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Building Rich Client Apps @derrickko

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Hi! @derrickko

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Web Trends

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User experience.

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Real time.

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Multiple clients.

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Derby Meteor Firebase Ember.js Spine.js The Market

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What we use

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Rails Backbone.js XMPP Coffeescript

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Rails Backbone.js XMPP Coffeescript

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Template View Router Model View Controller Controller Model -ish Backbone Rails

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Rails Backbone.js XMPP Coffeescript

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Performant. Mature.

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HTML5 SSE Pusher XMPP Options.

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Rails Backbone.js XMPP Coffeescript

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A productive hybrid.

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Let’s start.

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A list.

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GET /lists/1 { id: 1, name: “Friends”, members: { { name: “Pavel” ... } } }

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Best practices still apply.

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Thin controllers

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RESTful routes.

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Have a presentation layer. Tip

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Don’t use to_json.

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It’s like HTML in models.

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Jbuilder RABL

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http://kicksend.com/#/lists/1/edit

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model = new KS.Models.List(id: 1) model.fetch() # GET api/lists/1 model.save() # PUT api/lists/1 model.destroy() # DELETE api/lists/1

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What’s a collection?

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lists = new KS.Collections.List() lists.fetch() # GET api/lists/ lists.create() # POST api/lists/

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Keep views atomic. Tip

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Load interfaces progressively. Tip

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GET api/lists/1 - 200 OK

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GET api/lists/1/members - 200 OK GET api/lists/possible_members - 200 OK

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Best practices Presentation layer Recap

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Subclass Backbone Atomic views Progressive rendering Recap

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Main Container

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Use a view manager. Tip

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https://gist.github.com/2991554

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Performance.

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GET api/deliveries

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100ms response time.

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Cache aggressively. Tip

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Action caching.

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https://gist.github.com/2990581

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View caching.

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Cached

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Cached

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Photo Photo Sender Sender Action cached View cached GET api/deliveries Delivery

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Photo Photo Sender Sender Delivery belongs_to :delivery, :touch => true

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Perceived performance.

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Assume success. Tip

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Be greedy. Tip

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1. GET /api/lists/2 list.fetch()

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2. GET /api/lists/ KS.lists.fetch()

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Keep data in sync. Tip

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1. GET /api/lists/2 2. GET /api/lists Local Global

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Server performance Perceived performance Recap

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Real time.

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eJabberd

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eJabberd Strophe.js Backbone

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eJabberd Strophe.js Backbone BOSH

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Pre-auth BOSH streams. Tip

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eJabberd Rails RubyBOSH auth

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Backbone eJabberd Rails RubyBOSH auth HTTP

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eJabberd Backbone Strophe.js HTTP Rails RubyBOSH auth BOSH

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github.com/skyfallsin/ruby_bosh

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Use a real time handler. Tip

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strophe.js xml2json Toolbox

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Pre-auth BOSH streams Real time handler Recap

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Moving forward.

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Slimmed down server.

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and CDNs

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require.js

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Don’t over engineer.

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Thanks! @derrickko