[rules-users] Using Enumeration for long lists

[Swindells, Thomas]

How complex are the blacklist rules that you are planning to have?
>From what you have described it sounds like it is just substring/startswith matches?
If this is the case then you may be better just to query lucene or the database
directly as you'll result in a very flat extremely wide graph that drools isn't going
to be able to optimize at all - it will basically just iterate over every string doing the
string comparison.
Lucene/the database are likely to be much more optimized and efficient for this.

If on the other hand your blacklist logic is much more complicated, taking into
account multiple criteria such as username, time of day, source ip address,
phase of the moon etc then drools may be easier to optimize development
speed and maintainance,.

Thomas

> -----Original Message-----
> From: rules-users-bounces at lists.jboss.org [mailto:rules-users-
> bounces at lists.jboss.org] On Behalf Of lansyj
> Sent: 05 July 2011 09:39
> To: rules-users at lists.jboss.org
> Subject: [rules-users] Using Enumeration for long lists
>
> Hi,
>
> We are planning to use Drools for a Blacklist validation logic which requires us
> to manage very long list (could be tens of thousands of IDs).
> Can we use the native Drools enumeration for this? Would this be an optimal
> implementation?
>
> The other option we were thinking of was to have a list managed separately
> in our core application and have in lucene indexed such that Drools rule
> checks against the index. But, as you can see, it creates a lot of development
> as well as maintenance overhead.
>
> Thanks in advance for any tips on this topic.
>
> Best Regard
>
> -lj
>
> --
> View this message in context: http://drools.46999.n3.nabble.com/Using-
> Enumeration-for-long-lists-tp3140051p3140051.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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