[rules-users] Running rules from the past

Mon Dec 26 13:39:01 EST 2011

Thank you all for the help. Maybe I wasn't very clear at the first time, so
I will write an example.

The tax charged in loans is a rule configured on JBoss rules.

At 2011, my company charge a tax of 8% by year in a loan (Rule version 1).
At 2012, company policy changes and we start to charge 9% (Rule version 2).

All loan applications must be analized (a non-automated process). This can
take several months depending on the value requested.

The "Fool Bar" company make a request at 31/12/2011 when the valid rule is
version 1. At 01/01/2012, the Rule version 2 is activated, but for the "Foo
Bar" Company instance request, the version  1 should be considered valid.
Version 2 is valid only for new instances.

That said, seens to me that I should store either the snapshot name or the
package version number within the request information, so that I can run
the correct set of rules for loan request instance. I read at this (
http://www.mail-archive.com/rules-users@lists.jboss.org/msg21861.html) that
package snapshots could become deprecated in the future. If it is really
true, seems to me that using package versions should be preferred.

Best regards,
Celso

2011/12/26 Wolfgang Laun <wolfgang.laun at gmail.com>

> For re-running an application as it was released some time  ago you'll
> need not only the rules but also Java classes and, possibly, other files,
> e.g., data tables. The Java stuff is bound to be more than just the data
> model as you might have it in Guvnor.
>
> So, full Configuration Management usually has to deliver more that Guvnor
> (as far as I know) is ready to provide - or else it would compete with svn,
> git and whatnot.
>
> A term like "snapshot" is usually different from "release", and the use
> case presented by our banker is based on releases. Otherwise they'd be in
> trouble.
>
> -W
>
>
> On 26 December 2011 18:48, Mauricio Salatino <salaboy at gmail.com> wrote:
>
>> @Ansgar, it looks like you are doing in a database the work that it's
>> being done by Guvnor, that keeps a lot of meta data for all the
>> snapshots and it's ready to keep the snapshots forever, exposing them
>> via a service, so you applications can get the right version. In the
>> same way that you mention just knowing the ID of the snapshot that
>> it's required.
>> Using Guvnor, there is no need to remove snapshots, each snapshot will
>> only contain the rules associated with it and not a complete
>> application.
>> Cheers
>>
>> 2011/12/26 Ansgar Konermann <ansgar.konermann at googlemail.com>:
>> >
>> > Am 26.12.2011 18:16 schrieb "Mauricio Salatino" <salaboy at gmail.com>:
>> >
>> >
>> >>
>> >> Did you try Guvnor? it already store the snapshots version. So you can
>> >> get the right snapshot for running your rules against an old Loan
>> >> again.
>> >>
>> >> @Ansgar: why do you recommend to not use snapshots?
>> >
>> > They change over time, making it more complex to track down the correct
>> > version.
>> >
>> > I'd preferr a stable loan application <=> rule set association. OTOH,
>> it is
>> > probably *possible* to retrieve the correct snapshot version for a loan
>> > application if additional metadata is available. It's just more
>> complicated:
>> > metadata needs to be available and sufficient to determine exactly *one*
>> > snapshot, snapshot needs to be available (not sure if Guvnor stores all
>> > snapshots forever or just a few).
>> >
>> > For releases, there is *one* figure you need to know to reference a
>> certain
>> > ruleset (the version number). Releases are normally kept forever. Or, at
>> > least in my environment, deleting releases is done with extra extra
>> care -if
>> > at all-, whereas snapshots older than a week or so get removed
>> automatically
>> > on a daily basis.
>> >
>> > Best regards,
>> >
>> > Ansgar
>> >
>> >> Cheers
>> >>
>> >>
>> >> 2011/12/26 Ansgar Konermann <ansgar.konermann at googlemail.com>:
>> >> >
>> >> > Am 26.12.2011 18:08 schrieb "Celso Junior" <celsogbj at gmail.com>:
>> >> >
>> >> >
>> >> >>
>> >> >> Hi folks,
>> >> >>
>> >> >> I work at a bank
>> >> >
>> >> > Me too (sort of)
>> >> >
>> >> >> and I am currently studying the best way to use JBoss Rules so that
>> it
>> >> >> fits our needs. Our loan analysis process can take several months
>> >> >> depending
>> >> >> on the type of the loan. Although our business rules can evolve, a
>> loan
>> >> >> must
>> >> >> follow the rules valid at the time the loan application was made.
>> >> >>
>> >> >> In order to attend this requirement I thought about storing at the
>> >> >> database the name of the current snapshot with the loan application
>> >> >> data, so
>> >> >> that it will possible run this rules in the future without freezing
>> my
>> >> >> rule
>> >> >> database.
>> >> >>
>> >> >> * Is there a better way to attend this requirement?
>> >> >
>> >> > Don't use snapshots. Release your rules and store the rules' release
>> >> > number
>> >> > with the loan application data in your database.
>> >> >
>> >> >>
>> >> >> * How can I retrieve meta information from a snapshot, such as the
>> date
>> >> >> when the snapshot was created?
>> >> >>
>> >> >> Thanks in advance,
>> >> >>
>> >> >> Celso
>> >> >>
>> >> >>
>> >> >> _______________________________________________
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>> >> >> rules-users at lists.jboss.org
>> >> >> https://lists.jboss.org/mailman/listinfo/rules-users
>> >> >>
>> >> >
>> >> >
>> >> > _______________________________________________
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>> >> >
>> >>
>> >>
>> >>
>> >> --
>> >>  - CTO @ http://www.plugtree.com
>> >>  - MyJourney @ http://salaboy.wordpress.com
>> >>  - Co-Founder @ http://www.jugargentina.org
>> >>  - Co-Founder @ http://www.jbug.com.ar
>> >>
>> >>  - Salatino "Salaboy" Mauricio -
>> >>
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>>
>>
>> --
>>  - CTO @ http://www.plugtree.com
>>  - MyJourney @ http://salaboy.wordpress.com
>>  - Co-Founder @ http://www.jugargentina.org
>>  - Co-Founder @ http://www.jbug.com.ar
>>
>>  - Salatino "Salaboy" Mauricio -
>>
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