Ø Have you looked at agenda-group or ruleflow-group? Sweet.
Ø You've reinvented some of their functionality here. Gak! I figured I must have been doing that (and that’s the last thing I want to do). Got stuck in my “Drools newbie deep dive” … knew had to hit this forum and “surface for air”. THANKS! From: [email protected] [mailto:[email protected]] On Behalf Of Greg Barton Sent: Thursday, November 29, 2012 12:00 PM To: Rules Users List Subject: Re: [rules-users] DROOLs 'Guarded entry/block' tactics for Rules synchronization and ordinality? Have you looked at agenda-group or ruleflow-group? You've reinvented some of their functionality here. ________________________________ From: "Cotton, Ben" <[email protected]<mailto:[email protected]>> To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Cc: "O'Brien, Patrick" <Patrick.O'[email protected]> Sent: Thursday, November 29, 2012 10:47 AM Subject: [rules-users] DROOLs 'Guarded entry/block' tactics for Rules synchronization and ordinality? Hi, 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). 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. 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 (InsertedFactPOJO(countdownLatch == i) ) @ each ith Rule producedby my template. Is this approach a valid/sound/complete way to implement ‘Guarded entry/block’ controls in DROOLs? Is there a better way? As always, my sincerest gratitude to this community for its generosity (and its genius). Ben package com.ms.fast.triclear.eligibility.rules.drools_community.questions.posted; import com.ms.fast.triclear.eligibility.InsertedFactPOJO; //fact:(backed by Class 'InsertedFactPOJO' has //- 'countdownLatch' (Semaphore) member //- 'aList' (List)member rule "RULE_ALL_RULES_HAVE_FIRED_ONCE_ORDINALLY" when fact:InsertedFactPOJO() InsertedFactPOJO(countdownLatch == 0) then System.out.format("\tALL RULES have fired *EXACTLY* once, *EXACTLY* ordinally. "+ " fact.countdownLatch=%d \n\t fact.aList=%s\n\n", fact.countdownLatch, fact.aList.toString()); end rule "RULE_3" when fact:InsertedFactPOJO() InsertedFactPOJO(countdownLatch == 3) //bunch of other L-Value PREDICATES then System.out.format("\t %20.20s"+ " \t(DROOLS agenda: consequence fired for L-value predicate match @RULE="+ "3"+" -- fact.countDownLatch=%d)\n", "Rule 3",fact.countdownLatch); modify (fact) { countdownLatch = fact.countdownLatch - 1, aList.add("Rule 3 pattern-match event added to POJO 'aList' field"); } end rule "RULE_2" when fact:InsertedFactPOJO() InsertedFactPOJO(countdownLatch == 2) //bunch of other L-Value PREDICATES then System.out.format("\t %20.20s"+ " \t(DROOLS agenda: consequence fired for L-value predicate match @RULE="+ "2"+" -- fact.countDownLatch=%d)\n", "Rule 2",fact.countdownLatch); modify (fact) { countdownLatch = fact.countdownLatch - 1, aList.add("Rule 2 pattern-match event added to POJO 'aList' field"); } end rule "RULE_1" when fact:InsertedFactPOJO() InsertedFactPOJO(countdownLatch == 1) //bunch of other L-Value PREDICATES then System.out.format("\t %20.20s"+ " \t(DROOLS agenda: consequence fired for L-value predicate match @RULE="+ "1"+" -- fact.countDownLatch=%d)\n", "Rule 1",fact.countdownLatch); modify (fact) { countdownLatch = fact.countdownLatch - 1, aList.add("Rule 1 pattern-match event added to POJO 'aList' field"); } end Ben D Cotton III Morgan Stanley & Co. 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