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
%ProgramFiles(x86)%\Micro Focus\Visual COBOL\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
- To build the ODBC RM switch module, you must have the Windows Software Development Kit (SDK) installed for your version of
Windows.
Before building this switch module, ensure that your LIB environment variable contains the path to the
odbc32.lib file, located in a subdirectory under your Windows SDK LIB directory.
Some OpenESQL directives are process-based, and typically need to be set in within the code of the program that makes the
database connection.
If you are executing services under
Enterprise Server that are deployed as container-managed applications, the applicable directives must be specified when compiling the RM switch
module, rather than when compiling your program source. For more information, see the list of Process-based OpenESQL directives
in the topic
Scope - OpenESQL SQL Compiler Directive Options.
- Building the Switch Module
-
- Method 1
-
- Start a
Visual COBOL command prompt, 32-bit or 64-bit depending on the application, running as an administrator.
- Change to the
%ProgramFiles(x86)%\Micro Focus\Visual COBOL\src\enterpriseserver\xa directory (default location).
- Enter
build odbc [directives]
- Method 2
-
- Start a
Visual COBOL command prompt, 32-bit or 64-bit depending on the application.
- Copy all files from the
%ProgramFiles(x86)%\Micro Focus\Visual COBOL\src\enterpriseserver\xa directory (default location) to any location where you have WRITE permission.
- Change to the directory containing the copied files.
- Enter
build odbc [directives]
- Build Output
- The build process produces two binary RM switch module files from the
ESODBCXA.CBL COBOL source file:
| File
|
Type
|
| ESODBCXA.DLL
|
static
|
| ESODBCXA_D.DLL
|
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.