Re: [rules-users] dynamic rule creation - from database.
You could try the BRMS and the RuleAgent.
Mark
hanumesh.m wrote:
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