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About

HTML5 with Play/Scala, CoffeeScript and Jade

This session shows you how to use some of the hottest technologies today to build a webapp, an API and a mobile application to track fitness workouts. Using HTML5 technologies (specifically geo and local storage), I’ll show you how you can track the time, distance and music you listened to while exercising. Play with Scala is used for the backend and services, while CoffeeScript and Jade are used for the front-end templating and Ajax communication.

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  • HTML5 w/ Play Scala, CoffeeScript and Jade Matt Raible matt@raibledesigns.com @mraible Photos by Trish McGinity - http://mcginityphoto.com
  • Introductions How many of you like beer? Have you used HTML5? Have you used Play Framework? Have you used Scala? Tried CoffeeScript? Scalate or Jade? © 2011 Raible Designs 2
  • Matt Raible © 2011 Raible Designs
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  • Agenda Introductions Why am I doing this talk? What are these technologies? My Development Experience Demo Q and A Conclusion © 2011 Raible Designs 12
  • Why am I doing this talk? © 2011 Raible Designs 13
  • Why am I doing this talk? © 2011 Raible Designs 14
  • Why am I doing this talk? © 2011 Raible Designs 15
  • Why am I doing this talk? I like a Challenge to... - Learn Scala Via Play! And Jade is cool too! So is CoffeeScript! © 2011 Raible Designs 16
  • Why am I doing this talk? Honestly, it's because of James Strachan... © 2011 Raible Designs 17
  • Why am I doing this talk? Who likes beer too! © 2011 Raible Designs 18
  • Why am I doing this talk? © 2011 Raible Designs 19
  • What are these technologies? © 2011 Raible Designs 20
  • HTML5 http://on.wsj.com/tEGIJL © 2011 Raible Designs 21
  • How do you write HTML5? <!DOCTYPE html> <article> <aside> <section> <header> <footer> <nav> <audio> <canvas> <video> <datalist> <details> <applet> <center> <font> <frame> <frameset> http://www.w3schools.com/html5/html5_reference.asp © 2011 Raible Designs 22
  • CSS3 Animated Transitions transform: rotateY(180deg); Rounded Corners border-radius: 8px 8px 0 0; Drop Shadows box-shadow: 2px 2px 4px 4px; Gradient Colors Styling based on sibling count More cursors for better usability Custom Checkboxes and Radio Buttons http://lea.verou.me/css3-secrets © 2011 Raible Designs 23
  • Play Framework A full-stack Java Web Framework made by Web Developers Compile on-the-fly Stateless Architecture Breaks web framework norms - Uses static methods Doesn't use Servlet API © 2011 Raible Designs 24
  • Matrix Results 18 17.5 17 17 17 13.5 9 15.5 15 15 14.5 14 14 13.513.5 11.5 4.5 0 2 din ry g s ails Ra ils ck et Pla ipe Fle Sp rin GW est Va a Gr uts Tap Str Str Wi JS Lift x T F y © 2011 Raible Designs 25
  • Weighted Results Grails (90) Spring MVC (85) Ruby on Rails (82.5) Vaadin (82.5) Play (82.5) GWT (80) © 2011 Raible Designs 26
  • Mailing List Traffic Wicket GWT Grails Rails Tapestry Play 0 475 950 1841 1753 1635 1604 1538 1451 1425 1900 July 2011 * Spring MVC and Vaadin use Forums, which don't provide this data. © 2011 Raible Designs 27
  • Play Scala But really, it's more like this © 2011 Raible Designs 28
  • Play Scala © 2011 Raible Designs 29
  • Scala "Scala is like the dragon in Avatar. It will try to kill you, but if you master it, you can fly great distances with it and have a wonderful time." -- Venkat Subramaniam © 2011 Raible Designs 30
  • Scala Basics def starts a method variables are started with var or val variables are defined with name:type semicolons are not required © 2011 Raible Designs 31
  • Scala vs. Java © 2011 Raible Designs 32
  • Play with Scala © 2011 Raible Designs 33
  • © 2011 Raible Designs
  • Learning Scala Venkat's Scala for the Intrigued PragPub Magazine, starting in Sep 2011 Scala for the Impatient - Cay Horstmann Programming in Scala, 2nd Edition - Martin Odersky, Lex Spoon, and Bill Venners Twitter's Scala School © 2011 Raible Designs 34
  • CoffeeScript © 2011 Raible Designs 35
  • JavaScript: The Good Parts © 2011 Raible Designs 36
  • Jade © 2011 Raible Designs 37
  • Jade Example © 2011 Raible Designs 38
  • CoffeeBar © 2011 Raible Designs 39
  • My Development Experience © 2011 Raible Designs 40
  • Getting Started © 2011 Raible Designs 41
  • Developing with Play Scala © 2011 Raible Designs 42
  • Tools I started with... © 2011 Raible Designs 43
  • Scalate Module © 2011 Raible Designs 44
  • Scalate Integration Solution © 2011 Raible Designs 45
  • Integrating Scalate with Play play deps --sync © 2011 Raible Designs 46
  • Integrating Scalate with Play © 2011 Raible Designs 47
  • Integrating Scalate with Play © 2011 Raible Designs 48
  • Cannot start in PROD mode with errors Template compilation error (In /app/views/Application/index.jade around line 2) The template /app/views/Application/index.jade does not compile : #{user.name} is not closed. play.exceptions.TemplateCompilationException: #{user.name} is not closed. at play.templates.TemplateCompiler.generate(TemplateCompiler.java:102) at play.templates.TemplateCompiler.compile(TemplateCompiler.java:15) at play.templates.GroovyTemplateCompiler.compile(GroovyTemplateCompiler.java:4 1) © 2011 Raible Designs
  • Integrating Scalate with Play http://raibledesigns.com/rd/entry/integrating_scalate_and_jade_with © 2011 Raible Designs 50
  • Play 2.0 © 2011 Raible Designs 51
  • Play 2.0 © 2011 Raible Designs 52
  • Play 2.0 Beta © 2011 Raible Designs 53
  • A Nice Break ... © 2011 Raible Designs 54
  • CoffeeScript with Play © 2011 Raible Designs 55
  • CoffeeScript with Play http://raibledesigns.com/rd/entry/trying_to_make_coffeescript_work © 2011 Raible Designs 56
  • My Development Experience © 2011 Raible Designs 57
  • © 2011 Raible Designs
  • H5BP and Play cd cp cp cp cp cp cp cp cp $boilerplate-download 404.html ~/dev/play-more/app/views/errors/404.html *.png ~/dev/play-more/public/. crossdomain.xml ~/dev/play-more/public/. -r css ~/dev/play-more/public/stylesheets/. favicon.ico ~/dev/play-more/public/. humans.txt ~/dev/play-more/public/. -r js/libs ~/dev/play-more/public/javascripts/. robots.txt ~/dev/play-more/public/. © 2011 Raible Designs 59
  • Scalate Layouts © 2011 Raible Designs 60
  • HTML5 Boilerplate http://raibledesigns.com/rd/entry/integrating_html5_boilerplate_with_scalate © 2011 Raible Designs 61
  • HTML5 Development © 2011 Raible Designs 62
  • StopWatch with Coffee © 2011 Raible Designs 63
  • Jade Template for Watch © 2011 Raible Designs 64
  • HTML5 Development © 2011 Raible Designs 65
  • HTML5 Geo API © 2011 Raible Designs 66
  • Google Maps JS API © 2011 Raible Designs 67
  • Jade View for Map © 2011 Raible Designs 68
  • HTML5 Development © 2011 Raible Designs 69
  • Odometer © 2011 Raible Designs 70
  • Testing Tried Trip Meter on a bike ride Said I'd traveled 5 km, when I knew I'd gone 10 Was calculating start to end w/o waypoints To Visualize: integrated odometer with maps using Google Maps Polylines © 2011 Raible Designs 71
  • Discovered HTML5 Geolocation was highly inaccurate - Fixed by passing {enableHighAccuracy: true} to navigator.geolocation.watchPosition() © 2011 Raible Designs 72
  • Discovered © 2011 Raible Designs 73
  • Show Stopper? Geolocation doesn't run in the background © 2011 Raible Designs 74
  • Making it look good © 2011 Raible Designs 75
  • Twitter's Bootstrap © 2011 Raible Designs 76
  • Bootstrap © 2011 Raible Designs 77
  • LESS © 2011 Raible Designs 78
  • LESS © 2011 Raible Designs 79
  • CSS3 Media Queries © 2011 Raible Designs 80
  • HTML5 Features Geolocation CSS 3 Audio History Local Storage Canvas © 2011 Raible Designs 81
  • HTML5 and Bootstrap http://raibledesigns.com/rd/entry/developing_with_html5_coffeescript_and © 2011 Raible Designs 82
  • Anorm and PostgreSQL I'm a big fan of ORMs like Hibernate and JPA Learn a new JDBC abstraction? Really!? Anorm is and will be the default for Play Scala Chose PostgreSQL since that's what Heroku uses © 2011 Raible Designs 83
  • Data Model © 2011 Raible Designs 84
  • ScalaTest © 2011 Raible Designs 85
  • Anorm in Action © 2011 Raible Designs 86
  • Controller and View © 2011 Raible Designs 87
  • Anorm, Dates & PostgreSQL © 2011 Raible Designs 88
  • Anorm, Dates & PostgreSQL Discovered "support of Date for insertion" was added to Anorm in August 2011 Cloned play-scala, built locally and uploaded Modified dependencies.yml to use new version © 2011 Raible Designs 89
  • Anorm and PostgreSQL http://raibledesigns.com/rd/entry/play_scala_s_anorm_heroku © 2011 Raible Designs 90
  • More Scalate Goodness © 2011 Raible Designs 91
  • More Scalate Goodness © 2011 Raible Designs 92
  • Scalate as a Play Module http://raibledesigns.com/rd/entry/more_scalate_goodness_for_play © 2011 Raible Designs 94
  • App was still unusable I still hadn't solved the fundamental problem The app couldn't run in the background on a mobile phone © 2011 Raible Designs 95
  • PhoneGap to the Rescue! © 2011 Raible Designs 96
  • Requirements Intel-based computer with Mac OS X Snow Leopard (10.6) Xcode PhoneGap Necessary for Installation: - An Apple iOS Device iOS Developer Certification 97 © 2011 Raible Designs
  • Icons and Splash Screen © 2011 Raible Designs 98
  • Background Modes © 2011 Raible Designs 99
  • Success! © 2011 Raible Designs 100
  • PhoneGap Writeup http://raibledesigns.com/rd/entry/phonegap_to_the_rescue 101 © 2011 Raible Designs
  • Was it worth it? Development Hours: $$$ play-more.com domain: $180 GoPro Helmet Cam: $239 iOS Certified Developer: $100 Free Trip to Devoxx: Priceless © 2011 Raible Designs 102
  • Developing Play More http://www.youtube.com/watch?v=bBqtPPfM2xQ © 2011 Raible Designs 103
  • Developing Play More http://www.youtube.com/watch?v=bBqtPPfM2xQ © 2011 Raible Designs 103
  • Tools © 2011 Raible Designs 104
  • HTML5 vs. Native If you need background services like geolocation or audio, native is necessary Can still write your apps in HTML5 Bridge the Gap with PhoneGap or Titanium If mobile is important, consider fully native with WebViews for common features - a.k.a. Hybrid © 2011 Raible Designs 105
  • Questions? Contact - http://raibledesigns.com http://twitter.com/mraible Download - http://slideshare.net/mraible © 2011 Raible Designs 106

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