According to the X/Open distributed transaction model, support for distributed transactions relies upon a distributed transaction manager which tracks and manages operations performed by one or more resource managers. With Message Queue 4.2, the Message Queue C-API supports the XA interface (between a distributed transaction manager and Message Queue as a XA-compliant resource manager), allowing Message Queue C-API clients running in a distributed transaction processing environment (such as BEA Tuxedo) to participate in distributed transactions.
This distributed transaction support consists of the following new C-API functions (and new parameters and error codes) used to implement the XA interface specification:
If a C-client application is to be used in the context of a distributed transaction, then it must obtain a connection by using MQGetXAConnection() and create a session for producing and consuming messages by using MQCreateXASession(). The start, commit, and rollback, of any distributed transaction is managed through APIs provided by the distributed transaction manager.
For details of using the distributed transaction functions, see Working With Distributed Transactions in Sun Java System Message Queue 4.3 Developer’s Guide for C Clients.
Message Queue 4.2 provides programming examples based on the Tuxedo transaction manager. For information on the use of these sample programs, see Distributed Transaction Sample Programs in Sun Java System Message Queue 4.3 Developer’s Guide for C Clients.
The distributed transaction functionality is supported on Solaris, Linux, and Windows platforms, however, to date it has only been certified on the Solaris platform.