Railsify your web development

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

Agenda

• About this session
• 12 Practices

http://www.ﬂickr.com/photos/puntodevista/84796578/

About this session

http://www.ﬂickr.com/photos/78986993@N00/3335393740/

About this session

• Day job:
consultant, .NET/Java

• Rails dev at night


About this session

• Ruby on Rails is
• Simple
• Productive
• Easy


About this session

• This started me asking why


About this session

• Answer: part practices, part Ruby
• Can we steal the practices?


About this session

• Disclaimer: the practices aren’t invented in
Rails, but they are in the culture


12 Practices

http://www.ﬂickr.com/photos/kapungo/1408329358/

BDD

http://www.ﬂickr.com/photos/fredcoree/301890340/

BDD

• Writing automated acceptance test suites
• Focus on users’ needs
• Drive the outer layer (UI, Web Services,
API)


BDD

• Executable speciﬁcations


BDD

• .NET: Specﬂow/Cucumber
• Java: JBehave/Cucumber
• Application- and tech-speciﬁc driver


TDD

http://www.ﬂickr.com/photos/mroach/2448878900/

TDD

• We all know this, right?
• However ... how to do it well?


TDD

• “Build Quality In” (Deming)
• Hands-on process that helps designing the
software


TDD

• TDD is an acquired skill
• One or two in the team spearheads the
TDD drive


MVC

http://www.ﬂickr.com/photos/spaceamoeba/3044883638/

MVC

• Splitting logic into (Domain) Model,View,
Controller


MVC

• Splitting of different types of logic
• Known structure in your web app


MVC

• Disentangle
• Refactor
• Un-spaghettize


Collaborative database
development

http://www.ﬂickr.com/photos/tomsaint/3051540613/

development

• Easy setup of a private database
• Your structural change is yours only until
committed


development

• Simple database refactorings
• “I can’t work since the change made by
John put the DB in a strange state”


development
• Migrations
• .NET: Migrator.NET
• Java: Flyway, DBDeploy, mybatis
(comparison at https://code.google.com/
p/ﬂyway/)


App-private database

http://www.ﬂickr.com/photos/evert-jan/72568626/


• Previously: devs in one team share one DB
• Here: different products share one DB
• Integration #fail



• One more degree of freedom



• Long-term architectural work...


RESTful URL:s

http://www.ﬂickr.com/photos/jimg944/3202247839

RESTful URL:s

• Readable and understandable HTTP-based
interface
• GET http://app.com/users/thomas/view
• PUT http://app.com/users/thomas/
edit.json


RESTful URL:s

• No cognitive mismatch of App vs. URL
• Uniform, standard interface
• Stateless
• Cacheable


RESTful URL:s

• Thoughtful URL design


Devops

http://www.ﬂickr.com/photos/jimg944/3123212129/

Devops

• Dev team = Ops team
• T-shaped people


Devops

• Removal of Ops-Devs wall


Devops

• Organizational change


Convention over
conﬁguration

http://www.ﬂickr.com/photos/aforero/339031109/

Convention over
conﬁguration

• Minimizing the conﬁguration
• Feature level/code level


Convention over
conﬁguration

• Easier to set up and use the app


Convention over
conﬁguration

• Remove default conﬁguration
• Take decisions!


DRY

http://www.ﬂickr.com/photos/paulmannix/286817119/

DRY

• Don’t Repeat Yourself
• Remember: not only for source code!


DRY - SASS
.content-navigation {
border-color: #3bbfce;
color: #2b9eab;
}

.border {
padding: 8px;
margin: 8px;
border-color: #3bbfce;
}


DRY - SASS
$blue: #3bbfce
$margin: 16px

.content-navigation
border-color: $blue
color: darken($blue, 9%)

.border
padding: $margin / 2
margin: $margin / 2
border-color: $blue


DRY

• Cleaner code


DRY

• Smart selection of tools


Scaling out

http://www.ﬂickr.com/photos/geraldford/3078861139/

Scaling out

• Don’t buy bigger servers, buy more!


Scaling out

• Cheaper scaling


Scaling out

• Shared-nothing
• No Session


OSS

http://www.ﬂickr.com/photos/wordridden/3107810417/

OSS

• Get along with the OSS culture
• Use & publish!


OSS

• Publishing: developer good-will
• Using: ready-made functionality


OSS

• Use 3rd party plugins in infrastructure
• Harvest infrastructure
• .NET devs: don’t focus on MS tools only


Reference management

http://www.ﬂickr.com/photos/saragoldsmith/2896007790/


• Structured dependency management



• Simple and easy dependency mgmt
• Finding
• Updating
• Control of transitive deps



• Java: Maven/Ivy
• .NET: NuGet/OpenWrap


What not to use?

• ActiveRecord pattern
• Scaffolds

http://www.ﬂickr.com/photos/deapeajay/2143573706/

Thanks!

• Thomas Lundström, Softhouse
• thomas.lundstrom@softhouse.se
• @thomaslundstrom
• http://blog.thomaslundstrom.com

http://www.ﬂickr.com/photos/mtl_shag/320960018/

Railsify your web development

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