Hi Yajun, ----- Original Message ----- From: "Yajun Liu" <[EMAIL PROTECTED]> To: "OJB Users List" <[EMAIL PROTECTED]>; "Armin Waibel" <[EMAIL PROTECTED]> Sent: Wednesday, June 11, 2003 7:10 AM Subject: Re: Multiple threads using one broker
> Does closing broker close database connection? If yes, then it is too > expensive. broker.close() does - return the PB instance back to PB-pool - close the connection, BUT 'normal' connections are pooled too (mean con.close() return connection back to pool) in OJB by default. Except using DataSource. OJB does never pool DataSources, but DataSources are handles to a real connection (and normally they are pooled too) regards, Armin > > --Yajun > > ----- Original Message ----- > From: "Armin Waibel" <[EMAIL PROTECTED]> > To: "OJB Users List" <[EMAIL PROTECTED]> > Sent: Tuesday, June 10, 2003 4:20 PM > Subject: Re: Multiple threads using one broker > > > > Hi Denis, > > > > ----- Original Message ----- > > From: "Denis Avdic" <[EMAIL PROTECTED]> > > To: "OJB Users List" <[EMAIL PROTECTED]> > > Sent: Tuesday, June 10, 2003 9:40 PM > > Subject: Multiple threads using one broker > > > > > > > Hi, > > > > > > I am using OJB with Struts and I have a number of actions that use > > > persistence broker calls to retrieve and store data. > > > > > > Now, if I have a number of users using the application, all users > > share > > > the same broker. > > > > PersistenceBroker instance itself is not threadsafe. For this reason > > OJB use a PB-pool to allow a per thread handling of PB instances. > > Mean each user should get his own PB instance. Get the broker, > > do the work, close the broker. Or you have > > to synchronize user action. > > > > regards, > > Armin > > > > > Thus I get collisions where one user would begin a > > > transaction then another would begin a transaction (and get an > > > exception) and then first user would commit transaction, and when the > > > second user would try to commit transaction I get an error. > > > > > > What can I do to fix this, is there anything in the configuration I > > can > > > do, or does anyone have a trick for this? > > > > > > my broker is a regular broker I get by calling > > > PersistenceBrokerFactory.defaultPersistenceBroker(); > > > > > > TIA, > > > > > > Denis > > > > > > > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > > > > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
