Reclaim your architecture @ sbonrails

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Reclaim your architecture Stephan Hagemann

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Rails developers?

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STEPHAN GERMAN GERMANY BOULDER ROCK CLIMBING WHITE MALE NETHERLANDS CYCLING DIVING CONSULTANT RUBY RAILS GO XING PIVOTAL LABS

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Labeling in Software development

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No Rails app starts with a namespace

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All gems start with a namespace

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Rails Gems

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AEH FACE Rails Gems

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! ! ! ! ! ! ! ! ! + active record + active support + action controller Rails Gems

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How can you tell what still belongs?

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Try this! ! Namespace everything in your next app

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Give yourself a box so you can start thinking outside of it

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Can you prove small chunks?

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Growing size

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Exploding complexity SIZE POSSIBLE INTERACTIONS

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Effect of structure VS

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SIZE POSSIBLE INTERACTIONS Reduced exploding complexity

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Slashing complexity SIZE COMPLEXITY SPLIT!

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Making chunks early SIZE COMPLEXITY SPLIT!

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Net win? SIZE COMPLEXITY SPLIT! $ $

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You’re going to do it often SIZE DOUBLE SPLIT! COMPLEXITY NEW CODE  IN ENGINE NEW CODE  IN ENGINE

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Never build large apps to build large apps

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github.com/shageman/ the_next_big_thing

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5 looser coupling 3 gems 1 one app 4 engines 8 HTTP SOA 2 modules 7 eco-system 6 services

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1 The one app

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HTTP://WWW.FLICKR.COM/PHOTOS/WIDNR/6589525327/

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Examples ! diaspora, CF CC, canvas

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If you are in the situation where you’re reading some text, investigating, trying to ﬁgure out what is going on... That is a very good property of a detective novel and a very bad property of code. ! Martin Fowler

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ANNOYANCE ENTRY STRUCTURE

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2 The modularized app

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HTTP://EECUE.COM/P/31426/METAL-RECYCLING-YARD.HTML

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+ A higher level structure

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ANNOYANCE EMAIL SIGNUP STRUCTURE

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3 The gem component app

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+ Provable independence

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Choose modules that tell the story of the system and contain a cohesive set of concepts Eric Evans

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HTTP://WWW.SMASHINGMAGAZINE.COM/INFORMATION-AND-INSTRUCTIONAL-SIGNS-PART-1/

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ANNOYANCE EMAIL SIGNUP STRUCTURE

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4 The Rails component app

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+ Provable independence for Rails

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Rails Engines

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EMAIL SIGNUP TEASER STRUCTURE ANNOYANCE

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5 The loosely-coupled app

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+ Clearer responsibilities

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EMAIL SIGNUP TEASER STRUCTURE ANNOYANCE EVENT COUNTER

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6 The service-oriented app

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+ Reduced surface area

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588 194 LOGGER::COUNT EVENTCOUNTER::*.METHODS.COUNT LOGGER 361 115

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588 194 LOGGER::COUNT EVENTCOUNTER::*.METHODS.COUNT LOGGER 361 115 - OBJECT.METHODS LOGGER::COUNT LOGGER 394 0 247 1

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EMAIL SIGNUP TEASER STRUCTURE ANNOYANCE EVENT COUNTER

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7 The eco-system app

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gem build event_counter..

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gem push event_counter..

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EMAIL SIGNUP TEASER STRUCTURE ANNOYANCE EVENT COUNTER

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8 The HTTP SOA app

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PICTURE HERE

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STRUCTURE EMAIL SIGNUP TEASER ANNOYANCE EVENT COUNTER

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5 looser coupling 3 gems 1 one app 4 engines 8 HTTP SOA 2 modules 7 eco-system 6 services

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5 looser coupling 3 gems 1 one app 4 engines 8 HTTP SOA 2 modules 7 eco-system 6 services

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9 Architecture the reclaimed years

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HTTP://WWW.CONFREAKS.COM/VIDEOS/759-RUBYMIDWEST2011-KEYNOTE- ARCHITECTURE-THE-LOST-YEARS