This sequence diagram shows the interaction between a UCH, TA and UIPM during an open control session. Note that indentation reflects nesting of calls.

General remark:

• For simplicity, we assume that the UCH object itself is the UIPMListener and TAListener. In general, these might be separate objects.

Sequence of actions:

• A TA is loaded, initialized and a target registered (see diagram on Target Discovery above). A session is opened (see diagram on Session Management above).
• A UIPM is loaded, and opens a session. See diagram on Session Management above.

Part A: UIPM asks for labels and values

• UIPM calls UCH: Map[] getResources(string sessionId, Map[] resProps)
  • UCH retrieves resources from local or remote locations. Caching may occur.
  • UCH calls TA (only if dynamic resources are involved): Map[] getDynRes(string sessionId, Map[] resProps)
• UIPM displays labels.
• UIPM calls UCH: Map getValues(string sessionId, string[] paths)
  • UCH calls TA: Map getValues(string sessionId, string[] paths)
• UIPM displays values.

Part B: Target updates values

• Target changes state, triggered by some events.
• TA calls UCH: void updateValues(string[] sessionIds, string[] paths, string[] operations, string[] values, boolean[] hasDynRes)
  • UCH calls UIPM: void updateValues(string[] sessionIds, string[] paths, string[] operations, string[] values, boolean[] hasDynRes)
    • UIPM calls UCH: Map[] getResources(string sessionId, Map[] resProps)
      • UCH calls TA: Map[] getResources(string sessionId, Map[] resProps)
    • UIPM displays new values (and labels if dynamic resources are involved).

Part C: UIPM sets values and/or invokes commands

• UIPM calls UCH: Map setValues(string sessionId, string[] paths, string[] operations, string[] reqValues)
  • UCH calls TA: Map setValuesRequest(string sessionId, boolean isValidated, string[] paths, string[] operations, string[] reqValues)
• UIPM displays new values triggered by the request.

Part D: Notification raised by target and acknowledged by UIPM

• Target wants to notify the user about something.
• TA sets the notification's state to "active" by calling updateValues on UCH: void updateValues(string[] sessionIds, string[] paths, string[] operations, string[] values, boolean[] hasDynRes)
  • UCH calls UIPM: void updateValues(string[] sessionIds, string[] paths, string[] operations, string[] values, boolean[] hasDynRes)
    • UIPM displays notification to the user. If explicit acknowledgement is requested, the UIPM prompts the user to acknowledge. In any case, the UIPM sends an acknowledgment to the target.
    • UIPM acknowledges notification by calling setValuesRequest on UCH: Map setValues(string sessionId, string[] paths, string[] operations, string[] reqValues)
      • UCH calls TA: Map setValues(string sessionId, string[] paths, string[] operations, string[] reqValues)
    • UIPM closes notification display.