SirnalR talk at Sela open house

1. © Copyright SELA software & Education Labs Ltd. 14-18 Baruch Hirsch St.Bnei Brak 51202 Israel
www.sela.co.il

2. What is “Real Time”
experience
“Real Time” web techniques
What is signalR
SignalR protocol
Connection & Hub
Groups and private
messages
.Net client
Self Hosting
Scaleout

3. Polling
ForeverFrames
Long-Polling
ServerSentEvents
WebSocket

8. Web Socket Request
TCP Socket
ServerClient

10. • Not all servers support web sockets
• Not all network components support web sockets
• Its API is limited

11. • Code once, deploy everywhere
• As cross-platform as possible
• Simple API to work with

12. • Open source project
• Abstraction layer over connection technique
• Can be self-hosted
• Call client methods from the server
Polling
ForeverFrames
Long-Polling
ServerSentEvents
WebSocket
=

13. WebSocket
• Good performance
• Strict prerequisites
• Limited API
SignalR
• Abstraction layer
• Rich API
• Supports WebSocket

15. Negotiate request
Negotiate response
Connection phase
Client
Server

17. • WebSocket-like API
• Lower level code
• Provides us with more control

19. • Abstraction over signalR connection
• Service-like API
• Call clients methods from the server

21. • You can use connection ID
• You can access a particular client by it
Clients.Client(connectionId).sendMessage(message)

22. • Part of Hub API
• Stored on client
• Not persistent

24. _connection = new
HubConnection("http://localhost/RanWahle.Blog.SignalR.Demo");
IHubProxy proxy = connection.CreateHubProxy("soccerResultsHub");
_connection.Start().ContinueWith(
//define proxies
);
//invoke server methods
_proxy.Invoke(“HubServerMethod“ , args…));

26. • Three NuGet packages to install
• Create class with Configuration method.
• Map hub in the Configuration method
• Use the class as a type parameter to
WebApplication.Start

28. • signalR supports ASP.NET authentication &
authorization
• AuthorizeAttribute
• Accessing user data from context
• Authenticated request may downdgrade
to serverSentEvents in some clients.

30. • Install Microsoft.AspNet.SignalR.SqlServer nuget
• Add One line of code
• Your app is ready to scaleout

32. Real time experience is more than
just polling
Using signalR can use the best
available technique
It can be self hosted
It can scale out
It has several clients

34. • http://www.asp.net/signalr
• http://signalr.net/
• Twitters:@signalr @DamianEdwards @davidfowl and
@DavianFowlwards
• http://blogs.Microsoft.co.il/blogs/ranw

36. © Copyright SELA software & Education Labs Ltd. 14-18 Baruch Hirsch St.Bnei Brak 51202 Israel
www.sela.co.il