[rules-users] Inter-fact comparison

[Earnest Dyke]

Thanks for the quick reply. 

Yes, the original facts are already coming in via a stream (Fusion) to an existing set of rules so I was hoping to build on that. What I am trying to do is evaluate logins information as users are attempting to login trying to identify hack attempts by a person trying to login with a slightly different user name over a given period of time.

Earnie!




________________________________
From: David Sinclair <dsinclair at chariotsolutions.com>
To: Rules Users List <rules-users at lists.jboss.org>
Sent: Tue, June 22, 2010 3:47:36 PM
Subject: Re: [rules-users] Inter-fact comparison

Hi Earnie,

What you are explaining seems pretty straight forward and would more likely than not be overkill to use a rule engine. Are there other aspects of the system you are leaving out that warrant the use of Drools?

dave


2010/6/22 Earnest Dyke <earniedyke at yahoo.com>

Greetings all,
>
>I have a requirement to compare a set of facts against each other, calculate a value that indicates the amount of difference (Levenshtein distance) between a single attribute on each fact. So I load all of my facts into working memory then what? Do I execute a rule first that creates a new set of facts which is a Cartesian product of the original set of facts, each new fact containing a reference to two original facts and the diff between them? Looked at using a custom accumulate function but I don't think that's going to do what I need since it is intended to go through a set of facts and return a single value.
>
>Any and all related help is appreciated.
>
>Earnie! 
>
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