You can code components (and clients) to initiate and complete transactions using the OTS (Object Transaction Service) CosTransactions::Current or CosTransactions::TransactionFactory interfaces.
In order to use OTS, you must enable EAServer to use
the OTS/XA transaction coordinator. See Chapter
3, “Creating and Configuring Servers,” in
the EAServer System Administration Guide for
more information.
To use the functionality of these interfaces, include CosTransactions.hpp in your source file.
To explicitly use transactions in a component or client, use the CosTransactions::Current interface to perform these tasks.
Task |
Call this method |
Catch these exceptions |
|---|---|---|
Start a transaction. |
begin |
SubtransactionsUnavailable |
Temporarily stop a transaction. |
suspend |
None |
Resume a suspended transaction. |
resume |
InvalidControl |
Commit a transaction. |
commit |
NoTransaction, HeuristicMixed, HeuristicHazard |
Roll back a transaction. |
rollback |
NoTransaction |
Make the only possible outcome of the transaction a rollback. |
rollback_only |
NoTransaction |
Roll back a transaction after a specified amount of time has elapsed without any response. |
set_timeout |
None |
Retrieve a transaction’s status. |
get_status |
None |
Retrieve a transaction’s name. Use this method when you need to debug transactions. |
get_transaction_name |
None |
Using factories
The TransactionFactory interface is included
in EAServer only to maintain compatibility with the CORBA OTS specification—Sybase
recommends that you use the CosTransactions::Current interface
to create explicit transactions.
Sybase recommends that you use suspend with
caution so as not to conflict with the EAServer component model.
For example, do not use suspend to take control
of a transaction that it does not control.
