10:36 p.m.
Hi,
We are evaluating Drools to replace a big legacy eligibility system in government sector.
One of the critical requirement is to have the system pull correct rule based on a date
e.g interest rate was 5% till 12/31/2010 but changed to 6% from 1/1/2011. If we are
running rules in 2010 or before, calculation should use 5% else it should use 6%. Rules
will run with a user clicking a button and results will be shown to user so probably a
StatelessSession will be used. Something like AgendaFilters to filter rules based on a
date probably will not be very scalable since over time we'll have lot of different
temporal version of rules and all of them will have to be in KnowledgeBase for
AgendaFilter to work which will be memory intensive and un-needed.IMHO, we should build
KnowledgeBase with correct version of rules in the first place. Any ideas or pointers?
Thanks
2:08 a.m.
Guvnor repository holds different versions of a rulebase as the evolve
through the years.
Your apps can connect to Guvnor and get the latest rulebase or the
rulebase of a certain version.
Guvnor webapp allows you (or your users) to edit and "release" a new
version with a web application, for example to raise it to 6%.
http://www.jboss.org/drools/drools-guvnor
Op 21-02-11 05:36, Faisal Shafique schreef:
Hi,
We are evaluating Drools to replace a big legacy eligibility system in government sector.
One of the critical requirement is to have the system pull correct rule based on a date
e.g interest rate was 5% till 12/31/2010 but changed to 6% from 1/1/2011. If we are
running rules in 2010 or before, calculation should use 5% else it should use 6%. Rules
will run with a user clicking a button and results will be shown to user so probably a
StatelessSession will be used. Something like AgendaFilters to filter rules based on a
date probably will not be very scalable since over time we'll have lot of different
temporal version of rules and all of them will have to be in KnowledgeBase for
AgendaFilter to work which will be memory intensive and un-needed.IMHO, we should build
KnowledgeBase with correc
t version of rules in the first place. Any ideas or pointers?
Thanks
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
--
With kind regards,
Geoffrey De Smet
3:07 a.m.
There may be one rule to determine the interest rates depending on date and
whatever, and then there should be rules to do the calculation for some type
of deposit (savings, loand,...) with the previously established rate.
Do not replicate calculation rules for various date intervals.
-W
On 21 February 2011 05:36, Faisal Shafique <just_faisal(a)yahoo.com> wrote:
Hi,
We are evaluating Drools to replace a big legacy eligibility system in
government sector. One of the critical requirement is to have the system
pull correct rule based on a date e.g interest rate was 5% till 12/31/2010
but changed to 6% from 1/1/2011. If we are running rules in 2010 or before,
calculation should use 5% else it should use 6%. Rules will run with a user
clicking a button and results will be shown to user so probably a
StatelessSession will be used. Something like AgendaFilters to filter rules
based on a date probably will not be very scalable since over time we'll
have lot of different temporal version of rules and all of them will have to
be in KnowledgeBase for AgendaFilter to work which will be memory intensive
and un-needed.IMHO, we should build KnowledgeBase with correct version of
rules in the first place. Any ideas or pointers?
Thanks
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
3:13 a.m.
Do your rules actually change over time or just the paramaters in your rules change?
If the later then you could structure your rules so they don't have values hard coded
but instead depend upon an Object (InterestRate) to provide them and you code just loads
the appropriate InterestRate object when the query starts.
Thomas
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On
Behalf Of Wolfgang Laun
Sent: 21 February 2011 09:08
To: Rules Users List
Subject: Re: [rules-users] How to get correct version of rules based on effective date
There may be one rule to determine the interest rates depending on date and whatever, and
then there should be rules to do the calculation for some type of deposit (savings,
loand,...) with the previously established rate.
Do not replicate calculation rules for various date intervals.
-W
On 21 February 2011 05:36, Faisal Shafique
<just_faisal@yahoo.com<mailto:just_faisal@yahoo.com>> wrote:
Hi,
We are evaluating Drools to replace a big legacy eligibility system in government sector.
One of the critical requirement is to have the system pull correct rule based on a date
e.g interest rate was 5% till 12/31/2010 but changed to 6% from 1/1/2011. If we are
running rules in 2010 or before, calculation should use 5% else it should use 6%. Rules
will run with a user clicking a button and results will be shown to user so probably a
StatelessSession will be used. Something like AgendaFilters to filter rules based on a
date probably will not be very scalable since over time we'll have lot of different
temporal version of rules and all of them will have to be in KnowledgeBase for
AgendaFilter to work which will be memory intensive and un-needed.IMHO, we should build
KnowledgeBase with correct version of rules in the first place. Any ideas or pointers?
Thanks
_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org<mailto:rules-users@lists.jboss.org>
https://lists.jboss.org/mailman/listinfo/rules-users
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9:36 a.m.
Thats a good question I should have been more clear. Better example would be something
like Federal Tax. Lets say there was a tax deduction allowed for buying a hybrid car in
2008. In 2009, due to changes in tax policy, this deduction is not allowed anymore. In
2010, policy again changed to allow this deduction but only for half the cost of the car.
Now lets say that a person is filing for tax year 2008, 2009 and 2010 together. Effective
date for running the tax rules would be 2008, 2009 and 2010 in this case. User will enter
these dates on screen one by one, running the rules each time and calculate their taxes.
System should be able to use correct rules which were effective at the time as per the
effective date that user enters.
To answer your question, rules themselves change and not just parameters. We already have
a db based infrastructure for pulling out correct parameters (e.g tax bracket limits)
based on effective date.
As its a huge eligibility system, rules changes because of policy are common and this is a
very common use case for government eligibility systems. We need a way to implement this
which is performant, scalable (e.g should not slow down over time because of different
rules versions) and easily maintanable.
Somebody mentioned about pulling correct version from repository. That IMHO is more like
version control system and very coarse grained. We need to be able to version rule by rule
or may be resource like drl files.
Thanks for your help.
On Feb 21, 2011, at 2:13 AM, "Swindells, Thomas" <TSwindells(a)nds.com>
wrote:
Do your rules actually change over time or just the paramaters in
your rules change?
If the later then you could structure your rules so they don’t have values hard coded but
instead depend upon an Object (InterestRate) to provide them and you code just loads the
appropriate InterestRate object when the query starts.
Thomas
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On
Behalf Of Wolfgang Laun
Sent: 21 February 2011 09:08
To: Rules Users List
Subject: Re: [rules-users] How to get correct version of rules based on effective date
There may be one rule to determine the interest rates depending on date and whatever, and
then there should be rules to do the calculation for some type of deposit (savings,
loand,...) with the previously established rate.
Do not replicate calculation rules for various date intervals.
-W
On 21 February 2011 05:36, Faisal Shafique <just_faisal(a)yahoo.com> wrote:
Hi,
We are evaluating Drools to replace a big legacy eligibility system in government sector.
One of the critical requirement is to have the system pull correct rule based on a date
e.g interest rate was 5% till 12/31/2010 but changed to 6% from 1/1/2011. If we are
running rules in 2010 or before, calculation should use 5% else it should use 6%. Rules
will run with a user clicking a button and results will be shown to user so probably a
StatelessSession will be used. Something like AgendaFilters to filter rules based on a
date probably will not be very scalable since over time we'll have lot of different
temporal version of rules and all of them will have to be in KnowledgeBase for
AgendaFilter to work which will be memory intensive and un-needed.IMHO, we should build
KnowledgeBase with correct version of rules in the first place. Any ideas or pointers?
Thanks
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
**************************************************************************************
This message is confidential and intended only for the addressee. If you have received
this message in error, please immediately notify the postmaster(a)nds.com and delete it from
your system as well as any copies. The content of e-mails as well as traffic data may be
monitored by NDS for employment and security purposes. To protect the environment please
do not print this e-mail unless necessary.
NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United
Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603
8808 40-00
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5059
days inactive
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4 comments
4 participants
participants (4)
-
Faisal Shafique -
Geoffrey De Smet -
Swindells, Thomas -
Wolfgang Laun