SignalR - Building an async web app with .NET
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The document discusses building asynchronous web applications with SignalR in .NET, outlining the need for asynchronous communication for rich client experiences and real-time interactions. SignalR is presented as an abstraction over persistent connections, similar to socket.io for Node.js, with a brief tutorial on its implementation. The document also includes resources for further learning and a demo showcasing various features of SignalR.
![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");
});
});](https://image.slidesharecdn.com/presentation-130130003650-phpapp02/85/SignalR-Building-an-async-web-app-with-NET-8-320.jpg)
SignalR - Building an async web app with .NET
- 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?
Editor's Notes
- #3: Hej, jag heter Tomas
- #5: I en synkron miljø så tar hvert enkelt request en thread mange request lavere ytelse
- #6: Nå er vi ikke avhengig av noen polling tid hvis vi har en «true» persistent connection.Modellen er asyn, så hver connection trenger ikke en egen thread.
- #8: Vi trenger abstraktionen då web socket ikke er 100% støttet og å programmere mot socket er vanskeligDet er en abstraktion over en persistent connectionWebSockets --> server sent events --> forever frame --> long pollingWebSockets persistent tcp connectionServer sent events /eventsource one way messaging / client listens to eventsForever frame – En iframe etter sidlasting med en laaang connectionLong polling poll and wait for dataSkallerer bra, lagrer ikke noe state på serveren. Har støtte for scale out gjenom redis og azure service bus som default.
- #13: ASP.NET Web API finns demos og forklaringerDemo project kommer med magisk branching graf