[rules-users] dynamic rule creation - from database.

[hanumesh.m]

Hi 

 I need an example of using dynamic rules. Its very urgent. ( I am using
drools 4.0.3 )

 My application will poll a directory for a file(trade partners will drop
the file on server), which contains some mask(fileMask) in name which can
decide on the target Queue where the data of file should be directed to.

 If the trade partners are fixed then there is no problem, I can write .drl
file(fixed) with one rule for a trade partner and then I can fire the rules
to decide the target Queue.( .drl content followed )

 But new partners may add up by admin module, (which has details like
fileMask, toQueue, fromQueue etc. all these details are in database). When a
new trade partner added then my program should fire a rule for new trade
partner i.e new rule should be created at runtime(from database) for
fileMask, toQueue, fromQueue.

 Please suggest how should I write rule at runtime so that adding new
partner will not require changes in code and redeploy.

Here is .drl
----------------------------------------------------------------------
rule "Process 834"
	no-loop 
	when
		m: Message( fileName matches "^.*834.*$")
	then
		System.out.println( "Reading Rule for 834 ..." ); 
		m.setFromQ("INBOUND.834.EDI");
		m.setToQ("INBOUND.834.XML");
		m.setProcess("834");
		update( m );
end

rule "Process 850"
	no-loop 
	when
		m: Message( fileName matches "^.*850.*$")
	then
		System.out.println( "Reading Rule for 850 ..." ); 
		m.setFromQ("INBOUND.850.EDI");
		m.setToQ("INBOUND.850.XML");
		m.setProcess("850");
		update( m );
end

-----------------------------------------------------------------------
How to avoid writing these static rules and making them dynamic by fetching
from database.
I have already posted it but didn't got help so reposting the same again
hoping to have some luck this time

Thanks in advance,
Hanumesh
 
-- 
View this message in context: http://www.nabble.com/dynamic-rule-creation---from-database.-tp16300005p16300005.html
Sent from the drools - user mailing list archive at Nabble.com.