[undertow-dev] Websocket proxy: monitor (in)activity

Hi, Our application uses Undertow to serve a Spring-boot application, as well as proxy websocket connections to a backend server. Now we would like to monitor activity on the websocket, so that specific resources can be freed when the websocket has been inactive for a long time. Is there an appropriate way we can detect this in Undertow? Maybe some timeout setting that can be used for this purpose? -Frederick