Say I have the following case: 1. a session bean queries with ejb ql for entity beans with a specific property value. name the property 'foo' and the value 'bar'. It queries the entities whose foo property is null, selects the first and sets its value to bar
2. two threads call the session bean: a. thread-a does the query, gets an entity, changes its value to bar. b. in the meanwhile, thread-b also does the same and therefore gets the same entity bean. 3. say the session bean's method is synchronized (inside of it, there is a synchroniztion). this doesn't help, since jboss only commits the changes once the method returns, so when thread-a steps out of the synchronization block, thread-b steps in, before jboss commits the changes. what is the solution to this? transactions? (i've tried RequiresNew, with no luck) or syncrhonizing before the call to the session bean (rather than in it)? this means every client needs to add this synchronization.. please help, thank you, ittay -- ======================================= Ittay Dror ([EMAIL PROTECTED]) User Space, R&D Qlusters Inc. Tel: +972-3-6081956 Fax: +972-3-6081841 ------------------------------------------------------- This SF.Net email sponsored by: Parasoft Error proof Web apps, automate testing & more. Download & eval WebKing and get a free book. www.parasoft.com/bulletproofapps1 _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
