OTS 1.1 MAILINGLIST Avatar
  1. OMG Issue

OTS11 — TRANSACTION_UNAVAILABLE standard exception

  • Key: OTS11-22
  • Legacy Issue Number: 3773
  • Status: open  
  • Source: ZeroC ( Bernard Normier)
  • Summary:

    In its updates to the Transaction Service and the CORBA Core, the Messaging
    final submission (orbos/98-05-06) defines a new standard exception,
    TRANSACTION_UNAVAILABLE [orbos/98-05-06, 9.2.2]

    It also defines a single situation where this new standard exception is raised:
    when the receiving ORB is in the OTS_NOT_CONNECTED state and the request
    carries a transaction context.

    It is not clear if an ORB that has never heard of OTS is considered to be
    always in this OTS_NOT_CONNECTED state, and hence has to check that the
    requests it receives do not carry a transaction context.

    If yes, then this checking requirement belongs to the CORBA core, not the
    OTS spec. And since a compliant OTS 1.1 implementation can propagate tx
    contexts whenever it can, a positive answer would probably break a
    number of applications.

    The messaging final submission defines TRANSACTION_UNAVAILABLE as follows
    [orbos/98-05-06, 9.5.1.3]:
    ! TRANSACTION_UNAVAILABLE Exception
    ! The CosTransactions module adds the TRANSACTION_UNAVAILABLE exception
    ! that can be raised by the ORB when it cannot process a transaction service
    ! context because its connection to the Transaction Service has been
    ! abnormally terminated. This exception is to be defined in Chapter 3 of the
    ! Common Object Request Broker Architecture and Specification.

    (Note that in this paragraph the TRANSACTION_UNAVAILABLE is described as
    a user exception in the CosTransactions – I consider this a typo!)

    The strange thing is that the OTS spec specifies (or almost specifies –
    see issue #2935) how an OTS implementation registers itself with an
    ORB (using the TSIdentification interface), but there is no deregister
    or disconnect operation. How can the ORB find out that the connection
    to the transaction service has been terminated?

  • Reported: OTS 1.0b1 — Fri, 4 Aug 2000 04:00 GMT
  • Updated: Fri, 6 Mar 2015 20:57 GMT