Real-Time Web Apps:

Introduction to ASP.NET SignalR

By Konstantinos Ziazios

4o Community Event ❄☃❄☃❄☃❄☃

Agenda

• Motivation
• Brief History
• How it works
• DEMO 1
• DEMO 2
• MORE DEMO

Motivation

What is Signal-R ?

How can I use it to have
real time communication

A Story

Web Evolution:

• Static html
• dynamic (html + javascript)
• async (ajax)
• next : Real Time (comet, web sockets)
  web sockets: protocol providing full-duplex communications channels over a single TCP connection

Real Time

Real Time over Web

• Real time experience is engaging for the user
• Instant data in any platform
• Real-time feedback / real-time notification

HTTP

Push Over Http

• Periodic Polling
• Long Polling (comet)
• Forever frame approach
• Server Send Events
• Web Sockets: Easy!

Real Time

Problem!!!

Solution

Signal-R

• Offers abstraction!
• Persistent connection, but volatile.
• From developer perspective is like a service on steroids
• No routing
• Open source!
• Is not a message queue!

Text

DEMO

Starting

DEMO

Step By Step

Future

Cross-Platform

Streaming?

Scale-up:

Azure Message

Redis

Message Bus

Resources

• http://www.asp.net/signalr/overview/getting-started
• Pluralsight
• Scott Hanselman blog

Future

Thank you!!!

Ziazios Konstantinos

twitter: @ziazios

email: ziazios@gmail.com

code: https://github.com/ThessalonikiNet-MeetUp/Presentations