BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  must i synchronized the access to the STATEFUL session bean?          BorlandTalk.com Forum Index -> JBuilder Enterprise View previous topic :: View next topic   Author Message zbcong Guest Posted: Tue Sep 02, 2003 10:27 am    Post subject: must i synchronized the access to the STATEFUL session bean? hello there is a class named "WebClientControllerImpl" in the petstore1.3,it is a proxy between the web tier and the ejb tier,in the statement,it tell me: quote: -------------------------------------------------------------------------------- all the method that access the ejb are synchronized,so that concurrent requests do not happen to the stateful session bean. -------------------------------------------------------------------------------- why,i wonder if the access to the STATEFUL session bean must be synchronized?who can tell me? thank you! Back to top Kevin Dean Guest Posted: Tue Sep 02, 2003 4:43 pm    Post subject: Re: must i synchronized the access to the STATEFUL session b Taking the quote apart... "all the method that access the ejb are synchronized" This means that the client, not the EJB tier, is handling the synchronization. "so that concurrent requests do not happen to the stateful session bean" Concurrent requests to a stateful session bean are expressly forbidden; you cannot have two clients calling a single stateful session bean (they can each call a different stateful session bean of the same type, but as they are being served by different instances everything should be fine). If two clients (or the same client with multiple threads) try to call the same stateful session bean, the second one call will fail with an exception. This does not apply to stateless session beans as the container will simply create a second instance of the stateless session bean to service the second call. -- Check out our latest white papers at http://www.datadevelopment.com/papers/index.html BladeNET Scores With Borland Enterprise Tools Team Development with JBuilder and Borland Enterprise Server Dolphin Data Development Ltd. http://www.datadevelopment.com/ "zbcong" <zhebincong (AT) 163 (DOT) net> wrote Quote: hello there is a class named "WebClientControllerImpl" in the petstore1.3,it is a proxy between the web tier and the ejb tier,in the statement,it tell me: quote: -------------------------------------------------------------------------- ------ all the method that access the ejb are synchronized,so that concurrent requests do not happen to the stateful session bean. -------------------------------------------------------------------------- ------ why,i wonder if the access to the STATEFUL session bean must be synchronized?who can tell me? thank you! Back to top        BorlandTalk.com Forum Index -> JBuilder Enterprise All times are GMT Page 1 of 1 Powered by phpBB © 2001, 2006 phpBB Group .