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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">That¡¯s because $a1 can equal $a2 which can equal $a3.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D">The following should ensure that the events are distinct and processed in the right order (there didn¡¯t seem to be anything stopping $a2 from being matched
totally out of sequence.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif""> </span> $a1: EventA( $index : index )<br>
<span style="font-family:"Calibri","sans-serif""> </span> $a2: EventA( index == $index, this after $a1 )<br>
<span style="font-family:"Calibri","sans-serif""> </span> $a3: EventA( index == $index, this after $a2 )<span style="font-size:11.0pt;font-family:
"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif""> </span> not PatternConsumer( name == 'AAA', events contain $a1 || contais $a2 || contains $a3)<o:p></o:p></p>
<p class="MsoNormal"><br>
<span style="font-family:"Calibri","sans-serif""> </span> not EventB( this after[0ms] $a1 && before[0ms] $a3, index == $index )<span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></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"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;
font-family:"Tahoma","sans-serif""> rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org]
<b>On Behalf Of </b>???<br>
<b>Sent:</b> 26 October 2010 09:08<br>
<b>To:</b> Rules Users List<br>
<b>Subject:</b> Re: [rules-users] How to write a rule like this<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello,<o:p></o:p></p>
<div>
<p class="MsoNormal">Hello,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">I just tried this rule, but it doesn't seem to work as expected.<span style="font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">What I have now is every time I have an EventA received then a pattern is reported matched no matter whether any of the other constrains is met.<o:p></o:p></p>
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<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">Any ideas?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Best Regards,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Kevin Zhao<o:p></o:p></p>
<div>
<p class="MsoNormal">2010/10/26 Michael Anstis <<a href="mailto:michael.anstis@gmail.com">michael.anstis@gmail.com</a>><o:p></o:p></p>
<p class="MsoNormal">You could try this too; if you don't want lots of new attributes for your model:-<o:p></o:p></p>
<div>
<p class="MsoNormal"><br>
<br>
rule "three A"<br>
when<br>
<span style="font-family:"Calibri","sans-serif""> </span> $a1: EventA( $index : index )<br>
<span style="font-family:"Calibri","sans-serif""> </span> $a2: EventA( index == $index )<br>
<span style="font-family:"Calibri","sans-serif""> </span> $a3: EventA( index == $index )<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif""> </span> not PatternConsumer( name == 'AAA', events contain $a1 || contais $a2 || contains $a3)<o:p></o:p></p>
<div>
<p class="MsoNormal"><br>
<span style="font-family:"Calibri","sans-serif""> </span> not EventB( this after[0ms] $a1 && before[0ms] $a3, index == $index )<br>
then<br>
<span style="font-family:"Calibri","sans-serif""> </span> // ... match<o:p></o:p></p>
</div>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif""> </span> PatternConsumer pc = new PatternConsumer("AAA", $a1, $a2, $a3 );<br>
<span style="font-family:"Calibri","sans-serif""> </span> insert(pc);<o:p></o:p></p>
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<p class="MsoNormal">end<o:p></o:p></p>
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<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
<br>
<o:p></o:p></p>
<div>
<p class="MsoNormal">2010/10/25 Wolfgang Laun <<a href="mailto:wolfgang.laun@gmail.com" target="_blank">wolfgang.laun@gmail.com</a>><o:p></o:p></p>
<p class="MsoNormal">Giving those other rules a higher salience is one way, but I think<br>
it is better to add a boolean field "usedForAAA" to class EventA. <br>
<br>
rule "three A"<br>
when<br>
<span style="font-family:"Calibri","sans-serif""> </span> $a1: EventA( $index : index, usedForAAA == false )<br>
<span style="font-family:"Calibri","sans-serif""> </span> $a2: EventA( index == $index, usedForAAA == false )<br>
<span style="font-family:"Calibri","sans-serif""> </span> $a3: EventA( index == $index, usedForAAA == false )<o:p></o:p></p>
<div>
<p class="MsoNormal"><br>
<span style="font-family:"Calibri","sans-serif""> </span> not EventB( this after[0ms] $a1 && before[0ms] $a3, index == $index )<br>
then<br>
<span style="font-family:"Calibri","sans-serif""> </span> // ... match<o:p></o:p></p>
</div>
<p class="MsoNormal"><span style="font-family:"Calibri","sans-serif""> </span> modify( $a1 ){ setUsedForAAA( true ) }<br>
<span style="font-family:"Calibri","sans-serif""> </span> modify( $a2 ){ setUsedForAAA( true ) }
<br>
<span style="font-family:"Calibri","sans-serif""> </span> modify( $a3 ){ setUsedForAAA( true ) }<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
end<br>
<br>
-W<br>
<br>
<o:p></o:p></p>
<div>
<p class="MsoNormal">2010/10/25 <span lang="ZH-CN">ÕÔ٩٩</span> <<a href="mailto:kevin223@gmail.com" target="_blank">kevin223@gmail.com</a>><o:p></o:p></p>
<p class="MsoNormal">Thanks Wolfgang,<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">It now starts to make sense to me. However, is it possible that I don't retract those matched eventA? All those events might be used to evaluate against other rules.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thanks again,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Kevin Zhao<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">2010/10/25 Wolfgang Laun <<a href="mailto:wolfgang.laun@gmail.com" target="_blank">wolfgang.laun@gmail.com</a>><o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">I assume you are using Fusion, using a session clock so that temporal operators are available.<br>
<br>
rule "three A"<br>
when<br>
<span style="font-family:"Calibri","sans-serif""> </span> $a1: EventA( $index : index )<br>
<span style="font-family:"Calibri","sans-serif""> </span> $a2: EventA( index == $index )<br>
<span style="font-family:"Calibri","sans-serif""> </span> $a3: EventA( index == $index )<br>
<span style="font-family:"Calibri","sans-serif""> </span> not EventB( this after[0ms] $a1 && before[0ms] $a3, index == $index )<br>
then<br>
<span style="font-family:"Calibri","sans-serif""> </span> // ... match<br>
<span style="font-family:"Calibri","sans-serif""> </span> retract( $a1 );<br>
<span style="font-family:"Calibri","sans-serif""> </span> retract( $a2 );<br>
<span style="font-family:"Calibri","sans-serif""> </span> retract( $a3 );<br>
end<br>
<br>
-W<o:p></o:p></p>
<div>
<p class="MsoNormal">2010/10/25 <span lang="ZH-CN">ÕÔ٩٩</span> <<a href="mailto:kevin223@gmail.com" target="_blank">kevin223@gmail.com</a>><o:p></o:p></p>
<div>
<div>
<p class="MsoNormal">Hello,<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">I'm still quite new to the drools stuffs just getting the examples running. I'm sorry if my question is too basic.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">I have a system that will continuously to receive events sent from some other system. Basically I have<span style="font-family:"Calibri","sans-serif""> </span>two types of events, eventA and eventB.<span style="font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Both eventA and eventB have two properties, index and timestamp.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">What I want is to capture a pattern to meet the following conditions<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">1. every 3 consecutive eventsA without any eventB in between<span style="font-family:"Calibri","sans-serif""> </span>having a same index value<span style="font-family:"Calibri","sans-serif""> </span>ordering by their timestamp.<span style="font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">2. all events in a matched pattern will have the same value of property index.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">3. if a pattern is matched, any of the events in this pattern should not be used again for a new matching.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">there are some examples below, the number after a colon stands for the value of its index number and assume those events are already ordered by their timestamp.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">eventB:2 <span style="font-family:"Calibri","sans-serif""> </span>
<span style="font-family:"Calibri","sans-serif""> </span>eventA:1 <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span> eventA:1 <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span> eventA:1 <span style="font-family:"Calibri","sans-serif"">
</span>eventB:3 <span style="font-family:"Calibri","sans-serif""> </span> <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span>--------- one successful match, we have three eventA with same index value 1 in a row<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">eventB:2 <span style="font-family:"Calibri","sans-serif""> </span>
<span style="font-family:"Calibri","sans-serif""> </span>eventA:1 <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span> eventA:1 <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span> eventB:1 <span style="font-family:"Calibri","sans-serif"">
</span>eventA:1 <span style="font-family:"Calibri","sans-serif""> </span> <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span>--------- no match because there's an eventB in between<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">eventB:2 <span style="font-family:"Calibri","sans-serif""> </span>
<span style="font-family:"Calibri","sans-serif""> </span>eventA:1 <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span> eventA:1 <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span> eventB:2 <span style="font-family:"Calibri","sans-serif"">
</span>eventA:1 <span style="font-family:"Calibri","sans-serif""> </span> <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span>--------- one successful match because the in-between eventB has a different index value<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">eventA:1 <span style="font-family:"Calibri","sans-serif""> </span>
<span style="font-family:"Calibri","sans-serif""> </span>eventA:1 <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span> eventA:1 <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span> eventA:1 <span style="font-family:"Calibri","sans-serif"">
</span>eventA:1 <span style="font-family:"Calibri","sans-serif""> </span> <span style="font-family:"Calibri","sans-serif"">
</span> <span style="font-family:"Calibri","sans-serif""> </span>--------- only one match, because once matched, the events can not be used for a second match again.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">I just don't know how to write a rule like this. Is there anyone who can shed some lights on?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Best Regards,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Kevin<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt">_______________________________________________<br>
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