Release new features using feature sliders

A presentation of the arturo gem

Transcript

1. Release new features using feature sliders Dimiter Petrov @crackofdusk 20 November 2013
2. Introduction
3. A feature can be too large for a single development cycle
4. A feature may need testing by a small group before being deployed to all users
5. You need fine-grained control over feature deployment
6. Feature sliders
7. Feature sliders Turn on and off features for some of the users
8. Feature sliders with the arturo gem
9. Integrating arturo in your application 1. Create migration for features table 2. Add configuration initializer 3. Mount arturo engine in the router 4. Run migration 5. Use arturo helpers to wrap features
10. Features table Needs a column for feature names and a column for deployment percentage
11. Deployment percentage? Feature X can be deployed to m percent of the users
12. Deployment percentage? Feature X can be deployed to m percent of the users Deterministic: a feature is consistently enabled from now on for that m percent of users unless you decrease the deployment percentage.
13. Feature conditionals
14. Controller filters class ReservationsController < ApplicationController require_feature :reserve_table end
15. Conditional evaluation def widgets_for_sidebar widgets = [] widgets << twitter_widget if feature_enabled?(:tweeting) # ... widgets end
16. Conditional evaluation <% if_feature_enabled(:reserve_table) %> <%= link_to ’Reserve a table’, new_restaurant_reservation_path(restaurant) %> <% end %>
17. Feature conditionals oustide controllers Arturo.feature_enabled_for?(:reserve_table, recipient) Arturo.reserve_table_enabled_for?(recepient)
18. Fine-grained control
19. Whitelists & blacklists # config/initializers/arturo_initializer.rb Arturo::Feature.whitelist(:awesome) do |user| user.account.premium? end Arturo::Feature.blacklist(:goodies) do |user| user.account.free? end
20. Feature recepients The current “thing” that is in the category thatisthebasisfordeployingnewfeatures. E.g: a user, an account, a project, a venue,…
21. Feature recepients # config/initializers/arturo_initializer.rb Arturo.feature_recipient do current_project end
22. Feature administration
23. Feature administration Navigate to /features and manage features from the mounted rails engine
24. Administration permissions # Default permissions current_user.present? && current_user.admin?
25. Administration permissions # Default permissions current_user.present? && current_user.admin? # config/initializers/arturo_initializer.rb Arturo.permit_management do signed_in? && current_user.can?(:manage_features) end
26. Live demo https://github.com/happydawn/arturo-test
27. Thank you!