Re: Problem of multiple clients request concurrently 1 session stateful bean

[Juan Pablo Lorandi]

Title: Message

Solutions for this case compromise scalability & performance. You could roll out your own solution, there's plenty of examples in Tenembaun's white book. Building customized semaphores and mutexes would be part of the solution, I guess.   Don't overlook the fact that throwing an exception when concurrent access of a SFSB actually is a solution to your problem. Simply adding code that retries the operation may be all you want. Again, that depends on which context you're attempting this. Is your bottleneck (SFSB) by choice? Are you using it as a DAO/Cache?   Juan Pablo Lorandi Chief Software Architect Code Foundry Ltd. [EMAIL PROTECTED] Barberstown, Straffan, Co. Kildare, Ireland. Tel: +353-1-6012050  Fax: +353-1-6012051 Mobile: +353-86-2157900 www.codefoundry.com   Disclaimer:   Opinions expressed are entirely personal and bear no relevance to opinions held by my employer. Code Foundry Ltd.'s opinion is that I should get back to work. -----Original Message----- From: A mailing list for Enterprise JavaBeans development [mailto:[EMAIL PROTECTED] On Behalf Of Le Quang Tu Sent: Tuesday, August 19, 2003 6:27 PM To: [EMAIL PROTECTED] Subject: Re: Problem of multiple clients request concurrently 1 session stateful bean yeah , I see , the fork must be an entity. But I want to know there is any other solution for this case ----- Original Message ----- From: James Hicks To: [EMAIL PROTECTED] Sent: Tuesday, August 19, 2003 6:48 PM Subject: Re: Problem of multiple clients request concurrently 1 session stateful bean It is against the spec for > 1 client to access a stateful session bean.  You will need to rethink your design.   James Hicks -----Original Message----- From: Le Quang Tu [mailto:[EMAIL PROTECTED] Sent: Monday, August 18, 2003 11:03 AM To: [EMAIL PROTECTED] Subject: Problem of multiple clients request concurrently 1 session stateful bean Hi all, There is any solution to solving the problem of multiple clients request concurrently one instance session stateful bean?  For example for the well known dining philosopher example, . The philosophers and the forks are designed  as session stateful beans. So there is the situation of  two philosophers use the same fork. It means 2 instance of SFSB philosopher request the same instance of SFSB fork and the EJB Container will throw the exception with the following message: "The Session Bean are executing another request". It is normal according to the specification of EJB. However , I'am looking for the solution to solve this problem. Could you guys help me or recommend me something on that?. Best regards   =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff EJB-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help". =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff EJB-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help". =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff EJB-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help". =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff EJB-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".