Java backend for Socket.IO library (http://socket.io/)

Supports Socket.IO clients version 1.0+ Requires JSR 356-compatible server (tested with Jetty 9 and Tomcat 8)

Right now only websocket and XHR polling transports are implemented.

Based on https://github.com/tadglines/Socket.IO-Java

License: MIT

Websocket endpoint initialization in Jetty

Default websocket endpoint configuration assumes it's located in the root context and accessible via /socket.io/ path.

When Socket.IO backend is integrated into webapp managed by Jetty there is no need to perform additional configuration because Jetty scans for @ServerEndpoint annotation and initializes websocket endpoint automatically.

When Jetty server is embedded into your application, websocket endpoint is located in the root context ("/") and expected to be accessible via /socket.io/ path (default configuration), then in order to initialize endpoint you should add the following code

        WebSocketServerContainerInitializer.
                configureContext(context).
                addEndpoint(WebsocketTransportConnection.class);

When Jetty server is embedded into your application, but websocket endpoint is either located not in the root context ("/") or expected to be accessible via path other than /socket.io/, then in order to initialize endpoint you should add the following code

        ServerContainer serverContainer = WebSocketServerContainerInitializer.
                configureContext(context);
        serverContainer.
                addEndpoint(new AnnotatedServerEndpointConfig(serverContainer,
                        WebsocketTransportConnection.class,
                        WebsocketTransportConnection.class.getAnnotation(ServerEndpoint.class),
                        null) {
                    @Override
                    public String getPath() {
                        return "/"; // context-relative path, "/bar" for context "/foo" and path "/foo/bar"
                    }
                });

See example in com.codeminders.socketio.sample.jetty.ChatServer