<html>
<head>
<style>
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
FONT-SIZE: 10pt;
FONT-FAMILY:Tahoma
}
</style>
</head>
<body class='hmmessage'>
<style>.hmmessage P{margin:0px;padding:0px}body.hmmessage{FONT-SIZE: 10pt;FONT-FAMILY:Tahoma}</style>Ok.<br><br>I have to compute the gravity for a large number of debts. (It must be done as fast as possible). The customer give me the rules 'in natural language' and a ruleflow.<br><br>The ruleflow : attached to this mail, I hope<br><br>Problems :<br><br>1) no more than 1 rule can be activated in each ruleflowgroup (thats why I used the "computed")<br><br>2) using "computed", I realize that the value of "computed" in the real object was true after the first rule activated, but still false in his shadow.<br><br>3) so I used update. It worked fine for the first ruleflow group, but in the second ruleflow group (compute C), the first rule was activated again and again (I absolutely need to know the new value of C in order to compute D, so I also used update in this group).<br><br><img src="file:///C:/DOCUME%7E1/GUEHEN%7E1/LOCALS%7E1/Temp/moz-screenshot.jpg" alt=""><img src="file:///C:/DOCUME%7E1/GUEHEN%7E1/LOCALS%7E1/Temp/moz-screenshot-1.jpg" alt="">4) Solution : use booleans to control the ruleflow ... without ruleflow.<br><br>That's where I am.<br><br><blockquote><hr>Subject: RE: [rules-users] Synch Business Object / Working Memory<br>Date: Fri, 11 Apr 2008 15:57:03 +0100<br>From: manstis1@ford.com<br>To: rules-users@lists.jboss.org<br><br><meta http-equiv="Content-Type" content="text/html; charset=unicode"><meta name="Generator" content="Microsoft SafeHTML"><style>.ExternalClass .EC_hmmessage P{padding-right:0px;padding-left:0px;padding-bottom:0px;padding-top:0px;}.ExternalClass BODY.EC_hmmessage{font-size:10pt;font-family:Tahoma;}</style><div dir="ltr" align="left"><span class="EC_218345314-11042008"><font color="#0000ff" face="Arial">I am confident Drools supports what you are looking for; did you try update() - or modify() - in the 'then' part of the rule (and not in Java as you code snippet)?</font></span></div><div dir="ltr" align="left"><span class="EC_218345314-11042008"><font color="#0000ff" face="Arial"></font></span> </div><div dir="ltr" align="left"><span class="EC_218345314-11042008"><font color="#0000ff" face="Arial">Can you explain more the need for the 'computed' flag on the fact? Is the value of a property set sometimes whilst calculated at other times?</font></span></div><div dir="ltr" align="left"><span class="EC_218345314-11042008"><font color="#0000ff" face="Arial"></font></span> </div><div dir="ltr" align="left"><span class="EC_218345314-11042008"><font color="#0000ff" face="Arial">Stick with both Drools and the group - we'll get you to where you want to be.</font></span></div><br><blockquote style="margin-right: 0px;"> <div class="EC_OutlookMessageHeader" dir="ltr" align="left" lang="en-us"> <hr> <font face="Tahoma"><b>From:</b> rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] <b>On Behalf Of </b>Jonathan Guéhenneux<br><b>Sent:</b> 11 April 2008 15:41<br><b>To:</b> Rules Users List<br><b>Subject:</b> RE: [rules-users] Synch Business Object / Working Memory<br></font><br></div> <div></div>First, thank you for yours answers which are very clear. Your solution will probably work. I'm just desapointed that there is no way to synchronized the shadow with the object. That would be great for my work.<br><br> <blockquote> <hr> Subject: RE: [rules-users] Synch Business Object / Working Memory<br>Date: Fri, 11 Apr 2008 14:57:52 +0100<br>From: manstis1@ford.com<br>To: rules-users@lists.jboss.org<br><br> <style>.ExternalClass .EC_hmmessage P{padding-right:0px;padding-left:0px;padding-bottom:0px;padding-top:0px;}.ExternalClass BODY.EC_hmmessage{font-size:10pt;font-family:Tahoma;}</style> <div dir="ltr" align="left"><font color="#0000ff" face="Arial"><span class="EC_EC_008434813-11042008">Do you need ruleflow? Perhaps this is too simple and I misunderstood.</span></font></div> <div dir="ltr" align="left"><font color="#0000ff" face="Arial"><span class="EC_EC_008434813-11042008"></span></font> </div> <div dir="ltr" align="left"><font color="#0000ff" face="Courier New"><span class="EC_EC_008434813-11042008">package com.sample;</span></font></div> <div><font face="Courier New"></font> </div> <div dir="ltr" align="left"><font color="#0000ff" face="Courier New"><span class="EC_EC_008434813-11042008">public class Test {</span></font></div> <div><font face="Courier New"></font> </div> <div dir="ltr" align="left"><font color="#0000ff" face="Courier New"><span class="EC_EC_008434813-11042008"> private Integer a;<br> private Integer b;<br> private Integer c;</span></font></div> <div><font face="Courier New"></font> </div> <div dir="ltr" align="left"><font color="#0000ff" face="Courier New"><span class="EC_EC_008434813-11042008"> public Integer getA() {<br> return a;<br> }</span></font></div> <div><font face="Courier New"></font> </div> <div dir="ltr" align="left"><font color="#0000ff" face="Courier New"><span class="EC_EC_008434813-11042008"> public Integer getB() {<br> return b;<br> }</span></font></div> <div><font face="Courier New"></font> </div> <div dir="ltr" align="left"><font color="#0000ff" face="Courier New"><span class="EC_EC_008434813-11042008"> public Integer getC() {<br> return c;<br> }</span></font></div> <div><font face="Courier New"></font> </div> <div dir="ltr" align="left"><font color="#0000ff" face="Courier New"><span class="EC_EC_008434813-11042008"> public void setA(Integer a) {<br> this.a = a;<br> }</span></font></div> <div><font face="Courier New"></font> </div> <div dir="ltr" align="left"><font color="#0000ff" face="Courier New"><span class="EC_EC_008434813-11042008"> public void setB(Integer b) {<br> this.b = b;<br> }</span></font></div> <div><font face="Courier New"></font> </div> <div dir="ltr" align="left"><font color="#0000ff" face="Courier New"><span class="EC_EC_008434813-11042008"> public void setC(Integer c) {<br> this.c = c;<br> }</span></font></div> <div><font face="Courier New"></font> </div> <div dir="ltr" align="left"><font color="#0000ff" face="Courier New"><span class="EC_EC_008434813-11042008">}</span></font></div> <div> </div> <div><font color="#0000ff" face="Courier New">package com.sample</font></div> <div> </div> <div><font color="#0000ff" face="Courier New">import com.sample.Test<br> <br>rule 'rule 1'<br> salience 90<br> when<br> a : Test( a != null, b == null )<br> then<br> System.out.println('setting b to 10');<br> a.setB(10);<br> update(a);<br>end</font></div> <div> </div> <div><font color="#0000ff" face="Courier New">rule 'rule 2'<br> salience 80<br> when<br> a : Test( b : b != null, c == null )<br> then<br> System.out.println('setting c to b x 5');<br> a.setC(b * 5);<br> update(a);<br>end</font></div> <div> </div> <div><font color="#0000ff" face="Courier New">rule 'rule 3'<br> salience 70<br> when<br> a : Test( c != null )<br> then<br> System.out.println('c = ' + a.getC());<br>end<br></font></div> <div><font color="#0000ff" face="Courier New"></font> </div> <div><br></div> <blockquote style="margin-right: 0px;"> <div class="EC_EC_OutlookMessageHeader" dir="ltr" align="left" lang="en-us"> <hr> <font face="Tahoma"><b>From:</b> rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] <b>On Behalf Of </b>Jonathan Guéhenneux<br><b>Sent:</b> 11 April 2008 13:23<br><b>To:</b> Rules Users List<br><b>Subject:</b> RE: [rules-users] Synch Business Object / Working Memory<br></font><br></div> <div></div>Indeed, it works but I will have to use such booleans for a lot of rules.<br><br>Cause my rule flow is <span class="EC_EC_def-example">schematically</span> :<br><br>compute A<br>compute B(A)<br>compute C(B)<br>...<br><br>Perhaps I may create several ruleflows, one per independant computing?<br><br> <blockquote> <hr> Subject: RE: [rules-users] Synch Business Object / Working Memory<br>Date: Fri, 11 Apr 2008 12:11:32 +0100<br>From: manstis1@ford.com<br>To: rules-users@lists.jboss.org<br><br> <style>.ExternalClass .EC_hmmessage P{padding-right:0px;padding-left:0px;padding-bottom:0px;padding-top:0px;}.ExternalClass BODY.EC_hmmessage{font-size:10pt;font-family:Tahoma;}</style> <div dir="ltr" align="left"><span class="EC_EC_EC_694480211-11042008"><font color="#0000ff" face="Arial">I was thinking something more like this:-</font></span></div> <div dir="ltr" align="left"><span class="EC_EC_EC_694480211-11042008"><font color="#0000ff" face="Arial"></font></span> </div> <div dir="ltr" align="left"><span class="EC_EC_EC_694480211-11042008"><font color="#960000"><font color="#960000"></font> <p align="left"><font color="#960000"><font color="#0000ff" face="Courier New">package com.sample</font></font></p> <p align="left"><font color="#960000"><font color="#0000ff" face="Courier New">import com.sample.Test<br> <br>rule 'rule 1 - 1'<br> salience 90<br> when<br> a : Test(<br> computed == 'false',<br> c < 15,<br> d >= 75) <br> then<br> System.out.println('setting e to 0');<br> a.setE(0);<br> update(a);<br>end</font></font></p> <p align="left"><font color="#960000"><font color="#0000ff" face="Courier New"></font></font> </p> <p align="left"><font color="#960000"><font color="#0000ff" face="Courier New">rule 'rule 1 - 2'<br> salience 10<br> when<br> a : Test(<br> computed == 'false',<br> c < 15,<br> d >= 75) <br> then<br> System.out.println('setting e to 1');<br> a.setE(1);<br>end<br></font></font></p></font><font color="#960000"> <p align="left"><font color="#0000ff" face="Arial"><span class="EC_EC_EC_694480211-11042008">Note rule 'rule 1 - 2' deliberately uses the same patterns as rule 'rule 1 - 1'.</span></font></p></font></span></div> <div> </div> <div><font color="#0000ff" face="Courier New">package com.sample;</font></div> <div><font face="Courier New"></font> </div> <div><font color="#0000ff" face="Courier New">public class <span class="EC_EC_EC_694480211-11042008">Test</span> {<br> <br> private boolean computed =false;<br> private int c=0;<br> private int d=80;<br> private int e;</font></div> <div><font face="Courier New"></font> </div> <div><font color="#0000ff" face="Courier New"> public String getComputed(){<br> if(computed)<br> return 'true';<br> else<br> return 'false';<br> }</font></div> <div><font face="Courier New"></font> </div> <div><font color="#0000ff" face="Courier New"> public int getC() {<br> return c;<br> }</font></div> <div><font face="Courier New"></font> </div> <div><font color="#0000ff" face="Courier New"> public int getD() {<br> return d;<br> }</font></div> <div><font face="Courier New"></font> </div> <div><font color="#0000ff" face="Courier New"> public void setE(int e){<br> this.e = e;<br> computed = true;<br> }</font></div> <div><font face="Courier New"></font> </div> <div><font color="#0000ff" face="Courier New">}<br></font></div> <div><span class="EC_EC_EC_694480211-11042008"><font color="#0000ff" face="Arial">Rule 'rule 1 - 1' is the only rule to run (and runs once); the second activatino being cancelled due to the update to 'computed'. Here's the audit view:-</font></span></div> <div><span class="EC_EC_EC_694480211-11042008"><font color="#0000ff" face="Arial"></font></span> </div><font color="#0000ff" face="Courier New"><object-stream><br> <list><br> <org.drools.audit.event.ActivationLogEvent><br> <activationId>rule 1 - 1 [1]</activationId><br> <rule>rule 1 - 1</rule><br> <declarations>a=com.sample.Test@67126712(1)</declarations><br> <type>4</type><br> </org.drools.audit.event.ActivationLogEvent><br> <org.drools.audit.event.ActivationLogEvent><br> <activationId>rule 1 - 2 [1]</activationId><br> <rule>rule 1 - 2</rule><br> <declarations>a=com.sample.Test@67126712(1)</declarations><br> <type>4</type><br> </org.drools.audit.event.ActivationLogEvent><br> <org.drools.audit.event.ObjectLogEvent><br> <factId>1</factId><br> <objectToString>com.sample.Test@67126712</objectToString><br> <type>1</type><br> </org.drools.audit.event.ObjectLogEvent><br> <org.drools.audit.event.ActivationLogEvent><br> <activationId>rule 1 - 1 [1]</activationId><br> <rule>rule 1 - 1</rule><br> <declarations>a=com.sample.Test@67126712(1)</declarations><br> <type>6</type><br> </org.drools.audit.event.ActivationLogEvent><br> <org.drools.audit.event.ActivationLogEvent><br> <activationId>rule 1 - 2 [1]</activationId><br> <rule>rule 1 - 2</rule><br> <declarations>a=com.sample.Test@67126712(1)</declarations><br> <type>5</type><br> </org.drools.audit.event.ActivationLogEvent><br> <org.drools.audit.event.ObjectLogEvent><br> <factId>1</factId><br> <objectToString>com.sample.Test@67126712</objectToString><br> <type>2</type><br> </org.drools.audit.event.ObjectLogEvent><br> <org.drools.audit.event.ActivationLogEvent><br> <activationId>rule 1 - 1 [1]</activationId><br> <rule>rule 1 - 1</rule><br> <declarations>a=com.sample.Test@67126712(1)</declarations><br> <type>7</type><br> </org.drools.audit.event.ActivationLogEvent><br> </list><br></object-stream></font> <div><span class="EC_EC_EC_694480211-11042008"></span> </div> <div><br></div> <blockquote style="margin-right: 0px;"> <div class="EC_EC_EC_OutlookMessageHeader" dir="ltr" align="left" lang="en-us"> <hr> <font face="Tahoma"><b>From:</b> rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] <b>On Behalf Of </b>Jonathan Guéhenneux<br><b>Sent:</b> 11 April 2008 11:33<br><b>To:</b> Rules Users List<br><b>Subject:</b> RE: [rules-users] Synch Business Object / Working Memory<br></font><br></div> <div></div>Ok, I think I understood well. I modified my business code, now I call if<br><br>(wm != null)<br> wm.update(wm.getFactHandle(this), this);<br><br>each time a properties is modified.<br><br>But it is worse. Rules that sould be activated only once actually loop, even if I add the no-loop clause.<br><br>I understand why they loop, assuming update = (rectact + insert), but I dont get a solution to my problem. I just want to notify an object changement in order to read again the properties, but I dont want to restart the ruleflow.<br><br>Sorry, but I find hard to say it in english because even in french, it's not very clear ;)<br> <blockquote> <hr> Subject: RE: [rules-users] Synch Business Object / Working Memory<br>Date: Fri, 11 Apr 2008 10:39:41 +0100<br>From: manstis1@ford.com<br>To: rules-users@lists.jboss.org<br><br> <style>.ExternalClass .EC_hmmessage P{padding-right:0px;padding-left:0px;padding-bottom:0px;padding-top:0px;}.ExternalClass BODY.EC_hmmessage{font-size:10pt;font-family:Tahoma;}</style> <div dir="ltr" align="left"><span class="EC_EC_EC_EC_208223809-11042008"><font color="#0000ff" face="Arial">In essence, yes. Have a look at 'update' in the manual (and a read on Shadow Facts will probably be useful too).</font></span></div><br> <blockquote style="margin-right: 0px;"> <div class="EC_EC_EC_EC_OutlookMessageHeader" dir="ltr" align="left" lang="en-us"> <hr> <font face="Tahoma"><b>From:</b> rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] <b>On Behalf Of </b>Jonathan Guéhenneux<br><b>Sent:</b> 11 April 2008 10:24<br><b>To:</b> Rules Users List<br><b>Subject:</b> RE: [rules-users] Synch Business Object / Working Memory<br></font><br></div> <div></div>yes, i made a mistake. its a.setE(...) and not c.setE(...).<br><br>I don't call update. If I dont call update, properties of an object are just read one time for all rules?<br><br><br> <blockquote> <hr> Subject: RE: [rules-users] Synch Business Object / Working Memory<br>Date: Fri, 11 Apr 2008 09:47:43 +0100<br>From: manstis1@ford.com<br>To: rules-users@lists.jboss.org<br><br> <style>.ExternalClass .EC_hmmessage P{padding-right:0px;padding-left:0px;padding-bottom:0px;padding-top:0px;}.ExternalClass BODY.EC_hmmessage{font-size:10pt;font-family:Tahoma;}</style> <div dir="ltr" align="left"><span class="EC_EC_EC_EC_EC_287464408-11042008"><font color="#0000ff" face="Arial">I guess the example is a simplification as 'c' (in RHS) has not been bound to a fact.</font></span></div> <div dir="ltr" align="left"><span class="EC_EC_EC_EC_EC_287464408-11042008"><font color="#0000ff" face="Arial"></font></span> </div> <div dir="ltr" align="left"><span class="EC_EC_EC_EC_EC_287464408-11042008"><font color="#0000ff" face="Arial">Anyway, that aside, do you call 'update' to ensure WM knows of changes to facts otherwise properties need to be 'time-constant' which in your example they are not.</font></span></div><br> <blockquote style="margin-right: 0px;"> <div class="EC_EC_EC_EC_EC_OutlookMessageHeader" dir="ltr" align="left" lang="en-us"> <hr> <font face="Tahoma"><b>From:</b> rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] <b>On Behalf Of </b>Jonathan Guéhenneux<br><b>Sent:</b> 11 April 2008 09:34<br><b>To:</b> Rules Users List<br><b>Subject:</b> [rules-users] Synch Business Object / Working Memory<br></font><br></div> <div></div>Hi,<br><br>I have two rules :<br><br>rule 'rule 1 - 1'<br> <br> salience 90<br> ruleflow-group 'rfg1'<br> when<br> a : A(<br> eComputed == 'false',<br> c < 15,<br> d >= 75) <br> then<br> c.setE(0);<br>end<br><br><br><br>rule 'rule 1 - 2'<br><br> salience 10<br> ruleflow-group 'rfg1'<br> when<br> a : A(<br> eComputed == 'false',<br> c >= 15,<br> d >= 75) <br> then<br> c.setE(1);<br>end<br><br><br><br>and part of the corresponding business code :<br><br>public class A {<br><br> ...<br><br> public String getEComputed(){<br> if(eComputed)<br> return 'true';<br> else<br> return 'false';<br> }<br><br> ...<br><br> public void setE(int e){<br> this.e = e;<br> eComputed = true;<br> }<br><br> ...<br><br>}<br><br><br><br>so, I expected that if the first rule is activated, the second won't be. But according to my tests, the two rule can be fired on the same object A.<br>While debugging, I noticed the getEComputed method was only called once. I suppose that I should write this :<br><br><br>rule 'rule 1 - 1'<br> <br> salience 90<br> ruleflow-group 'rfg1'<br> when<br> a : A(<br> eComputed == 'false',<br> c < 15,<br> d >= 75) <br> then<br> c.setE(0);<br> c.setEComputed('true);<br>end<br><br><br><br>rule 'rule 1 - 2'<br><br> salience 10<br> ruleflow-group 'rfg1'<br> when<br> a : A(<br> eComputed == 'false',<br> c >= 15,<br> d >= 75) <br> then<br> c.setE(1);<br> c.setEComputed('true);<br>end<br><br>But I would prefer another solution. Thanks for help.<br><br> <hr> Plus de 15 millions de français utilisent Windows Live Messenger ! <a href="http://www.windowslive.fr/messenger/" target="_blank">Téléchargez Messenger, c'est gratuit !</a> </blockquote></blockquote><br> <hr> Plus de 15 millions de français utilisent Windows Live Messenger ! <a href="http://www.windowslive.fr/messenger/" target="_blank">Téléchargez Messenger, c'est gratuit !</a> </blockquote></blockquote><br> <hr> Tous vos amis discutent sur Messenger, et vous ? <a href="http://www.windowslive.fr/messenger/" target="_blank">Téléchargez Messenger, c'est gratuit !</a> </blockquote></blockquote><br> <hr> Tous vos amis discutent sur Messenger, et vous ? <a href="http://www.windowslive.fr/messenger/" target="_blank">Téléchargez Messenger, c'est gratuit !</a> </blockquote></blockquote><br> <hr> Discutez gratuitement avec vos amis en vidéo ! <a href="http://www.windowslive.fr/messenger/" target="_blank">Téléchargez Messenger, c'est gratuit !</a> </blockquote></blockquote><br /><hr />Tous vos amis discutent sur Messenger, et vous ? <a href='http://www.windowslive.fr/messenger/' target='_new'>Téléchargez Messenger, c'est gratuit !</a></body>
</html>