Dear Qpid Proton users! I have multiple C++ applications connecting to a message broker, to the same queue. I'd like to filter messages based on a value of one field in the application-property map. Every message has a unique "application_id" field in its application-property map and would like to consume those messages from the queue which belong to a particular consumer (identified by this application_id). I know there is a filtering mechanism available, like described in the example selected_recv.cpp, however I don't know if this picks the key from the application-property map or from the property section (following that example none of my consumers received any message). Furthermore, what's the proper syntax/semantics of a filtering expression? Thank you!
Kind regards, Balint Bertalan
