Beyond Real Time Web

Beyond real-time web
Matjaž Lipuš, CTO @

Agenda
Comet
Comettechniques
Browsertechniques
Servers
Beyond real-time web | MatjažLipuš

The problem
Beyond real-time web | Matjaž Lipuš
http://alex.dojotoolkit.org

Comet
Evolution, not revolution

Comettechnique Polling
http://www.ape-project.org/comics/1/Chapter-I-common-let-s-push.html

Comettechnique Long Polling
Data transfer endsconnection
Clientre-connectaftereverydata transfer

Comettechnique Streaming
No re-connect
Minimum latency

Browsertechniques
XHR
polling
a lot of "empty" requests
XHR interactivestate
longpolling
Multipart XHR
streaming
no supportedcrossbrowser

Browsertechniques
Foreverframe
streaming
connectiononlycloses on errors or connection "recycling"
data is encoded in "envelopes"
subdomains
document.domain
Opera
IE: htmlfile ActiveX
Scripttag
longpolling
cross-domain

Browsertechniques
Flash/Java
Plugin
Flash: policyserver
Websockets
HTML 5
port 80

Servers
Apache, IIS won't cut it.
threads or processes
fixed resources per request
Libraries:
http://twistedmatrix.com
http://rubyeventmachine.com
http://github.com/simonw/nodecast

Servers Criteria
performance
supportedtechniques
serverlanguage
clientlibraries
license/price
JavaScriptlibrary
messagedispatching - STOMP protocol
reliable messaging
addressing - multiple apps
PubSub
security - SSL, LDAP

Server 
Pros:
streaming, polling, long polling
free, stable
nice overview of comet
Cons:
loadingindicator
http://meteorserver.org

Server 
Pros:
horizontal scaling
Web/TCP sockets
open source
documentation
js.io library
Cons:
development
community
Beyond real-time web | MatjažLipuš
http://orbited.org

Server 
Pros:
documentation
webstandards
open source
100.000 mess./s
comicbook
Cons:
Linux only
http://www.ape-project.org

Server 
Pros:
freeversion
1 MIO mess./s
Multiplesources
Automaticfailover
Java/.NET clientlibrary
Cons:
loadingindicator
only Linux
http://www.freeliberator.com

Server 
Pros:
early on the scene
lotsofclientAPIs
Cons:
loadingindicator
http://www.lightstreamer.com

Server 
Pros:
"father" ofcomet
Dojofundation
Cons:
documentation
examples
http://cometd.org

Server 
Pros:
simple API
FreeCommunityEdition
Cons:
loadingindicator
http://www.stream-hub.com

Server 
Pros:
1 MIO mess./s
Faulttolerantsystem
SSL
Java, PHP, PerlAPIs
RDBMS sources
Cons:
veryfewinfo. forcommercialproduct
http://www.migratory.ro

Comparison
One big fat table for:
CaplinLiberator
Cometd (Python)
ErlyComet
GlassFish
Jetty
Lightstreamer
Meteor
Orbited
Persevere
RMDS2Web Server

http://cometdaily.com/maturity.html

Contact
Matjaž Lipuš, CTO
e-mail: matjaz@theflowr.com
Twitter: @MatjazL

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Beyond Real Time Web

by Matjaž Lipuš on Feb 20, 2010

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Beyond Real Time Web — Presentation Transcript