On Thu, May 21, 2009 at 4:21 PM,
<hrishikesh.varma@wipro.com> wrote:
Hi,
Temporal Reasoning with Accumulate - (like 3- rule "Customer login from
more than 5 locations in the last one month")
What if I want to reset my count for accumulate within the time
specified sliding window.So that I can have the RHS triggered for every
10times the event occurs in the same window.
For Example:
when
$customer : Customer( $id : id )
Number( intValue > 10 ) from accumulate(
CustomerLogin( loginStatus=="Failed", customerId ==
$id,$cusId:customerId)
over window:time( 30s ),
count( $ cusId) )
then
// do something as the customer had abnormal number of failed
violations in last 30 secs.
end
Right now am doing something similar, but using a manual approach -of
explicitly counting.
Any Light on this?
Regards
Rishi
----------------------------------------------------------------------
Message: 1
Date: Tue, 19 May 2009 11:17:41 -0400
From: Edson Tirelli <tirelli@post.com>
Subject: Re: [rules-users] can drools support complex rules
To: Rules Users List <rules-users@lists.jboss.org>
Message-ID:
<e6dd5ba30905190817q33d15b9er5efee64bc74cdb0e@mail.gmail.com>
Content-Type: text/plain; charset="windows-1252"
Your question is funny. First you ask if Drools is capable of
managing
complex rules and then you mention examples of extremely simple rules?
:)
Drools is FOL complete and so can represent any well formed First
Order
Logic expression. Anyway, I will use this message to advertise some of
the
temporal reasoning features that we have on Drools 5 for the benefit of
anyone interested.
There are several ways of authoring such rules, depending on how
you
model your problem domain. One possible way of doing them is:
#1:
rule "If a customer login within 5 minutes from two different locations,
mark the user invalid."
when
$l1 : CustomerLogin( )
$l2 : CustomerLogin( userId == l1.$id, location != $l1.id,
timestamp
after[0s, 5m] $l1.timestamp )
then
// mark user as invalid
end
In the previous example I assumed both login objects would be in working
memory, but you can easily query for the previous login in an external
datasource, pulling the data from the previous login on-demand for the
reasoning cycle.
#2:
rule "If the customer location is not on a list of valid locations, mark
the
user invalid"
when
$l : CustomerLogin( location not memberOf $validLocations )
then
// mark the user invalid
end
In the above rule, I assume the valid locations list is a global list,
but
you can as easily model locations as being facts on your working memory
or a
service end point that you can call to validate the location.
#3:
rule "Customer login from more than 5 locations in the last one month"
when
$customer : Customer( $id : id )
$locations : Set( size > 5 ) from accumulate(
CustomerLogin( customerId == $id, $loc : location )
over window:time( 30d ),
collectSet( $loc ) )
then
// do something as the customer logged in from more than 5 locations
in
the last 30 days
end
In the previous rule I decided to use sliding windows, just to show how
that
feature can be used to simplify rules, but again, there are several ways
of
doing it.
I strongly recommend you read Drools manual.
http://www.jboss.org/drools/documentation.html
Cheers,
Edson
2009/5/19 Bhushan Bhangale <bhushan_bhangale@kaleconsultants.com>
> Hi,
>
>
>
> I recently came across Drools. I gone through the documentation and
the
> examples provide are quite simple. I want to know if it can be really
> applied to complex real world problems.
>
>
>
> Take for example,
>
>
>
> If a customer login within 5 minutes from two different locations,
mark the
> user invalid.
>
> How can I write the above rule in drools? I have the data when the
user
> last logged in and the data of current login. You can say two objects.
>
>
>
> May be my understanding is wrong but looks like based on rule I have
to
> pass all the required data. How can then at real time new rules can be
> added?
>
>
>
> For example,
>
>
>
> If the customer location is not on a list of valid locations, mark the
user
> invalid.
>
>
>
> For the above rule I need to pass a list of valid locations as well.
>
>
>
> Now how about "Customer login from more than 5 locations in the last
one
> month"?
>
>
>
> Thanks
>
> *Mr. Bhangale Bhushan*
> *Associate Manager*
> *Kale Consultants Ltd.*
> bhushan_bhangale@kaleconsultants.com
> tel: +91 (0)206 608
3777<http://www.plaxo.com/click_to_call?lang=en&src=jj_signature&To=%2B9
1+%280%29206+608+3777&Email=bhushan_bhangale@kaleconsultants.com>
> http://www.kaleconsultants.com
>
>
>
>
>
>
>
>
>
> Disclaimer: This email (including any attachments) is intended for the
sole
> use of the recipient/s and may contain material that is CONFIDENTIAL.
Any
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>
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>
>
> _______________________________________________
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--
Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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