[rules-users] Implementing Refraction with Drools
magaram
magaram at deltadentalmi.com
Tue Jan 22 08:09:50 EST 2013
Thanks for pointing me to the post Davide.
>From a performance perspective I agree there are concerns. I have provided
some numbers of what I saw
for situations firing several rules over several tuples at the end of this
post -
However, I ran some self loop and complex loop scenarios through this
approach and they seemed to hold. Can you elaborate on why this does not
solve the refraction scenario?
The way I understand refraction is -
This term comes from the neurobiological observation of a refractory
period for a neuron, which means that the neuron is not able to fire
immediately without first going through a relaxation process. In a
similar way, OPS5 will not allow the same instantiation in the conflict
set from firing twice in a row. This prevents the inference engine from
entering into an infinite loop.
I was reading through apost from Mark Proctor on this when I had the idea
of investigating this approach.
http://blog.athico.com/2010/07/slot-specific-and-refraction.html
----------Log snip starts -----------------------
<21 Jan 17:23:45> <INFO> <com.deltadental.claims.rules.engine.RuleEngine>
Time taken for operation [Creating KnowledgeBuilder] = 2
<21 Jan 17:23:46> <INFO> <com.deltadental.claims.rules.engine.RuleEngine>
Time taken for operation [Loading DROOLS ruleset into KnowledgeBuilder] =
809
<21 Jan 17:23:46> <INFO> <com.deltadental.claims.rules.engine.RuleEngine>
Time taken for operation [Creating Knowledgebase] = 1
<21 Jan 17:23:46> <INFO> <com.deltadental.claims.rules.engine.RuleEngine>
Time taken for operation [Loading KnowledgeBase with KnowledgePackages from
KnowledgeBuilder] = 110
<21 Jan 17:23:46> <INFO> <com.deltadental.claims.rules.engine.RuleEngine>
Time taken for operation [Creating StatefulKnowledgeSession for
KnowledgeBase] = 0
<21 Jan 17:23:46> <INFO> <com.deltadental.claims.rules.engine.RuleEngine>
Time taken for operation [Asserting Facts into StatefulKnowledgeSession] =
24
Encountered activation [Activation rule=BORA00105, act#=4, salience=9998978,
tuple=[fact 0:33:2335229:2335229:33:DEFAULT:Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:43:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Removing activation[Activation rule=BORA00105, act#=4, salience=9998978,
tuple=[fact 0:33:2335229:2335229:33:DEFAULT:Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:43:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Encountered activation [Activation rule=BORA00110, act#=5, salience=9998975,
tuple=[fact 0:33:2335229:2335229:33:DEFAULT:Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:43:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Removing activation[Activation rule=BORA00110, act#=5, salience=9998975,
tuple=[fact 0:33:2335229:2335229:33:DEFAULT:Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:43:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Encountered activation [Activation rule=BORA00115, act#=9, salience=9998973,
tuple=[fact 0:8:11412609:2335260:8:null:[Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:43:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Removing activation[Activation rule=BORA00115, act#=9, salience=9998973,
tuple=[fact 0:8:11412609:2335260:8:null:[Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:43:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Encountered activation [Activation rule=BORA00105, act#=4, salience=9998978,
tuple=[fact 0:33:2335229:2335229:33:DEFAULT:Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Removing activation[Activation rule=BORA00105, act#=4, salience=9998978,
tuple=[fact 0:33:2335229:2335229:33:DEFAULT:Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Encountered activation [Activation rule=BORA00110, act#=5, salience=9998975,
tuple=[fact 0:33:2335229:2335229:33:DEFAULT:Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Removing activation[Activation rule=BORA00110, act#=5, salience=9998975,
tuple=[fact 0:33:2335229:2335229:33:DEFAULT:Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Encountered activation [Activation rule=BORA00115, act#=9, salience=9998973,
tuple=[fact 0:8:11412609:2335260:8:null:[Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Removing activation[Activation rule=BORA00115, act#=9, salience=9998973,
tuple=[fact 0:8:11412609:2335260:8:null:[Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Encountered activation [Activation rule=BORA00135, act#=6, salience=9998969,
tuple=[fact 0:33:2335229:2335229:33:DEFAULT:Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Removing activation[Activation rule=BORA00135, act#=6, salience=9998969,
tuple=[fact 0:33:2335229:2335229:33:DEFAULT:Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Encountered activation [Activation rule=BORA00140, act#=8, salience=9998968,
tuple=[fact 0:11:10123092:2335260:11:null:[Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Removing activation[Activation rule=BORA00140, act#=8, salience=9998968,
tuple=[fact 0:11:10123092:2335260:11:null:[Oid = 15661383, Adj ReasonAdd,
Adjusted BC Oid = 8150302]]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Encountered activation [Activation rule=BORA00205, act#=11,
salience=9998965, tuple=[fact 0:37:9594878:9594878:37:DEFAULT:Oid =
15661382, Adj ReasonTerm, Adjusted BC Oid = 8150309]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Removing activation[Activation rule=BORA00205, act#=11, salience=9998965,
tuple=[fact 0:37:9594878:9594878:37:DEFAULT:Oid = 15661382, Adj ReasonTerm,
Adjusted BC Oid = 8150309]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Encountered activation [Activation rule=BORA00210, act#=12,
salience=9998962, tuple=[fact 0:37:9594878:9594878:37:DEFAULT:Oid =
15661382, Adj ReasonTerm, Adjusted BC Oid = 8150309]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Removing activation[Activation rule=BORA00210, act#=12, salience=9998962,
tuple=[fact 0:37:9594878:9594878:37:DEFAULT:Oid = 15661382, Adj ReasonTerm,
Adjusted BC Oid = 8150309]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Encountered activation [Activation rule=BORA00215, act#=17,
salience=9998960, tuple=[fact 0:12:17846274:9594909:12:null:[Oid = 15661382,
Adj ReasonTerm, Adjusted BC Oid = 8150309]]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
Removing activation[Activation rule=BORA00215, act#=17, salience=9998960,
tuple=[fact 0:12:17846274:9594909:12:null:[Oid = 15661382, Adj ReasonTerm,
Adjusted BC Oid = 8150309]]
[fact 0:2:881692:881692:2:DEFAULT:Oid= 8150317, BPSD = 03/01/2009, BPED =
03/31/2009, RD = 02/26/2009]
[fact
0:3:21094514:21094514:45:DEFAULT:com.deltadental.billing.output.rules.BillingOutputRuleContext at 141e072]
]
<21 Jan 17:23:46> <INFO> <com.deltadental.claims.rules.engine.RuleEngine>
Time taken for operation [Firing rules in StatefulKnowledgeSession] = 24
--
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