example.notes

------=== SignalR with ASP.NET and Javacript ===------

Core Concepts:
- SignalR: allows real-time web functionality
	- simple API for creating remote procedure calls (RPC)
- Resiliance: multiple fallback channels
	1. web sockets // ideal
	2. long polling
	3. server sent events
	4. forever frames

---------------------------------------
 	Example: simple chat room
---------------------------------------
Example code from http://www.asp.net/signalr

ASP.NET:
- create a <Hub> to handle connections and broadcast messages
- hub gets message --> broadcasts to all subscribers
[c#]
	namespace SignalRChat
	{
	    public class ChatHub : Hub
	    {
	        public void Send(string name, string message)
	        {
	            // Call the broadcastMessage method to update clients.
	            Clients.All.broadcastMessage(name, message);
	        }
	    }
	}
[end]

Javascript:
- define methods to handle/broadcast events
!! Don't forget to declare the proxy!
[js]
	$(function () {
	    var chat = $.connection.chatHub;
	    chat.client.broadcastMessage = function (name, message) {
	        handleMessage(name, message);
	    };
	    $.connection.hub.start().done(function () {
	        $('#sendmessage').click(function () {
	            // Call the Send method on the hub. 
	            chat.server.send($('#displayname').val(), $('#message').val());
	            $('#message').val('').focus();
	        });
	    });
	});
[end]