10:39 a.m.
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
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10:46 a.m.
On 5 July 2011 10:39, lansyj <lansyjp(a)gmail.com> wrote:
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?
What do you mean by "native Drools enumeration"?
Would this be an optimal
implementation?
IDs such as phone numbers or email addresses are strings, so what sort of
access do you need that's not efficiently feasible with a hash map or hash
set? Detailed knowledge of the value disrtibution of your IDs might be used
for an optimum hash function, but that's a technicality.
-W
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
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10:54 a.m.
Hi,
I understand Drools does support enumerated lists of values for checking
conditions and assigning consequences. Am i mistaken?
The ID would be a numeric value of 8 or 12 bytes in length. The Blacklist
validation would be just the basic full word match.
Best Regards
-lj
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11:04 a.m.
Guvnor supports enumerated lists of values that can be included in rules.
Drools itself (the "rule engine") provides for the compilation and execution
of rules; ultimately written in plain text - Guvnor provides a UI layer of
abstraction over the text generation that allows use of enumerations.
You can use Java enumerations in Drools rule definitions, but you still need
to write the rules using such enumerations.
On 5 July 2011 09:54, lansyj <lansyjp(a)gmail.com> wrote:
Hi,
I understand Drools does support enumerated lists of values for checking
conditions and assigning consequences. Am i mistaken?
The ID would be a numeric value of 8 or 12 bytes in length. The Blacklist
validation would be just the basic full word match.
Best Regards
-lj
--
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11:04 a.m.
On 5 July 2011 10:54, lansyj <lansyjp(a)gmail.com> wrote:
Hi,
I understand Drools does support enumerated lists of values for checking
conditions and assigning consequences. Am i mistaken?
It's using a Rete network, and I've never heard "enumerated lists of
values"
in any description of the involved algorithms. Where does this come from?
The ID would be a numeric value of 8 or 12 bytes in length. The
Blacklist
validation would be just the basic full word match.
Basically a subset of positive "long" values; if area codes are involved,
distribution is not regular (even within a certain number of digits). But a
hash lookup on the String value should give you good performance.
Subscriber( $addr: address )
Blacklist( set contains $addr )
then
refuse...
-W
Best Regards
-lj
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10:46 a.m.
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(a)lists.jboss.org [mailto:rules-users-
bounces(a)lists.jboss.org] On Behalf Of lansyj
Sent: 05 July 2011 09:39
To: rules-users(a)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
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5 comments
4 participants
participants (4)
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lansyj -
Michael Anstis -
Swindells, Thomas -
Wolfgang Laun