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

Having the servlet open ServerSockets is a bad code smell. This is primarily because it is the container's responsibility to manage sockets (among other resources like worker threads, sessions etc).

That said, I do not think you need a servlet in the first place. Unless you want to access some of the container's services, it would be better if you use a J2SE application to manage ServerSockets.