Real-time web

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The document discusses the real-time web and various technologies used to enable real-time functionality on the web, including REST, websockets, streaming, webhooks, PubSubHubbub, and XMPP. Real-time updates are more efficient than periodic polling of data. Emerging standards like websockets allow for real-time data streams between clients and servers. Publish-subscribe protocols allow subscribers to receive real-time updates from publishers when data changes.

Tecnología

Realtime web
Cadec 2011

Niklas Gustavsson | niklas.gustavsson@callistaenterprise.se | @protocol7

REST won
(at least outside the 6irewall)

Out of 2724 public APIs 

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

3 Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Clientserver 
Short lived requests

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

The Justin Bieber use case

5 Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Polling (sometimes) sucks

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Or, it really sucks

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Enter real time web 

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

What about messaging, WSNoti6ication 
and all that great stuff?

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Streaming
(Comet, TwiLer, websockets)

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

!"#$%&'()*+$,##-%./.

,##-$%./.$011$23
45')6'5$7$528!$9:);)(<<.<5$=
45')6'5$7$59:);)($(>?@&5$=
///
45')6'5$7$5AB+$*$;)C:);)(5$=

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Websockets

12 Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

hLp://www.adambarth.com/experimental/websocket.pdf
Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Webhooks
The Hollywood principle

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

!"#$%&'()*+,-.*%/$$!&010
2%3'()*+,-.3%4%35)6.,.7%-8%9,8)1113:
3;699<6;=3%4%3>++?4&&@>,+)A,;)>'1;-A&6.*@)B*3%C

!"#$%&6.*@)B*%/$$!&010
2%36.*@)B3%4%DE%C

15 Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

PubSubHubbub

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Subscriber

Publisher Subscriber

Subscriber

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Subscriber

Publisher Hub Subscriber

Subscriber

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Subscriber

Publisher Hub Hub Subscriber

Subscriber

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Hub <link>

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

XMPP
(aka Jabber)

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Client

Server Server Client

Client
Server

Client

24 Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

http://superfeedr.com/documentation

25 Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Case: distribuUng content
Sökmotor

2

Alfresco

EPiServer

1 2

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Sökmotor

3

Alfresco

PuSH EPiServer
2
3
1

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Publisher Subscriber
PubSub
engine
Publisher Subscriber

Publisher Subscriber

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

PuSH
publisher PubSub
engine
Twitter PuSH
Stream API subscriber
publisher
Websocket
subscriber

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Open source
http://code.google.com/p/oppna‐program‐pubsub‐service

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Demo

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

The players

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

#cadec

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

http://dev.twitter.com/pages/streaming_api

http://wiki.webhooks.org/

More?

hLp://xmpp.org/
hLp://s4.io/

hLp://code.google.com/p/pubsubhubbub/

Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

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Real-time web

1. Realtime web Cadec 2011 Niklas Gustavsson | niklas.gustavsson@callistaenterprise.se | @protocol7

2. REST won (at least outside the 6irewall) Out of 2724 public APIs  Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

9. What about messaging, WSNoti6ication  and all that great stuff? Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

11. !"#$%&'()*+$,##-%./. ,##-$%./.$011$23 45')6'5$7$528!$9:);)(<<.<5$= 45')6'5$7$59:);)($(>?@&5$= /// 45')6'5$7$5AB+$*$;)C:);)(5$= Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

13. hLp://www.adambarth.com/experimental/websocket.pdf Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

15. !"#$%&'()*+,-.*%/$$!&010 2%3'()*+,-.3%4%35)6.,.7%-8%9,8)1113: 3;699<6;=3%4%3>++?4&&@>,+)A,;)>'1;-A&6.*@)B*3%C !"#$%&6.*@)B*%/$$!&010 2%36.*@)B3%4%DE%C 15 Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

21. Subscriber Publisher Hub Hub Subscriber Subscriber Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

24. Client Server Server Client Client Server Client 24 Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

26. Case: distribuUng content Sökmotor 2 Alfresco EPiServer 1 2 Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

28. Publisher Subscriber PubSub engine Publisher Subscriber Publisher Subscriber Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

29. PuSH publisher PubSub engine Twitter PuSH Stream API subscriber publisher Websocket subscriber Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

30. Open source http://code.google.com/p/oppna‐program‐pubsub‐service Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

34. http://dev.twitter.com/pages/streaming_api http://wiki.webhooks.org/ More? hLp://xmpp.org/ hLp://s4.io/ hLp://code.google.com/p/pubsubhubbub/ Real‐&me web © 2011 Callista Enterprise | www.callistaenterprise.se

Real-time web

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