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Appendix E. The example program for the XTSEREQ global
user exit, DFH$XTSE
This appendix lists the example global user exit program, DFH$XTSE. The example
shows you how to:
v Use EXEC CICS commands in a global user exit program
v Use EXEC CICS commands and XPI calls in the same exit program
v Modify the command parameter list in EXEC interface exits such as XTSEREQ,
XICEREQ, and XFCREQ
v Modify Temporary Storage (TS) requests.
***********************************************************************
* *
* MODULE NAME = DFH$XTSE *
* *
* FUNCTION = *
* Example global user exit program to run at the XTSEREQ and *
* XTSEREQC exits. *
* *
* DESCRIPTION = *
* The program gives examples of: *
* 1) Coding Exec Interface global user exits, showing how to *
* modify and add parameters to the Command Parameter List. *
* 2) Issuing a mixture of EXEC CICS API and XPI calls within *
* the same global user exit program. *
* 3) Modifying Temporary Storage requests, by renaming the queue *
* name and allowing the SYSID to be added so that the request *
* is routed to a queue-owning region (QOR). *
* *
* ------------------------------------------------------------------- *
* NOTE that this program is only intended to DEMONSTRATE the use *
* of the TS request user exit XTSEREQ, and to show the sort of *
* information which can be obtained from the exit parameter list. *
* IT SHOULD BE TAILORED BEFORE BEING USED IN A PRODUCTION ENVIRONMENT.*
* ------------------------------------------------------------------- *
* *
* NOTES = *
* The important notes to remember when coding similar global user *
* exits are: *
* *
* 1) If the exit program modifies the Command Parameter List, you *
* MUST ensure that the storage used for additional fields such *
* as the SYSID is non-volatile. Here are examples of storage *
* that is safe: *
* a) Shared storage obtained by GETMAIN. This should be *
* obtained in the Request exit, and freed in the Request *
* Complete exit.. The shared storage address can be passed *
* using the 4-byte token in the DFHUEPAR parameter list. *
* b) Shared global work area storage. *
* c) Storage obtained by using the LOAD HOLD option. *
* d) TCTUA or CWA storage. *
Figure 113. Example exit program for the XTSEREQ exit (Part 1 of 16)
© Copyright IBM Corp. 1977, 1999 807