java ee - How can I get real system file path from within a WebSocket Endpoint -

while within servlet context can real system file path calling on request.getservletcontext().getrealpath(upload_path). please friends how can equivalent within websocket endpoint in java ee 7. in advance.

you can path information serverendpointconfig#getpath(). difference between results of method , servletcontext#getrealpath() gives relateive path; prefix results of method root context name. results, need implement onopen (from javax.websocket.endpoint class)

//called when client first negotiates opening of websocket connection public void onopen(session session, serverendpointconfig config){     string path = config.getpath();  }