Re: [rules-users] Is there a faster way of doing this in Drools ?
laune wrote
Merely filtering a subset of data items from a collection according to
user's changing needs and whims is NOT the primary use case of a
production
rule system. This kind of problem has been solved adequately and
efficiently by SQL queries or some similar DB query technique.
It is true that such filtering rules, if compiled and stored in a
KnowledgeBase, can achieve the same thing, but, since rules are targeted
at
a more sophisticated use cases, this will never be as efficient as a
simple
query system.
-W
you bring up an excellent point.
What if the data is streaming in nature and is not stored in a database and
outside of your control.
Another approach is to cache the data locally (in a database) and then use
SQL to filter it.
I decided not to use the database approach because of two reasons.
1. The database write operation may be expensive.
2. In the future I may decide apply more complex consequence to my rules
than just filtering.
Thanks.
--
View this message in context:
http://drools.46999.n3.nabble.com/Is-there-a-faster-way-of-doing-this-in-...
Sent from the Drools: User forum mailing list archive at Nabble.com.