[rules-users] can drools support complex rules

[Wolfgang Laun]

Drools is very well equipped for handling large fact collections. As to the
examples you cite, #1 and #2 are simple, as you apparently know. As for #3,
check the documentation on the "collect" and "accumulate" patterns, which
should satisfy you that it can be implemented without undue strain. (To wit:
accumulate over logins, later (now-1month), of that customer, maintaining a
Set of locations, which must be size()>5 at the end. As simple as that.)

Also, keep in mind that you have Java as a fallback; so if some problem
cannot be implemented easily by pattern matching, you can alway resort to
procedural code.

-W


2009/5/19 Bhushan Bhangale <bhushan_bhangale at 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 at kaleconsultants.com
> tel: +91 (0)206 608 3777<http://www.plaxo.com/click_to_call?lang=en&src=jj_signature&To=%2B91+%280%29206+608+3777&Email=bhushan_bhangale@kaleconsultants.com>
> http://www.kaleconsultants.com
>
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