[rules-users] DROOLs callback API for L-value predicate matching events

[Cotton, Ben]

Could a solution be as simple as this?  Is this approach to consuming "LCHUS_IRS_CURRENCY_RULE" L-value matching events sound/complete (and not-vulnerable to any race condition?).  Is there any DROOLS EventListener callback API that would be more appropriate to solve the problem?

E.g.  I want to be able to log when each of these 5 L-value predicates either "MATCHES" or "FAILS TO MATCH" (at the time of the event)

rule "LCHUS_IRS_CURRENCY_RULE"  //XLS Item=195
    when
       IRDCurrencyRuleFact(
            productType == "IRS",
            currency=="GBP",
upfrontFeePaymentDate < IRDCurrencyRuleFact.terminationDate,
            maturity <= 18275,                                                                                        //unit = days, i.e. 50 Years
            notional <= 99,999,999,999.99                                                                      //max Notional
       )
    then
                  System.out.println("LCHUS");
end


Again the objective is to be able to join a high-resolution logging capability wrt to which of the specific 5 L-value predicates matched.  Instinctively, to this DROOLs newbie, this approach seems workable but not ideal ....

rule "LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_1"
    when
       IRDCurrencyRuleFact(productType == "IRS")
   then
                 System.out.println("LCHUS_IRS_CURRENCY_RULE_L-value event 1 match");  //log event  L-value predicate 1 matched
end

rule "LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_2"
    when
       IRDCurrencyRuleFact(currency=="GBP")
   then
                 System.out.println("LCHUS_IRS_CURRENCY_RULE_L-value event 2 match"); //log event  L-value predicate 2 matched
end

rule "LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_3"
    when
            IRDCurrencyRuleFact(upfrontFeePaymentDate < IRDCurrencyRuleFact.terminationDate)
    then
                 System.out.println("LCHUS_IRS_CURRENCY_RULE_L-value event 3 match"); //log event  L-value predicate 3 matched
end

rule "LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_4"
    when
            IRDCurrencyRuleFact(maturity <= 18275)
    then
                 System.out.println("LCHUS_IRS_CURRENCY_RULE_L-value event 4 match"); //log event  L-value predicate 4 matched
end

rule "LCHUS_IRS_CURRENCY_RULE_LVALUE_MATCHING_EVENT_5"
    when
            IRDCurrencyRuleFact(notional <= 99,999,999,999.99)
    then
                 System.out.println("LCHUS_IRS_CURRENCY_RULE_L-value event 5 match"); //log event  L-value predicate 5 matched
end





Ben D Cotton III
Morgan Stanley & Co.
OTC Derivatives Clearing Technology
1221 AOTA Rockefeller Ctr - Flr 27
New York, NY 10020
(212)762.9094
ben.cotton at ms.com<mailto:ben.cotton at ms.com>




From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Cotton, Ben (ISGT)
Sent: Saturday, November 03, 2012 8:24 AM
To: rules-users at lists.jboss.org
Cc: O'Brien, Patrick (ISGT)
Subject: [rules-users] DROOLs callback API for L-value predicate matching events

Hi,  Can someone please point me to compelling examples/sample code  of how to use a DROOLs callback API for very high-resolution logging of L-value predicate matching events?

E.g.  I want to be able to log when each of these 5 L-value predicates either "MATCHES" or "FAILS TO MATCH" (at the time of the event)

rule "LCHUS_IRS_CURRENCY_RULE"  //XLS Item=195
    when
       IRDCurrencyRuleFact(
            productType == "IRS",
            currency=="GBP",
upfrontFeePaymentDate < IRDCurrencyRuleFact.terminationDate,
            maturity <= 18275,                                                                                        //unit = days, i.e. 50 Years
            notional <= 99,999,999,999.99                                                                      //max Notional
       )
    then
                  System.out.println("LCHUS");
end


Ben D Cotton III
Morgan Stanley & Co.
OTC Derivatives Clearing Technology
1221 AOTA Rockefeller Ctr - Flr 27
New York, NY 10020
(212)762.9094
ben.cotton at ms.com<mailto:ben.cotton at ms.com>



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NOTICE: Morgan Stanley is not acting as a municipal advisor and the opinions or views contained herein are not intended to be, and do not constitute, advice within the meaning of Section 975 of the Dodd-Frank Wall Street Reform and Consumer Protection Act. If you have received this communication in error, please destroy all electronic and paper copies and notify the sender immediately. Mistransmission is not intended to waive confidentiality or privilege. Morgan Stanley reserves the right, to the extent permitted under applicable law, to monitor electronic communications. This message is subject to terms available at the following link: http://www.morganstanley.com/disclaimers If you cannot access these links, please notify us by reply message and we will send the contents to you. By messaging with Morgan Stanley you consent to the foregoing.
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