Question

is it any simpler way then cometd as long-polling framework for java?
Because what I need – is client specifies some parameters and sends them to server.
Server process them and starts contonuously pushing messages back to client (looks
like Thread-per-Service?). Client receivs messages and displays them. Client has possibility to stop listening and actually stop server’s service to send messages. Maybe I’m too lazy,
but cometd’s examle was not that short and transparent as I wanted it to be.

Not HTML5 based.

Answer 1

With SSE ( server sent events ) you can do exactly what you explained you want to do, but unfortunately it’s HTML5 technology .
If your interested you can check html5rocks for further information.