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Table 12. Valid return codes for a TRUE invoked by the CICS syncpoint manager
Request-type Return codes Meaning
UERTPREP
UERFPREP Phase 1 of 2-phase commit successful
UERFBACK Phase 1 of 2-phase commit unsuccessful
UERTWAIT None Not applicable
UERTCOMM
UERFDONE Phase 2 of 2-phase commit successful
UERFHOLD Phase 2 of 2-phase commit unsuccessful
UERTBACK
UERFDONE Backout successful
UERFHOLD Backout unsuccessful
UERTONLY
UERFOK Single-phase commit successful
UERFBOUT Single-phase commit failed and backed out
UERTELUW None Not applicable
What is expected of your resource manager
If every request from the syncpoint manager prompts a meaningful response from
the resource manager, CICS ensures that changes to recoverable resources (such
as databases) can be synchronized. That is, either all the changes take effect or all
are backed out, even across system failures.
Limitations
Do not update a recoverable CICS resource during a syncpoint call because any
changes will not be seen by the CICS syncpoint manager.
Sample code for a TRUE invoked by the CICS syncpoint
manager
The pseudocode given in Figure 8 on page 273 is only an example. It is not
complete, and includes only some of the conditions that a task-related user exit
invoked at a syncpoint might be required to check.
the task-related user exit program
272
CICS TS for OS/390: CICS Customization Guide
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