5:06 p.m.
is there a place to go look at a detailed example?
Thanks
Ghanshyam
From: Wolfgang Laun <wolfgang.laun(a)gmail.com>
To: Rules Users List <rules-users(a)lists.jboss.org>,
Date: 11/05/2012 05:19 AM
Subject: Re: [rules-users] DROOLs callback API for L-value
predicate matching events
Sent by: rules-users-bounces(a)lists.jboss.org
"Learning the reason for failure to match" is the title of a section in my
boot camp you missed at this year's IntelliFest a couple of weeks ago.
You are getting close to the solution, but here's the outline of the
rule programming design pattern:
Write one rule (high salience) to create an auxiliary fact (Aux),
containing a reference to the fact under investigation (Crf) and a
Set.
Write one rule each, combining Aux and Crf, restricting the latter with
one
of the required property values/range. On the RHS, add an
identification to the set component of Aux. DO NOT MODIFY/UPDATE.
Write another rule (low salience) combining Aux and Crf and see what
Aux contains in the Set. Retract Aux.
-W
On 05/11/2012, Cotton, Ben <Ben.Cotton(a)morganstanley.com> wrote:
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@ms.com<mailto:ben.cotton@ms.com>
From: rules-users-bounces(a)lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Cotton, Ben
(ISGT)
Sent: Saturday, November 03, 2012 8:24 AM
To: rules-users(a)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@ms.com<mailto:ben.cotton@ms.com>
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