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Notes about the use of XNQEREQ to alter ENQ or DEQ scope.
1. XNQEREQ enables you to allow existing applications to be converted to use
sysplex enqueues without changing the application.
Note: Use of either the ENQMODEL resource definition or the user exit allows
this in most cases, but those applications where the resource name is
determined dynamically and not known in advance can only be so
converted by use of this exit.
2. Sysplex and region scope enqueues use separate namespaces. A region scope
enqueue will never wait on a sysplex enqueue, nor will a sysplex scope
enqueue wait on a region enqueue.
Note: This situation can only arise when you use the exit. Use of the
ENQMODEL resource definitions as your only method of defining the
SCOPE of an ENQ or DEQ avoids this potential risk.
3. Both region and sysplex scope are supported for string ENQs, but sysplex
scope is not supported for address ENQs.
enqueue EXEC interface program exits
64
CICS TS for OS/390: CICS Customization Guide
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