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<p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi, Wolfgang,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks for the message. I think I’m clear about the listener
piece now!<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Best<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Abe<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:10.5pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span style='font-size:10.0pt'>发件人<span lang=EN-US>:</span></span></b><span
lang=EN-US style='font-size:10.0pt'> rules-users-bounces@lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] </span><b><span style='font-size:
10.0pt'>代表 </span></b><span lang=EN-US style='font-size:10.0pt'>Wolfgang Laun<br>
</span><b><span style='font-size:10.0pt'>发送时间<span lang=EN-US>:</span></span></b><span
lang=EN-US style='font-size:10.0pt'> 2011</span><span style='font-size:10.0pt'>年<span
lang=EN-US>12</span>月<span lang=EN-US>26</span>日<span lang=EN-US> 23:01<br>
</span><b>收件人<span lang=EN-US>:</span></b><span lang=EN-US> Rules Users List<br>
</span><b>主题<span lang=EN-US>:</span></b><span lang=EN-US> Re: [rules-users] </span>答复<span
lang=EN-US>: Performance consideration in rule writing<o:p></o:p></span></span></p>
</div>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>This ought to be another thread/another
subject.<br>
<br>
2011/12/26 Zhuo Li <<a href="mailto:milanello1998@gmail.com">milanello1998@gmail.com</a>><o:p></o:p></span></p>
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<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;
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<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>Any question is also about performance
consideration. See below example:</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>Rule </span><span style='color:#1F497D'>“<span
lang=EN-US>1</span>”</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>
Dialect </span><span style='color:#1F497D'>“<span lang=EN-US>mvel</span>”</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>
Salience 300</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>
No-loop true</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>
When</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>
$acctsrc: data(sourceid==1)</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>
$reposrc: data((sourceid==2||sourceid==5)&&amount==acctsrc.amount)</span><span
lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>
Then</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>
</span><span style='color:#1F497D'>…</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>
End</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>Two questions here:</span><span lang=EN-US><o:p></o:p></span></p>
<p style='margin-left:18.0pt'><span lang=EN-US style='color:#1F497D'>1.</span><span
lang=EN-US style='font-size:7.0pt;font-family:"Times New Roman","serif";
color:#1F497D'> </span><span lang=EN-US
style='color:#1F497D'>In this kind of join conditions, is there any best
practice to follow in the rule? I heard from somebody that I need to put data
who have less # of transactions first in my when expression. For example, if I
have less number of $reposrc transactions in facts, I should put it ahead of
$acctsrc to gain better performance. Is this valid?</span><span lang=EN-US><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=MsoNormal><span lang=EN-US>Correct: narrowing down the number of joins
is best practice.<br>
<o:p></o:p></span></p>
</div>
<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;
margin-left:4.8pt;margin-right:0cm'>
<div>
<div>
<p style='margin-left:18.0pt'><span lang=EN-US style='color:#1F497D'>2.</span><span
lang=EN-US style='font-size:7.0pt;font-family:"Times New Roman","serif";
color:#1F497D'> </span><span lang=EN-US
style='color:#1F497D'>Do we know how to create an event listener in the rule
for logging purpose rather than standard log4j? It was recommended in some
other articles as well. Is this also valid? (<a
href="http://www.technologyblue.com/docs/presentations/DroolsBestPractices.pdf"
target="_blank">http://www.technologyblue.com/docs/presentations/DroolsBestPractices.pdf</a>);</span><span
lang=EN-US><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=MsoNormal><span lang=EN-US>An event listener as provided by Drools for
rule and WM events is not to be confused with a logging service, so your
question doesn't make much sense. The big difference is that a listener gets
informed about all it is set up to listen to, whereas calls to Looger.info()
need to be written wherever logging should be done. This could be in listener
code reacting to an event, or anyplace else, as in the RHS of some rules in the
quoted presentation.<o:p></o:p></span></p>
</div>
<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;
margin-left:4.8pt;margin-right:0cm'>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>Ultimately, is there any place I can find a
best practice of rule development as a generic guide?</span><span lang=EN-US><o:p></o:p></span></p>
</div>
</div>
</blockquote>
<div>
<p class=MsoNormal><span lang=EN-US><br>
Not a single place that I know of. Perhaps if you post this as a separate
thread with a fitting topic.<br>
<br>
-W<o:p></o:p></span></p>
</div>
<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;
margin-left:4.8pt;margin-right:0cm'>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>Best</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'>Abe</span><span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US style='color:#1F497D'> </span><span lang=EN-US><o:p></o:p></span></p>
<div>
<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0cm 0cm 0cm;
border-color:-moz-use-text-color -moz-use-text-color'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b>发件人<span
lang=EN-US>:</span></b><span lang=EN-US> Zhuo Li [mailto:<a
href="mailto:milanello1998@gmail.com" target="_blank">milanello1998@gmail.com</a>]
<br>
</span><b>发送时间<span lang=EN-US>:</span></b><span lang=EN-US> 2011</span>年<span
lang=EN-US>12</span>月<span lang=EN-US>26</span>日<span lang=EN-US> 16:51<br>
</span><b>收件人<span lang=EN-US>:</span></b><span lang=EN-US> 'Rules Users List'<br>
</span><b>主题<span lang=EN-US>:</span></b><span lang=EN-US> Performance
consideration in rule writing<o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Hi, team,<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>I have some quick questions here regarding performance best
practices of rule writing. See below two pieces of rules:<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Rule </span>“<span lang=EN-US>1</span>”<span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> Salience 100<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> No-loop true<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> When $txn :
data(sourceid == 5&&txnjustify==</span>”<span lang=EN-US>995</span>”<span
lang=EN-US>&&eval(creditOption($txn)==1)&&eval(isGCSwitch($txn))&&isCurrencyEquals($txn)==0&&compareToPostThreshold($txn)==2);<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> Then<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>
</span>…<span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> End<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Rule </span>“<span lang=EN-US>2</span>”<span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> Salience 100<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> No-loop true<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> When $txn :
data(sourceid == 5&&txnjustify==</span>”<span lang=EN-US>995</span>”<span
lang=EN-US>&&eval(creditOption($txn)==1)&&eval(isGCSwitch($txn))&&isCurrencyEquals($txn)==0&&compareToPostThreshold($txn)==1);<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> Then<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>
</span>…<span lang=EN-US><o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> End<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Questions:<o:p></o:p></span></p>
<p style='margin-left:18.0pt'><span lang=EN-US>1.</span><span lang=EN-US
style='font-size:7.0pt;font-family:"Times New Roman","serif"'>
</span><span lang=EN-US>Will I gain better performance if I put the rule
differentiator condition </span>“<span lang=EN-US>compareToPostThreshold($txn)==2</span>”<span
lang=EN-US> at the beginning of both rule 1 and 2? <o:p></o:p></span></p>
<p style='margin-left:18.0pt'><span lang=EN-US>2.</span><span lang=EN-US
style='font-size:7.0pt;font-family:"Times New Roman","serif"'>
</span><span lang=EN-US>I saw salaboy</span>’<span lang=EN-US>s video claiming
that to avoid using eval() in the rule. Do we have any alternative way to do
that from a performance consideration or I</span>’<span lang=EN-US>d better
collect/ prepare all the data before I send them into the session?<o:p></o:p></span></p>
<p style='margin-left:18.0pt'><span lang=EN-US>3.</span><span lang=EN-US
style='font-size:7.0pt;font-family:"Times New Roman","serif"'>
</span><span lang=EN-US>What</span>’<span lang=EN-US>s you guys</span>’<span
lang=EN-US> naming convention for rule</span>’<span lang=EN-US>s salience?<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>PS: my Drools version is 5.2.0.<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US> <o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Best regards<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
lang=EN-US>Abe<o:p></o:p></span></p>
</div>
</div>
</div>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US><br>
_______________________________________________<br>
rules-users mailing list<br>
<a href="mailto:rules-users@lists.jboss.org">rules-users@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/rules-users" target="_blank">https://lists.jboss.org/mailman/listinfo/rules-users</a><o:p></o:p></span></p>
</blockquote>
</div>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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