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capable of waiting for in-doubt resolution. This applies to local resources
such as files, and also other RMCs, such as LU6.1, LU6.2, or MRO
connections to other systems.
v An inbound RESYNC command from a resource manager that requests
resynchronization for a UOW that CICS was in-doubt about, results in
CICS invoking the task-related user exit with a forced decision.
SHUTDOWN
specifies that the exit program is to be invoked at CICS shutdown.
SPI specifies that the exit program is to be invoked to satisfy EXEC CICS
INQUIRE EXITPROGRAM calls that specify the CONNECTST or
QUALIFIER options. Use this option to enable user programs to discover
whether the exit program is connected to its resource manager, and what
its entryname qualifier is.
Note: The exit program can set this option dynamically, by setting the
UEFMSPI bit-mask in the schedule flag word.
For programming information about the EXEC CICS ENABLE PROGRAM
command, refer to ENABLE PROGRAM, in the CICS System Programming
Reference manual.
The administration routines
As well as being enabled before they can be used, task-related user exit programs
should be disabled when you have finished using them. You should prepare
procedures (the administration routines) for enabling and disabling your task-related
user exit programs, using the EXEC CICS ENABLE and DISABLE commands, and
for resynchronizing between sessions or after a system failure. Your enabling
routines could be PLT initialization programs or online programs. Your disabling
routines could, for example, be started by a TRUE invoked at CICS termination.
The EXTRACT EXIT command obtains the address and the length of a global work
area that is owned by, or shared by, a named task-related user exit program.
For programming information about these system commands, and the rules
governing them, and also about resynchronization, refer to the CICS System
Programming Reference manual.
Tracing a task-related user exit program
CICS outputs a trace entry just before control is passed to the task-related user exit
and just after returning from the exit. You can control these trace entries using the
RI option of the CETR trace control transaction or the EXEC CICS SET
TRACETYPE command.
304 Customization Guide