When the XZIQUE exit is invoked
The XZIQUE global user exit is invoked, if it is enabled, at the following
times:
- Whenever CICS® tries to acquire a session with a remote system and there is no
free session available. It is invoked whether or not you have specified the
QUEUELIMIT option on the CONNECTION definition, and whether or not the limit
has been exceeded. It is not invoked if the allocate request specifies NOQUEUE
or NOSUSPEND.
Requests for sessions can arise in a number of ways, such as explicit EXEC CICS ALLOCATE commands issued by DTP programs, or by transaction routing or function shipping requests.
- Whenever an allocate request succeeds in finding a free session, after the queue on the connection has been purged by a previous invocation of the exit program. In this case, your exit program can indicate that CICS is to continue processing normally, resuming queuing when necessary.