TnX Mike 4 the quick response.
I'm afraid that u r
right regarding the through-put ;-(
Using the "synchronized" method will
probably solve my problem but will damage the solution.
If u have
any other thoughts on the matter i would love 2 hear
them.
Regards
Dotan
Subject: RE: [rules-dev] Multi threading usage best practice
Date: Mon,
14 Jul 2008 14:24:02 +0100
From: manstis1@ford.com
To:
rules-dev@lists.jboss.org
Hi,
Would synchronising on working memory effectively serialise the
effects of fireAllRules()?
...
synchronised(wm) {
wm.fireAllRules();
}
...
I don't know whether this would kill your through-put
either.
Cheers,
Mike
Hello
I'm using Drools 4.0.7 inside a mail relay
application 2 determine the operations that need 2 b executed on each
passing message.
To do this i'm using the following scenario:
-
I have a ruleBase.newStatefulSession().
-
I have a fixed set of facts.
-
I have a fixed set of rules.
-
Each mailer (a thread that is handling a single message) is inserting
the message to the working memory, calls the "fireAllRules" method and
retracts the message.
-
Rules that r executed change custom attributes in the
message.
Problem:
I noticed that sometimes a rule can b
executed on the same message more then once.
Assumption:
My
guess is that because i'm working is a multi threading environment
but using a stateful session, what happens is:
- Thread A is inserting Message A.
- Thread B is inserting Message B
- Thread A is calling fireAllRules
- Rule X is executed on messages A + B.
- Thread B is calling fireAllRules
- Rule X is executed on messages A + B
- Thread A is retracting Message A
- Thread B is retracting message B
Question:
My goal is 2 make
sure a rule is executed only once on a single message.
Any ideas on how 2
avoid the situation described
above?
TnX
Dotan
Invite your mail contacts to join your friends list with Windows Live
Spaces. It's easy! Try it!
Discover the new Windows Vista Learn more!