RE: Antwort: RE: Transactions with PB-API
Hi Lasse, Poet has excellent material on ODMG in their community area: http://community.fastobjects.com/community_documentation_oss61.htm You have to sign in, but it's really worth it. cheers, Thomas > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: Thursday, September 11, 2003 2:43 PM > To: OJB Users List > Subject: Antwort: RE: Transactions with PB-API > > > > Hello Oliver, > > no, I wanted to use several threads, each having an own transaction. > I just missed the fact that I can get several brokers from the > factory. It works fine now. > > Btw, are there any resources about the ODMG standard available online > (beside the book referral on the odmg-website...) ? > > Lasse > > > > > > |-+---> > | | [EMAIL PROTECTED]| > | | de | > | | | > | | 11.09.03 09:26 | > | | Bitte antworten | > | | an "OJB Users | > | | List" | > | | | > |-+---> > > >- > --| > | > | > |An: [EMAIL PROTECTED] > | > |Kopie: > | > |Thema: RE: Transactions with PB-API > | > > >- > --| > > > > Hello, > > > -Original Message- > > From: Roland Carlsson [mailto:[EMAIL PROTECTED] > > > > the broker have tre methods to handles transactions.. > > > > beginTransaction(); > > broker.commitTransaction(); > > broker.abortTransaction(); > > > > how can I use several (concurrent) transactions using the PB-API. > > > With the ODMG-API I do something like > > > > > > Transaction tx = odmg.newTransaction(); > > > tx.begin(); > > > ... > > do you plan to have several transactions in the same thread? > > In the ODMG standard, there is the concept of the "current > transaction" > of a given thread, i.e., there is an association between the threads > and transactions. For the sake of ODMG, it is advisable to have > one thread per one transaction and, conversely, one transactiob per > thread. (I am talking about concepts, I have not experiences > about what OJB does). > > For the PersistenceBroker API, there is a similar association, but I > do > not know exactly what happens if several thread share one txn or vice > > versa. So I would give the same advice. > > Olli > > - > 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]
Antwort: RE: Transactions with PB-API
Hello Oliver, no, I wanted to use several threads, each having an own transaction. I just missed the fact that I can get several brokers from the factory. It works fine now. Btw, are there any resources about the ODMG standard available online (beside the book referral on the odmg-website...) ? Lasse |-+---> | | [EMAIL PROTECTED]| | | de | | | | | | 11.09.03 09:26 | | | Bitte antworten | | | an "OJB Users | | | List" | | | | |-+---> >---| | | |An: [EMAIL PROTECTED] | |Kopie: | | Thema: RE: Transactions with PB-API | >---| Hello, > -Original Message- > From: Roland Carlsson [mailto:[EMAIL PROTECTED] > > the broker have tre methods to handles transactions.. > > beginTransaction(); > broker.commitTransaction(); > broker.abortTransaction(); > > how can I use several (concurrent) transactions using the PB-API. > > With the ODMG-API I do something like > > > > Transaction tx = odmg.newTransaction(); > > tx.begin(); > > ... do you plan to have several transactions in the same thread? In the ODMG standard, there is the concept of the "current transaction" of a given thread, i.e., there is an association between the threads and transactions. For the sake of ODMG, it is advisable to have one thread per one transaction and, conversely, one transactiob per thread. (I am talking about concepts, I have not experiences about what OJB does). For the PersistenceBroker API, there is a similar association, but I do not know exactly what happens if several thread share one txn or vice versa. So I would give the same advice. Olli - 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]
RE: Transactions with PB-API
Hello, > -Original Message- > From: Roland Carlsson [mailto:[EMAIL PROTECTED] > > the broker have tre methods to handles transactions.. > > beginTransaction(); > broker.commitTransaction(); > broker.abortTransaction(); > > how can I use several (concurrent) transactions using the PB-API. > > With the ODMG-API I do something like > > > > Transaction tx = odmg.newTransaction(); > > tx.begin(); > > ... do you plan to have several transactions in the same thread? In the ODMG standard, there is the concept of the "current transaction" of a given thread, i.e., there is an association between the threads and transactions. For the sake of ODMG, it is advisable to have one thread per one transaction and, conversely, one transactiob per thread. (I am talking about concepts, I have not experiences about what OJB does). For the PersistenceBroker API, there is a similar association, but I do not know exactly what happens if several thread share one txn or vice versa. So I would give the same advice. Olli - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Transactions with PB-API
Hi Lasse! You get several instances of PersistenseBroker. Each broker handles on transaction at a time. the broker have tre methods to handles transactions.. beginTransaction(); broker.commitTransaction(); broker.abortTransaction(); Regards Roland Carlsson - Original Message - From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, September 10, 2003 12:53 PM Subject: Transactions with PB-API > Hello everybody, > > how can I use several (concurrent) transactions using the PB-API. > With the ODMG-API I do something like > > Transaction tx = odmg.newTransaction(); > tx.begin(); > ... > > Lasse > > > > - > 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]
Transactions with PB-API
Hello everybody, how can I use several (concurrent) transactions using the PB-API. With the ODMG-API I do something like Transaction tx = odmg.newTransaction(); tx.begin(); ... Lasse - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
