Websockets API

I have a requirement to retrieve information from a server by using an API that listens only to websocket traffic. I know Mendix supports websockets as stated per this blog post, but I gather this support is for intern-use-only; I can't find anything in the modeller or the app store that would support a wss call to my server, rather than a https REST service. I also know other people have implemented websocket traffic. as stated in forum posts. If not out of the box, is everyone writing their own websocket suite in java or javascript manually? If so, can anybody recommand a good low-level websocket library preferrably in java (not javascript).
1 answers

I have succesfully used https://github.com/TakahikoKawasaki/nv-websocket-client