Best java server implementation for socket.io

Question

I wanted to use socket.io to push data from server to browser but the project is java tomcat one, and there are many implementation in Github for the server impleme

Answer 1

You can try this one: https://github.com/codeminders/socket.io-server-java

This implementation is loosely based on old Socket.IO-Java library mentioned in other answers.

It supports Socket.IO 1.0+ clients. The websocket transport is implemented with Jetty 9 but there is no dependency on Jetty for core part of the library. It should not be very difficult to implement websocket transport with Tomcat if needed.

I tried to keep the API similar to Node.JS Socket.IO server API. So, to send a message to specific socket all you need is to call socket.emit()

Here is a small code fragment to be called in your SocketIO servlet:

on(new ConnectionListener() {
        public void onConnect(Socket socket)
        {
            try
            {
                socket.emit("welcome", "Welcome to Socket.IO Chat!");
            }
            catch (SocketIOException e)
            {
                socket.disconnect(true);
            }
       }
});