For my dashboarding application I want to monitor my Spring Boot based application with internal Spring metrics. Therefor I am using the `spring-boot-actuator` dependency which is exposing a lot of internal metrics. There are a lot of HTTP based metrics and Tomcat metrics like current sessions, amount of HTTP calls of status X and so on. I coulnd't find any information regarding my Websocket connections. 

Is there any build-in out of the box metrics exposing tool for the current Websockets with Spring or do I have to create my own metrics (e.g. for showing the data in Grafana with Prometheus) and have to manually register for example a counter which is updated when I receive a `SessionConnectEvent` or `SessionConnectEvent`?

Thanks in advance!