Web Workers Camp Paris 3 {Events}

WebWorkersCampParis3 15th and 16th of April 2011 at La Cantine

#WebWorkerCampParis3 on Twitter, identi.ca, Live Cast, TwitterStreamGraphs, Collecta, flickr

Attended activities

• Keynote : SQL-noSQL by Erik Meijer
• Grid
  1. Turblences / Web Semantic
  2. Goliath / myJS
  3. LINQ / SPDDY
  4. UC Engine / cloud DeathMatch / Backbone SammyJS

SQL-noSQL by Erik Meijer

• objective
  • noSQL is the dual of SQL
• Wikipedia:Category theory
• objects vs tables
  • quoting Donald Knuth
  • normal imperative program does create a key-value store equivalent
    • from pointer address to value
  • discussing Codd and "normalization"
    • cost on the programmer (but safe job for DBAs)
  • multiple tables as a "foreign-key primary-key store"
  • Wikipedia:Principle of compositionality by Frege
    • and the power of recursion
      • with this recursion as the default
  • impedance mismatch, programming language vs. data language
    • cf Wikipedia:Object-relational impedance mismatch
  • mention of LINQ (didn't see the talk during the previous WebWorkersCampParis)
    • LINQ as Monads, LINQ Queries as sugar syntax
  • work to pretend that tables are objects
  • mention of the www also as a key-value store
    • see also SemanticWeb
• overall criticizing the whole process and its very numerous steps
• ad-hocs query don't scale
  • even with index
  • select from www...
• how to solve it?
  • Wikipedia:Math Rescue
  • "arrows (between tables) are Wikipedia:Morphism for objects"
  • if dual then call it coSQL
• advantages
  • open thus scalable
• tradeoffs
  • explicit on doing the queries
    • optimizer can't reason about the code
  • eventually consistent, have to propagate coherence
• early web links were pointing the other way around
  • then transitioned to the open world paradigm
  • mention of Tim Berner's Lee early search for funding
• existing solutions
  • purest noSQL
    • Amazon SimpleDB
      • see AWS
  • HTML5 datastore
• on the query language
  • doubts on CouchDB/MongoDB with "query by example"
  • but rather Raven with emphasis on links
• see also
  • classes at IUT and UTC
  • Erik Meijer's Microsoft Research Homepage
  • WebWorkersCampParis#MongoDB
  • http://gotocon.com/dl/jaoo-brisbane-2010/slides/ErikMeijer_bKeynotebExploringNoSQL.pdf
  • http://news.ycombinator.com/item?id=2416566
  • Bird's First Homomorphism Lemma as MapReduce precusor
    • cf Ralf Lammel
  • DryadLINQ at Microsoft Research
  • Wikipedia:Dryad (programming(
    • see also Pig Latin for Hadoop
  • http://channel9.msdn.com/search?term=linq
  • http://channel9.msdn.com/forums/Coffeehouse/257597-And-now-LINQ-for-Ruby/
  • Wikipedia:Language Integrated Query (LINQ)
  • http://redis.io

Duality

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Turblences par af83

• but
  • contre le monopole
    • e.g. Facebook, LinkedIn, ...
    • limitant la vitesse d'innovation
  • contre le reseau social technique
    • qui ne correspont pas au reseau social classique
      • flexibilite de mentir ou de cacher une information
• contraintes
  • soutenable, securise, anonyme si choisi
• resultat
  • permettre la proxification
  • pouvoir gerer ses informations par applications
    • et donc mentir a ceux ou celles auquel on ne fait pas completement confiance
  • Portable Contacts pour la liste de contacts et de resources
    • quid de FOAF?
  • oAuth2
  • webfinger pour decouvrir le point d'entree
  • https://auth.af83.com
  • separation authentification identification
    • possibilite de mieux gerer les services externes e.g. SaaS
  • difference principale avec Facebook/Twitter/Google/... Connect
    • champs meta par defaut
    • permettre l'interposition de proxy
• voir aussi
  • http://turbulences.com
  • Diaspora, DiSo, ...
  • a explorer
    • http://noserub.com
    • http://autonomo.us
    • house "box" as the main new platform conquest fight?
    • support OmniAuth/OmniSocial/..?
    • Launch of the National Strategy for Trusted Identities in Cyberspace, US NIST April 2011
  • deja essaye
    • http://www.thimbl.net

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Goliath par Bruno Michel

• Goliath and friends
  • Rack http://rack.rubyforge.org Wikipedia:Rack (Web server interface)
  • EventMachine http://rubyeventmachine.com framework evenementiel Wikipedia:Reactor pattern
  • mention de WebWorkersCampParis#NodeJS avec des doutes
  • Fiber light weight cooperative concurrency in Ruby 1.9
    • faire des traitements asynchone avec du code qui "semble" synchrone
    • https://github.com/igrigorik/em-synchrony/
• plusieurs modes dev/test/prod
  • avec leur configurations
• plugins https://github.com/postrank-labs/goliath/wiki/Plugins
• a venir
  • Cloud Foundry, Websockets, SPDY?, interface a la Sinatra/Grape? (pour l'instant tres Rack)
• Q&A
  • Rails? pas pour le moment, plus pour des proxy de performance
  • debugging? plus de backtrace
  • implementations des fibres? light thread
    • http://stackoverflow.com/questions/796217/what-is-the-difference-between-a-thread-and-a-fiber
• voir aussi http://goliath.io
  • http://www.igvita.com/2011/03/08/goliath-non-blocking-ruby-19-web-server/
  • https://github.com/postrank-labs/goliath
  • Episode 0.5.5 - Goliath, Event Machine, and SPDY with Ilya Grigorik, The Changelog April 2011

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LINQ par Pierre et Claude

• etre capable de choisir le bon framework
• but
  • exprimer des requetes programmer et provider friendly
    • eviter de coder la requete
    • automatiser le requetage
  • adapte a NodeJS/OpenMQ/MapReduce/... puisque evenementiel et fonctionel
• lazy evaluation, easy composition
• Expression comme arbres
  • represente une requete
• manipulation d'enumerable avec comme source
  • BDDs
  • texte pour les examples
  • mais aussi du code
• LINQ to object, chainage de fonction
  • puis compilation
• voir aussi
  • http://ironruby.net
  • https://github.com/IronLanguages/main/blob/master/Languages/Ruby/Samples/Linq/101samples.rb

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UC Engine, af83

• protocol PubSub (dc tech. agnostic)
  • envoie evenement sur une queue
  • evenement recu par ts ceux inscrits
• difference
  • persisant
  • timecode
• code en Erlang
  • JS Client, Ruby Brick (service, e.g. traduction), ...
• gestion d'evenements
  • a la XMPP
• possibilite de rejouer des evenements
  • e.g. rattraper un retard
• utilisation du long polling
• voir aussi http://ucengine.af83.com/
  • http://af83.com/en/news/17
  • http://docs.ucengine.org/
    • http://docs.ucengine.org/#extensions dont Ruby
  • https://github.com/AF83/ucengine
  • http://www.slideshare.net/ineation/ucengine-fosdem-2011
  • http://demo.ucengine.org/demo/
  • alternative a https://podio.com

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Overall remarks and conclusions

• another aspect, like previous Saturday, on the efforts required to push for technologies
  • including languages
  • against the "build it and they will come" stereotype
• mostly af83 and friendly technologies?

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Other reviews or coverage

• Retour sur le WebWorkersCamp3 par Bruno Michel, Dev blog af83 April 2011

To do

1. link to previous WebWorkersCampParis
2. notes on programming, languages, tools, etc...
3. improve Template
4. add map data (:ola-point lat= lon= text='':) (La Cantine)
5. notes from the 15th and the few checks I did
6. topic that were not really discussed when I was there
   1. geolocalization
      1. HTML5
7. Grid presentation I missed
   1. myJS by @jie
      1. http://myjs.fr/
   2. SPDY
      1. Wikipedia:SPDY https://github.com/igrigorik/spdy
   3. Sammy.js A Small Web Framework with Class / RESTFul Evented JavaScript
   4. Backbone.js models with key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface
8. chat on interfaces
   1. still no collaborative spaces
      1. <100 Microsoft Surface in France?
   2. yet Nintendo Wii, Microsoft Kinect, Apple iPad, ...
   3. recall Seedea:Seedea/Seedea#Interactions
   4. more on Kinect
      1. http://depthjs.media.mit.edu (also added to
      2. http://openkinect.org
      3. http://kinecthacks.net
      4. http://www.freenect.com
      5. http://www.ros.org/wiki/kinect including http://www.ros.org/wiki/mit-ros-pkg used for Kinect Hand Detection aka "Minority Report", MIT CSAIL 2010
9. PerlDancer The easiest way to write web applications with Perl