Generic One-phase Commit for ODBC RM Switch Module

Provides the information required to build the generic one-phase commit for ODBC RM switch module.
Restriction: This topic applies only when the Enterprise Server feature is enabled.
Source Code
The generic one-phase commit for ODBC RM switch module COBOL source file, ESODBCXA.CBL is located by default in the $COBDIR/src/enterpriseserver/xa directory.
Note: If you prefer to supply user credentials programatically rather than in the xa_open string, instructions for doing so are provided in the COBOL source file in the Customization section.
Build Requirements
The build script uses the current effective working mode to determine how to build the switch module. Before invoking the build script, ensure that your database environment is set up correctly. For details see your database vendor's documentation.
Building the Switch Module
The $COBDIR/src/enterpriseserver/xa directory contains the build script file that you can use to build the switch module.
  1. Copy all files from the $COBDIR/src/enterpriseserver/xa directory (default location) to any location where you have WRITE permission.
  2. Change to the directory containing the copied files.
  3. Enter build odbc
Build Output
The build process produces four binary RM switch module files from the ESODBCXA.CBL COBOL source file:
ESODBCXA.so 32-bit static
ESODBCXA64.so 64-bit static
ESODBCXA_D.so 32-bit dynamic
ESODBCXA64_D.so 64-bit dynamic

You can register an RM switch module with Enterprise Server dynamically, or register it statically depending on which binary file you use. Micro Focus recommends that you use the dynamic switch module option, as this ensures that only active databases used in the global transaction participate in the TM/RM XA flow.

Limitations
The ODBC module supports only a one-phase commit, therefore the following SQL operations are not supported in the source for your deployed container-managed service:
  • CONNECT
  • DISCONNECT
  • BEGIN TRANSACTION
  • COMMIT
  • ROLLBACK
Additional Resources
For more information on using the ODBC RM switch module, including the xa_open string definition, see Generic One-phase Commit for ODBC RM xa_open string.