ViewPoint Manual

Functional Description
ViewPoint Manual—426801-001
5-31
Event Display Operations
System components (one each in any NCN) consist of the following: two event
collection servers (one for last events, the other for all other events) and the ViewPoint
TCP and its program subvolume. (There is also a ViewPoint data subvolume, not
shown.)
The event collection servers store filtered event messages in the single primary-events
cache and the alternate-events caches for each operator. These messages are then passed
to the ViewPoint TCP for display.
The ViewPoint TCP is described in the overview earlier in this section. As stated there,
ViewPoint TCP is the terminal control process of a Pathway application. The terminal-
management function routes information to and from each operator. The code-
management function manages the multithreaded execution of the application programs
for each operator. The message-management function communicates with the
remainder of the system.
The operator’s default subvolume contains the operator’s TACLCSTM, ZZVPSTAT, and
ZZVPEVNT files, and a ZZVPCLIP file for saving copies of displayed screen
information.
The ViewPoint program subvolume contains the ViewPoint application programs
(SCREEN COBOL programs) and filters FLTRDFLT and FLTRLAST. The ViewPoint
data subvolume contains the event-detail database and the event and status caches.
Figure 5-22. Event Presentation Processes for Two Operators
CDT522.cdd