The presentation is a really short introduction. To get the most of it you should go to: https://github.com/mastoj/SignalRPres where I have some really small sample projects. If you have installed redis, follow the instructions here https://github.com/MSOpenTech/Redis, and uses IIS express you can try running scale out with the MyFarm.ps1 script in this folder: https://github.com/mastoj/SignalRPres/tree/master/Chatty/Chatty.

1. SIGNALR
Building an async web app with .NET
Oslo/NNUG
Tomas Jansson
29/01/13

2. Tomas Jansson
Manager/Faggruppeleder .NET
BEKK Oslo
@TomasJansson
http://blog.tomasjansson.com

3. AGENDA
What is async web?
Why async web?
What is SignalR?
How?
Demo
Summary
Resources

4. WHAT IS ASYNC WEB?
When clients do not have
persistent connections Client1
1.
Server
2. 2.
3. 3.
Client3 Client2

5. WHAT IS ASYNC WEB?
When clients have persistent
connections against the server Client1
1.
Server
2. 2.
Client3 Client2

6. WHY ASYNC WEB?
Richer clients
Diagnostic
Chat
Collaboration
Real-time analysis
Notifications
”Anything real-time”
”Anything collaborative”

7. WHAT IS SIGNALR?
Abstraction over persistent connections
Asynchronous scalable web applications
It’s like Socket.IO and nowjs (nodejs) for .NET

8. HOW?
1. Install-package Microsoft.AspNet.SignalR -pre (-pre when pre-release)
2. Server
[HubName("simple")]
public class SimpleHub : Hub
{
public void CallOut(string message)
{
Clients.Others(message);
}
}
3. Client
$(function() {
var simpleHub = $.connection.simple;
$.extend(simpleHub.client, {
echo: function(message) { alert(message); }
});
$("#some-button").click(function() {
simpleHub.server.callOut("Echo");
});
});

9. DEMO TIME!
1. Persistent connection
2. Chat
3. Chat with Redis
4. (Windows app client) – if there is time

10. SCALE OUT
pub/sub
Server 1 Server 2
Client 1 Client 2 Client 3 Client 4 Client 5 Client 6

11. SUMMARY
• Async web is coming for you
• Collaboration, real-time and notification systems
• SignalR is a simple to use persistent connection abstraction for .NET

12. RESOURCE
• Demo projects: https://github.com/mastoj/SignalRPres
• SignalR project page: http://www.signalr.net
• SignalR on github: https://github.com/SignalR/SignalR (good samples)
• Redis for windows: http://tinyurl.com/winredis (Microsoft Open Tech)

13. Questions?