Performance: Tested on VM: OS: CentOS, 4vCPU, 2GB RAM,Java 7

Client Sessions:

can support:

• 10,000 long-polling sessions on single node
• 50,000 WebSocket sessions on single node

TPS:

• 4,000 requests per second per single channel.
• 80,000 requests per second total.

SocketIo4Netty is a simple Socket.IO Java server implementation based on Netty server framework. Supports 0.7+ up to latest 0.9.16 versions of Socket.IO-client.

Supported transport protocols:

• WebSocket
• Flash Socket
• XHR-Polling
• JSONP-Polling

	SocketIOServer socketIoServer = new SocketIOServer();
	socketIoServer.setPort(5000);
	socketIoServer.setListener(new SocketIOAdapter() {
		public void onMessage(ISession session, String message) {
			System.out.println("Received message: " + message);
		}
	});
	socketIoServer.start();

For more examples, see SocketIo4j Examples.

<dependency>
	<groupId>com.github.socketIo4Netty</groupId>
	<artifactId>socketIo4Netty</artifactId>
	<version>1.0.16</version>
</dependency>