RE: [rules-dev] Multi threading usage best practice

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: manstis1(a)ford.comTo: rules-dev(a)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 From: rules-dev-bounces(a)lists.jboss.org [mailto:rules-dev-bounces@lists.jboss.org] On Behalf Of 9Lives 9LivesSent: 14 July 2008 13:41To: rules-dev(a)lists.jboss.orgSubject: [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 Invite your mail contacts to join your friends list with Windows Live Spaces. It's easy! Try it! _________________________________________________________________ Discover the new Windows Vista http://search.msn.com/results.aspx?q=windows+vista&mkt=en-US&form...