servlet for implementing socket connection

Question

How do I implement a web application with a Servlet that is listening on a port for socket connections?

Answer 1

I assume you don't mean the front-door HTTP connection, which you get for free with the servlet container... But if you want to add, say, an admin service you could create a listener thread that sets some global state in the servlet. Note that this is not considered kosher (and I believe may even violate the servlet standard).