firing a rule if at least its two conditions are satified<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Hello,<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>we are using Drools in our company. We have a rule with three conditions in this format:<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>when<o:p></o:p></pre>
<pre> Condition A<o:p></o:p></pre>
<pre> Condition B<o:p></o:p></pre>
<pre> Condition C<o:p></o:p></pre>
<pre>then <o:p></o:p></pre>
<pre> execute Action 1<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Now we have a situation, in which the rule should fire if AT LEAST two of the three conditions are satisfied. Do you know how to implement this? Any ideas or hints?<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>Many thanks and regards!<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>skasab2s.<o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre><o:p> </o:p></pre>
<pre> <o:p></o:p></pre>
<pre><o:p> </o:p></pre>
<pre>--<o:p></o:p></pre>
<pre>View this message in context: <a href="http://drools-java-rules-engine.46999.n3.nabble.com/Firing-a-rule-if-at-least-its-two-conditions-are-satified-tp867432p867432.html">http://drools-java-rules-engine.46999.n3.nabble.com/Firing-a-rule-if-at-least-its-two-conditions-are-satified-tp867432p867432.html</a><o:p></o:p></pre>
<pre>Sent from the Drools - User mailing list archive at Nabble.com.<o:p></o:p></pre>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>rules-users mailing list<o:p></o:p></pre>
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