Activity monitoring exits

In the ISPF configuration table keyword file, this exit is set with keyword ACTIVITY_MONITORING_PROGRAM_EXIT.

The activity monitoring exits provide monitoring information for these PDF functions:

The activity monitoring exit routine is given control at the start and end of each command or function.

Exit parameters

PDF uses these parameters to communicate with the monitoring exit.

Table 1. Details of the parameters used to communicate with the monitoring exit
Parameter	Type	Len	Description	Modifiable
EXIT ID	FIXED	4	Numeric code for the exit point.	No
COMMAND/ SUB-FUNCTION ADDRESS	PTR	4	Storage location containing the command name or sub-function identifier.	No
COMMAND/ SUB-FUNCTION LENGTHS	FIXED	4	Length of the command name or sub-function identifier. The value ranges from 1-255.	No

Activity monitoring exits are the same for VIEW as for EDIT. From within the VIEW function, the primary and line commands are monitored exactly like they are from EDIT.
A single exit routine is allowed for all monitoring PDF exit points. The name of the module is placed into the ISPF configuration table when the product is installed.
31-bit addressing must be supported by the exit routine as it is given control in AMODE 31. ISPF/PDF does not restrict the RMODE of the exit, but RMODE ANY is recommended.
Standard OS linkage conventions are used to branch to the exit routine that is defined.
You can make PDF service calls from within the exit routine, with the exception of those services that could cause recursion (for example, calling the EDIT service for an EDIT primary command exit call).
You cannot activate or deactivate the exit while an PDF session is in progress. You can make changes to the exit routine load module at any time, but because PDF loads the module only once at session initialization, the changes are not recognized until the next ISPF session.
PDF does not provide data areas. You can use a predetermined ddname as a work area. The ISPF initialization exit could allocate and open a data set to this ddname. Each PDF exit could read and write to the data set as needed. The ISPF termination exit could close and free the data set.