That's exactly it - and very close to what I'm doing.
I've suggested using Prolog in general for our work because the proofs that
it generates form useful explanations - I think our business wants to see
proofs behind actions. When I joined the project, JRules had been selected
to do the business logic - and it works OK. We are considering Drools
because the source code is available, mainly. We can fix things or add new
functions etc.
The logging I'm doing is basically trying to create a proof to show the
business to explain why a particular score was generated, and why it lead
to a particular action.
Geoffrey Wiseman
<geoffrey.wiseman To:
[email protected]
@gmail.com> cc:
Subject: Re: [drools-user]
should we be logging inside a rule consequence at all?
10/11/2005 16:17
Please respond to
user
On 11/10/05, Hamu, Dave <[EMAIL PROTECTED]> wrote:
>
> What does a calculator have to do with a logger???
I can't speak for Adrian, but if I were going to define a complex (ie
multi-step) calculation in a Drools rule (which I might), and save only the
final result in a domain object (which I might), then I might also want to
log the intermediate steps so that, in the case of failures, I have some
diagnosis.
The event system would not be sufficient to cover that.
In Drools pseudocode:
<parameter>insurancePolicy<parameter>
<condition>insurancePolicy.isValid()</condition>
<condition>insurancePolicy.isFinal()</condition>
<consequence>
float customerValue = insurancePolicy.getVehicle
().getCustomerReportedCost();
float marketValue = insurancePolicy.getVehicle().getMarketValue();
float customerDelta = customerValue - marketValue;
logger.log( "Policy #" + insurancePolicy.getId() + ", Customer Delta: " +
customerDelta );
float premium = PremiumCalculator.annualizedPremium( marketValue );
logger.log( "Policy #" + insurancePolicy.getId() + ", Market Value Premium:
" + premium );
premium += PremiumCalculator.annualizedCustomerDeltaPremium(
insurancePolicy.setPremium( premium );
drools.modifyObject( insurancePolicy );
</consequence>
- Geoffrey
--
Geoffrey Wiseman
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