From 1 to 30: How to Refactor 1 Monolithic Application into 30 Independently Maintainable Applications
Location: Ballroom IV
As your business grows bigger, you just can’t stop adding new models/controllers to your original rails application – resulting in a messy, unmaintainable and difficult to deploy monolithic application. Its time to refactor. This talk will share our experience, results and best practices in splitting a single rails “application-system” into 30 independently maintainable yet interconnected applications.
After two and a half years of development (starting in pre-Rails 1.0 days!), our live-trainer English learning system now supported multiple roles (learner/trainer/trainer supervisor/sales/materials creation/support/etc) and an exhaustive list of features to support our complex business processes. We set ourselves a year-long goal of splitting this monolithic system into small cooperating applications that could be developed independently by individual developers. At the same time, we could not lose the usability cohesiveness and data-interdependence that defined the power of our system.
Through numerous iterations, many mistakes and a bit of pure-luck we developed an optimized process for the refactor and best practices for making 30 independent rails apps behave as one. The results: lower development time, greater stability and scalability and much higher developer happiness.
We’ll talk about specific code, measurements, pitfalls, plugins, process and best practices to answer questions such as:
- How to know where to split single applications into many. How to measure the result.
- How the applications should interact with each other. How to reduce administration and DRY configuration applications.
- How to share data among applications.
- How to DRY for common logic.
- How to make a consistent user experience.
- How to interact with non-Ruby technology; in our case Erlang, FreeSWITCH (VoIP) and Flex
Jonathan Palley has developed education technology for over 10 years and is co-founder at Idapted. He’s spoken frequently about Rails, iterative development and education technology at such events as SD2C ‘08 and ’09 (China’s largest development conference), The British Council English Research Symposium, RailsConf (‘07), ClueCon, and GloCALL. He was the first person to start an in-house Rails development team in Beijing (where he lives) and has fond memories of trying to build his own Rails plugin system before one existed. He studied physics and theater at Stanford University and can be seen performing monthly improv-comedy shows in Beijing’s theater district.
GuoLei is System Architect at Idapted developing a live-online learning system that connects trainers in the U.S. to English learners in China. In the past year over 30,000 lessons were delivered using the Idapted platform and it is the sole platform used for live training by the British Council, the pre-eminent global authority in English language learning. GuoLei began his enlightened Rails life in 2007 after years in the trenches developing Java software for the Central Government. He has a master in Computer Science from Beijing University of Aeronautics & Astronautics.
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