Is there anything in the event itself which will tell us that we have already unsubscribed to thi...

Akechi Sato

...s handle/RIC?

When
the application unsubscribes an item, we continue to get updates for an item
after that. Is there anything in the event itself which will tell us that we
have already unsubscribed to this handle/RIC?

veerapath.rungruengrayubkul

Once application unsubscribes an item via unregisterClient call, RFA might dispatch
additional events that were in flight due to race condition. To determine if
the item unsubscription is completed and there is no longer event received,
application needs to register for Completion event. The Completion event is the
final event generated by RFA for the unregistered item.

However, if event stream is closed by provider, the Completion
event will not be generated. Application should call the isEventStreamClosed function
on events to determine whether the event stream is closed or not. The
isEventStreamClosed function call on a final event including the Completion
event always returns true.

The Completion event can be set via the last parameter on the
Session::createOMMConsumer() method.

virtual
OMMConsumer* rfa::sessionLayer::Session::createOMMConsumer 
(              
               const rfa::common::RFA_String& name,
               bool wCompEvents = false 
)

Below is the related information in the RFA 7.6 Developers Guide
document.