- Hewlett-Packard Printer User Guide

Using the VPO Application Programming Interfaces
The VPO Interfaces
Chapter 4186
Figure 4-7 Overview of the Interface APIs
msg
queue
msg
queue
msg
queue
Message Manager
msg
allowed for
output
msg
queue
OPCSVIF_
EXTAGT_
MESSAGE
OPCSVIF_
EXTMSGPROC_
READ
OPCSVIF_
EXTMSGPROC_
READWRITE
output
on interface
enabled
OPCSVIF_
EXTMSGPROC_
WRITE
(Correlation
(Correlation engine;
(write command for
correlation engines)
no
yes
frontend)
output
mode
no output
copy to / divert to
correlation interface)
copy to
no READWRITE interface open
OPCSVIF_
EXTAGT_
ACTION_
OPCSVIF_
EXTAGT_
ACTION_
REQUEST RESPONSE
VPO
Action
Manager
VPO
Message
Receiver
action
queue
msg
action request
action rsp.
action response
action request
action
queue
Managed
Node
(Agent as external message source)
me
queue
OPCSVIF_
MSG_EVENTS
(external message
processing tool)
appresp
queue
OPCSVIF_
APPLIC_
(external application
processing tool)
RESPONSE
Display Manager
Message Events
to GUIs to GUIs
Application Responses