<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>Have you looked at agenda-group or ruleflow-group? You've reinvented some of their functionality here. </span></div><div><br></div> <div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; "> <div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; "> <div dir="ltr"> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> "Cotton, Ben" <Ben.Cotton@morganstanley.com><br> <b><span style="font-weight: bold;">To:</span></b> "rules-users@lists.jboss.org" <rules-users@lists.jboss.org> <br><b><span style="font-weight: bold;">Cc:</span></b> "O'Brien, Patrick" <Patrick.O'Brien@morganstanley.com> <br> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, November 29, 2012 10:47 AM<br>
<b><span style="font-weight: bold;">Subject:</span></b> [rules-users] DROOLs 'Guarded entry/block' tactics for Rules synchronization and ordinality?<br> </font> </div> <br>
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<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;">Hi,</span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;"> </span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;">I have finally gained a tiny bit of control (and maybe even some competency) in using the DROOLs language operators ‘no-loop’ and ‘lock-on-active’ as a basis for controlling rule set firing behavior in response
to Fact mutation events (during consequence processing).</span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;"> </span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;">I now want to (competently!) use DROOLs language tactics that give me ever finer grained control over managing rule set firing behavior on Fact mutation events. Specifically, I want to be able to implement
some form of ‘Guarded entry/block’ controls. </span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;"> </span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;">E.g. let’s say I have a Fact (InsertedFactPOJO) that I insert into the KS and want to have its ‘fireAllRules()’ AgendaSet(s) renedered in exact incremental ordinal stages and in perfect isolation. To do
this, I am testing the inclusion of a ‘countdownLatch’ Semaphore reference as a Fact member (initialized to N=`total rule count` value). I then use this to ‘Guard’ individual rule entry, by generating an explicit predicate participant
</span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;"> </span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;">(</span><span style="color:black;">InsertedFactPOJO(countdownLatch == i)
</span><span style="font-size:12.0pt;">) </span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;"> </span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;">@ each ith Rule producedby my template.</span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;"> </span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;">Is this approach a valid/sound/complete way to implement ‘Guarded entry/block’ controls in DROOLs? Is there a better way?</span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;"> </span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;">As always, my sincerest gratitude to this community for its generosity (and its genius).</span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;"> </span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;">Ben</span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;"> </span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">package</span></b><span style="color:black;"> com.ms.fast.triclear.eligibility.rules.drools_community.questions.posted;
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">import</span></b><span style="color:black;"> com.ms.fast.triclear.eligibility.InsertedFactPOJO;
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:olive;">//fact:(backed by Class 'InsertedFactPOJO' has
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:olive;">//- 'countdownLatch' (Semaphore) member
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:olive;">//- 'aList' (List)member</span></div>
<div class="yiv211051262MsoNormal" style=""><span style=""> </span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">rule</span></b><span style="color:black;">
</span><span style="color:green;">"RULE_ALL_RULES_HAVE_FIRED_ONCE_ORDINALLY"</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">when</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> fact:InsertedFactPOJO()</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> InsertedFactPOJO(countdownLatch == 0)</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">then</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> System.out.format(</span><span style="color:green;">"\tALL RULES have fired *EXACTLY* once, *EXACTLY* ordinally. "</span><span style="color:black;">+</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><span style="color:green;">" fact.countdownLatch=%d \n\t fact.aList=%s\n\n"</span><span style="color:black;">,</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> fact.countdownLatch,
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> fact.aList.toString());</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">end</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">rule</span></b><span style="color:black;">
</span><span style="color:green;">"RULE_3"</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><b><span style="color:#960000;">when</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> fact:InsertedFactPOJO()</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> InsertedFactPOJO(countdownLatch == 3)</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><span style="color:olive;">//bunch of other L-Value PREDICATES
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> </span><b><span style="color:#960000;">then</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> System.out.format(</span><span style="color:green;">"\t %20.20s"</span><span style="color:black;">+</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><span style="color:green;">" \t(DROOLS agenda: consequence fired for L-value predicate match @RULE="</span><span style="color:black;">+</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><span style="color:green;">"3"</span><span style="color:black;">+</span><span style="color:green;">" -- fact.countDownLatch=%d)\n"</span><span style="color:black;">,
</span><span style="color:green;">"Rule 3"</span><span style="color:black;">,fact.countdownLatch);</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><b><span style="color:#960000;">modify</span></b><span style="color:black;"> (fact) {</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> countdownLatch = fact.countdownLatch - 1,</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> aList.add(</span><span style="color:green;">"Rule 3 pattern-match event added to POJO 'aList' field"</span><span style="color:black;">);</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> }
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">end</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style=""> </span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">rule</span></b><span style="color:black;">
</span><span style="color:green;">"RULE_2"</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><b><span style="color:#960000;">when</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> fact:InsertedFactPOJO()</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> InsertedFactPOJO(countdownLatch == 2)</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><span style="color:olive;">//bunch of other L-Value PREDICATES
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> </span><b><span style="color:#960000;">then</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> System.out.format(</span><span style="color:green;">"\t %20.20s"</span><span style="color:black;">+</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><span style="color:green;">" \t(DROOLS agenda: consequence fired for L-value predicate match @RULE="</span><span style="color:black;">+</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><span style="color:green;">"2"</span><span style="color:black;">+</span><span style="color:green;">" -- fact.countDownLatch=%d)\n"</span><span style="color:black;">,
</span><span style="color:green;">"Rule 2"</span><span style="color:black;">,fact.countdownLatch);</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><b><span style="color:#960000;">modify</span></b><span style="color:black;"> (fact) {</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> countdownLatch = fact.countdownLatch - 1,</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> aList.add(</span><span style="color:green;">"Rule 2 pattern-match event added to POJO 'aList' field"</span><span style="color:black;">);</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> }
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">end</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style=""> </span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">rule</span></b><span style="color:black;">
</span><span style="color:green;">"RULE_1"</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><b><span style="color:#960000;">when</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> fact:InsertedFactPOJO()</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> InsertedFactPOJO(countdownLatch == 1)</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><span style="color:olive;">//bunch of other L-Value PREDICATES
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> </span><b><span style="color:#960000;">then</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> System.out.format(</span><span style="color:green;">"\t %20.20s"</span><span style="color:black;">+</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><span style="color:green;">" \t(DROOLS agenda: consequence fired for L-value predicate match @RULE="</span><span style="color:black;">+</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><span style="color:green;">"1"</span><span style="color:black;">+</span><span style="color:green;">" -- fact.countDownLatch=%d)\n"</span><span style="color:black;">,
</span><span style="color:green;">"Rule 1"</span><span style="color:black;">,fact.countdownLatch);</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;">
</span><b><span style="color:#960000;">modify</span></b><span style="color:black;"> (fact) {</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> countdownLatch = fact.countdownLatch - 1,</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> aList.add(</span><span style="color:green;">"Rule 1 pattern-match event added to POJO 'aList' field"</span><span style="color:black;">);</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><span style="color:black;"> }
</span><span style=""></span></div>
<div class="yiv211051262MsoNormal" style=""><b><span style="color:#960000;">end</span></b><span style=""></span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;"> </span></div>
<div class="yiv211051262MsoNormal"><span style="font-size:12.0pt;"> </span></div>
<div class="yiv211051262MsoNormal"><b><span style="font-size:12.0pt;color:gray;"> </span></b></div>
<div class="yiv211051262MsoNormal"><b><span style="color:gray;">Ben D Cotton III</span></b><span style="font-size:9.0pt;color:gray;"><br>
Morgan Stanley & Co.<br>
OTC Derivatives Clearing Technology <br>
1221 AOTA Rockefeller Ctr - Flr 27<br>
New York, NY 10020<br>
(212)762.9094<br>
<a rel="nofollow" ymailto="mailto:ben.cotton@ms.com" target="_blank" href="mailto:ben.cotton@ms.com"><span style="color:gray;">ben.cotton@ms.com</span></a>
</span></div>
<div class="yiv211051262MsoNormal"> </div>
<div class="yiv211051262MsoNormal"> </div>
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