EJB 2.0 2PC

Discussions

EJB design: EJB 2.0 2PC

  1. EJB 2.0 2PC (4 messages)

    Hi there,
    Does anybody know if the 2 phase commit is mandatory in EJB 2.0?...thanks

    Threaded Messages (4)

  2. EJB 2.0 2PC[ Go to top ]

    It is not mandatory at all...
  3. EJB 2.0 2PC[ Go to top ]

    Hi,
    i definetly support Tyler, some more information :

    Currently J2EE only supports flat transactions, a flat transaction cannot have child transaction nested in it.

    Two-phase commit protocol, currently J2EE only supports access to a single JDBC database in a transaction, but the implementation vendors can include extra transactional capabilities, example: J2EE SDK supports access to multiple databases in a single transaction using a two phase commit protocol.
    So for your transaction to be purely J2EE standard based, its always better to go for a one-phase commit( so that u dont restrict the application to a single application server with extra transactional capabilities, there by restricting the portability)
    Hope this helps :)
  4. EJB 2.0 2PC[ Go to top ]

    The new specs explicitely state that only flat transaction model will be supported in the future...The nested transactions will be not supported...The 2PC though is not a nested transaction...am I correct?
  5. EJB 2.0 2PC[ Go to top ]

    Yes u r...:)