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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">You need a way to differentiate between policy’s that have been updated and that haven’t been updated.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If you have control of your model then you could add an extra field, either as a flag or containing the new value – if this field is null you know you need
to update it.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If you can’t change that part of the model you can introduce a new class PolicyUpdated(Service policy). When you update the policy you insert one of these.
You then change your conditions to add “not PolicyUpdated(policy == $policy)” which will then stop you retriggering yourself. Finally you need to tell drools that you have modified Client.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It may be more efficient to actually fetch and insert the policy service objects into the working memory, then you only need to tell drools/your rules that
you have updated one small part of your rules rather than getting it to reiterate over all the services every update.<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-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thomas<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-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 style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span 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>Wishing Carebear<br>
<b>Sent:</b> 06 July 2011 04:47<br>
<b>To:</b> Rules Users List<br>
<b>Subject:</b> [rules-users] How to update the working memory of a nested object attribute<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Hi,<br>
My rules update the nested object attributes :eligibilityScore which is used in another rule downstream.<br>
<br>
Only the Client object is sent as fact, the nested object is derived using the from keyword (list of services)<br>
<br>
rule "Rule 8 EligibilityRating"<br>
agenda-group "EligibilityRating"<br>
no-loop true<br>
salience 5<br>
//dialect "mvel"<br>
when<br>
$client : Client(type == "Preferred")<br>
$policy : Service(productType == "Vehicle Insurance") from $client.service<br>
then<br>
System.out.println(" Rule 8 ER = type == preferred:"+ $policy.getId() + ": -50");<br>
int eScore = $policy.getEligibilityScore() - 50;<br>
<b> $policy.setEligibilityScore(eScore);</b> // how to let the downstream rule know that this atribute value is updated without letting this current rule go into infinite loop<br>
end<br>
<br>
Any suggestion is greatly appreciated<o:p></o:p></p>
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