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Railsify your web development
1. Railsify your web
development
Thomas Lundström, Softhouse
@thomaslundstrom
Scandinavian Developer Conference, Gothenburg
April 4, 2011
http://www.flickr.com/photos/mtl_shag/320960018/
måndag den 4 april 2011
2. Agenda
• About this session
• 12 Practices
http://www.flickr.com/photos/puntodevista/84796578/
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3. About this session
http://www.flickr.com/photos/78986993@N00/3335393740/
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4. About this session
• Day job:
consultant, .NET/Java
• Rails dev at night
http://www.flickr.com/photos/78986993@N00/3335393740/
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5. About this session
• Ruby on Rails is
• Simple
• Productive
• Easy
http://www.flickr.com/photos/78986993@N00/3335393740/
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6. About this session
• This started me asking why
http://www.flickr.com/photos/78986993@N00/3335393740/
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7. About this session
• Answer: part practices, part Ruby
• Can we steal the practices?
http://www.flickr.com/photos/78986993@N00/3335393740/
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8. About this session
• Disclaimer: the practices aren’t invented in
Rails, but they are in the culture
http://www.flickr.com/photos/78986993@N00/3335393740/
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9. 12 Practices
http://www.flickr.com/photos/kapungo/1408329358/
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10. BDD
http://www.flickr.com/photos/fredcoree/301890340/
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11. BDD
• Writing automated acceptance test suites
• Focus on users’ needs
• Drive the outer layer (UI, Web Services,
API)
http://www.flickr.com/photos/fredcoree/301890340/
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12. BDD
• Executable specifications
http://www.flickr.com/photos/fredcoree/301890340/
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13. BDD
• .NET: Specflow/Cucumber
• Java: JBehave/Cucumber
• Application- and tech-specific driver
http://www.flickr.com/photos/fredcoree/301890340/
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14. TDD
http://www.flickr.com/photos/mroach/2448878900/
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15. TDD
• We all know this, right?
• However ... how to do it well?
http://www.flickr.com/photos/mroach/2448878900/
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16. TDD
• “Build Quality In” (Deming)
• Hands-on process that helps designing the
software
http://www.flickr.com/photos/mroach/2448878900/
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17. TDD
• TDD is an acquired skill
• One or two in the team spearheads the
TDD drive
http://www.flickr.com/photos/mroach/2448878900/
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18. MVC
http://www.flickr.com/photos/spaceamoeba/3044883638/
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19. MVC
• Splitting logic into (Domain) Model,View,
Controller
http://www.flickr.com/photos/spaceamoeba/3044883638/
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20. MVC
• Splitting of different types of logic
• Known structure in your web app
http://www.flickr.com/photos/spaceamoeba/3044883638/
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21. MVC
• Disentangle
• Refactor
• Un-spaghettize
http://www.flickr.com/photos/spaceamoeba/3044883638/
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22. Collaborative database
development
http://www.flickr.com/photos/tomsaint/3051540613/
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23. Collaborative database
development
• Easy setup of a private database
• Your structural change is yours only until
committed
http://www.flickr.com/photos/tomsaint/3051540613/
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24. Collaborative database
development
• Simple database refactorings
• “I can’t work since the change made by
John put the DB in a strange state”
http://www.flickr.com/photos/tomsaint/3051540613/
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25. Collaborative database
development
• Migrations
• .NET: Migrator.NET
• Java: Flyway, DBDeploy, mybatis
(comparison at https://code.google.com/
p/flyway/)
http://www.flickr.com/photos/tomsaint/3051540613/
måndag den 4 april 2011
26. App-private database
http://www.flickr.com/photos/evert-jan/72568626/
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27. App-private database
• Previously: devs in one team share one DB
• Here: different products share one DB
• Integration #fail
http://www.flickr.com/photos/evert-jan/72568626/
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28. App-private database
• One more degree of freedom
http://www.flickr.com/photos/evert-jan/72568626/
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29. App-private database
• Long-term architectural work...
http://www.flickr.com/photos/evert-jan/72568626/
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30. RESTful URL:s
http://www.flickr.com/photos/jimg944/3202247839
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31. RESTful URL:s
• Readable and understandable HTTP-based
interface
• GET http://app.com/users/thomas/view
• PUT http://app.com/users/thomas/
edit.json
http://www.flickr.com/photos/jimg944/3202247839
måndag den 4 april 2011
32. RESTful URL:s
• No cognitive mismatch of App vs. URL
• Uniform, standard interface
• Stateless
• Cacheable
http://www.flickr.com/photos/jimg944/3202247839
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33. RESTful URL:s
• Thoughtful URL design
http://www.flickr.com/photos/jimg944/3202247839
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34. Devops
http://www.flickr.com/photos/jimg944/3123212129/
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35. Devops
• Dev team = Ops team
• T-shaped people
http://www.flickr.com/photos/jimg944/3123212129/
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36. Devops
• Removal of Ops-Devs wall
http://www.flickr.com/photos/jimg944/3123212129/
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37. Devops
• Organizational change
http://www.flickr.com/photos/jimg944/3123212129/
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38. Convention over
configuration
http://www.flickr.com/photos/aforero/339031109/
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39. Convention over
configuration
• Minimizing the configuration
• Feature level/code level
http://www.flickr.com/photos/aforero/339031109/
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40. Convention over
configuration
• Easier to set up and use the app
http://www.flickr.com/photos/aforero/339031109/
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41. Convention over
configuration
• Remove default configuration
• Take decisions!
http://www.flickr.com/photos/aforero/339031109/
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42. DRY
http://www.flickr.com/photos/paulmannix/286817119/
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43. DRY
• Don’t Repeat Yourself
• Remember: not only for source code!
http://www.flickr.com/photos/paulmannix/286817119/
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46. DRY
• Cleaner code
http://www.flickr.com/photos/paulmannix/286817119/
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47. DRY
• Smart selection of tools
http://www.flickr.com/photos/paulmannix/286817119/
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48. Scaling out
http://www.flickr.com/photos/geraldford/3078861139/
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49. Scaling out
• Don’t buy bigger servers, buy more!
http://www.flickr.com/photos/geraldford/3078861139/
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50. Scaling out
• Cheaper scaling
http://www.flickr.com/photos/geraldford/3078861139/
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51. Scaling out
• Shared-nothing
• No Session
http://www.flickr.com/photos/geraldford/3078861139/
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52. OSS
http://www.flickr.com/photos/wordridden/3107810417/
måndag den 4 april 2011
53. OSS
• Get along with the OSS culture
• Use & publish!
http://www.flickr.com/photos/wordridden/3107810417/
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54. OSS
• Publishing: developer good-will
• Using: ready-made functionality
http://www.flickr.com/photos/wordridden/3107810417/
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55. OSS
• Use 3rd party plugins in infrastructure
• Harvest infrastructure
• .NET devs: don’t focus on MS tools only
http://www.flickr.com/photos/wordridden/3107810417/
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56. Reference management
http://www.flickr.com/photos/saragoldsmith/2896007790/
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57. Reference management
• Structured dependency management
http://www.flickr.com/photos/saragoldsmith/2896007790/
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58. Reference management
• Simple and easy dependency mgmt
• Finding
• Updating
• Control of transitive deps
http://www.flickr.com/photos/saragoldsmith/2896007790/
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59. Reference management
• Java: Maven/Ivy
• .NET: NuGet/OpenWrap
http://www.flickr.com/photos/saragoldsmith/2896007790/
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60. What not to use?
• ActiveRecord pattern
• Scaffolds
http://www.flickr.com/photos/deapeajay/2143573706/
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61. Thanks!
• Thomas Lundström, Softhouse
• thomas.lundstrom@softhouse.se
• @thomaslundstrom
• http://blog.thomaslundstrom.com
http://www.flickr.com/photos/mtl_shag/320960018/
måndag den 4 april 2011
