PubSub+ Monitor is the tool I am referring to.
So what we want is being able to plugin parts of the semp api into our regular existing monitoring instead new tools of uncertain quality. For that we need to be able to expose certain things in a controlled way so each team does not need to look into the semp api in detail. Timestamp of the oldest message is good data point. Also the broker really should be able to quickly find that message since it is the next message to expose to the client…
This just side note.
A web browser is also a client, sorry for being unclear. The admin view of the broker oes not use the regular SEMP api but an api private_monior in the path instead. There we can see properties like msgSpoolMsgCount which is not in the regular api for the similar endpoint. So the idea of using the inspecting the admin tool that shows most of what we want in an easy way falls to the side because of the lack of dogfooding.