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 practiceDate: Mon, 14 Jul
2008 14:24:02 +0100From: [EMAIL PROTECTED]: [email protected]
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
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of 9Lives
9LivesSent: 14 July 2008 13:41To: [EMAIL PROTECTED]: [rules-dev] Multi
threading usage best practice
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 BQuestion: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? TnXDotan
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