Dfh$xtse – IBM SC34-6814-04 User Manual
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Appendix F. The example program for the XTSEREQ global
user exit, DFH$XTSE
This appendix lists the example global user exit program, DFH$XTSE. The example
shows you how to:
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Use EXEC CICS commands in a global user exit program
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Use EXEC CICS commands and XPI calls in the same exit program
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Modify the command parameter list in EXEC interface exits such as XTSEREQ,
XICEREQ, and XFCREQ
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Modify Temporary Storage (TS) requests.
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* MODULE NAME = DFH$XTSE
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* FUNCTION =
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Example global user exit program to run at the XTSEREQ and
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XTSEREQC exits.
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* DESCRIPTION =
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The program gives examples of:
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1) Coding Exec Interface global user exits, showing how to
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modify and add parameters to the Command Parameter List.
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2) Issuing a mixture of EXEC CICS API and XPI calls within
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the same global user exit program.
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3) Modifying Temporary Storage requests, by renaming the queue
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name and allowing the SYSID to be added so that the request
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is routed to a queue-owning region (QOR).
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NOTE that this program is only intended to DEMONSTRATE the use
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of the TS request user exit XTSEREQ, and to show the sort of
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information which can be obtained from the exit parameter list.
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* IT SHOULD BE TAILORED BEFORE BEING USED IN A PRODUCTION ENVIRONMENT.*
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* NOTES =
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The important notes to remember when coding similar global user
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exits are:
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1) If the exit program modifies the Command Parameter List, you
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MUST ensure that the storage used for additional fields such
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as the SYSID is non-volatile. Here are examples of storage
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that is safe:
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a) Shared storage obtained by GETMAIN.
This should be
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obtained in the Request exit, and freed in the Request
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Complete exit..
The shared storage address can be passed *
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using the 4-byte token in the DFHUEPAR parameter list.
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b) Shared global work area storage.
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c) Storage obtained by using the LOAD HOLD option.
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d) TCTUA or CWA storage.
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Figure 134. Example exit program for the XTSEREQ exit (part 1)
© Copyright IBM Corp. 1977, 2011
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