Component-Based Rails Applications - Ruby Unconf Hamburg 2019

Transcript

1. Gharbi Mohammed Software Engineer at Event Inc mgharbik@gmail.com @mgharbik
2. Component-based rails applications
3. • Part 1 ◦ Monolithic obstacles ◦ Namespaces ◦ Introduction to Engines ◦ Split the app into portions • Part 2 ◦ Speed up deployment ◦ Decrease memory usage ◦ Deploy to separate servers Content
4. Monolithic Rails App
5. Namespaces
6. Namespaces Modularity
7. Namespaces Modularity Dependency structure
8. Component-Based Rails Application
9. Component-Based Rails Application
10. What is a Rails engine? A mini Rails application that can be mountable inside your main Rails application.
11. $ rails plugin new admin_ui --mountable Engine
13. Usage
14. $ bundle exec rake engine_name:install:migrations Migrations
15. Migrations
16. Tests
17. Running all tests together
20. Integration to the main app
21. Gemfile
22. Routes
23. Benefits • Component based architecture is complementary to good object oriented practices • Engines use namespaces • It enforces an internal dependency structure • Cleaner Gemfile • Cleaner routes.rb • Fast tests • Team collaboration
24. logic admin_ui public_ui api dashboard_ui
25. Part 2 $ bundle install --with test development
26. Bundler groups $ bundle install --without test development
27. Bundler groups
28. Speed up deployment $ bundle --without api public Gems in the group api and public were not installed.
29. Speed up deployment BUNDLE_WITHOUT environment variable
30. Decrease memory usage
31. Decrease memory usage
32. Decrease memory usage
33. Public UI Admin UI $ RUNNING_MODE=public rails s $ RUNNING_MODE=admin rails s http://my-cbra-app.com http://my-cbra-app-super-secret-domain.com/admin
34. memory_usage = `ps -o rss= -p #{Process.pid}`.to_i render text: "Ruby process memory usage #{memory_usage} KB" Benchmarking a practical example localhost:3000/benchmark
35. Running admin only: Ruby process memory usage 256548 KB Running everything api, public, dashboard and admin: Ruby process memory usage 356032 KB Benchmarking a practical example
36. • https://github.com/plataformatec/devise • https://github.com/solidusio/solidus Examples
37. https://github.com/mgharbik/sportsball-cbra Repo
38. https://www.gofundme.com/kindergarten-needs-a-hand- near-engaruka-tanzania
39. Thank you
40. • http://teotti.com/topics/component-based-rails-architecture/ • http://tech.taskrabbit.com/blog/2014/02/11/rails-4-engines • https://leanpub.com/cbra Resources