Flipper::Cassanity

A Cassanity adapter for Flipper.

Installation

Add this line to your application's Gemfile:

gem 'flipper-cassanity'

And then execute:

$ bundle

Or install it yourself as:

$ gem install flipper-cassanity

Usage

# Assumes keyspace created and column family exists with this schema:
#   {
#     primary_key: [:key, :field],
#     columns: {
#       key: :text,
#       field: :text,
#       value: :text,
#     },
#   }

require 'flipper/adapters/cassanity'
column_family = Cassanity::Client.new[:cassanity][:flipper]
adapter = Flipper::Adapters::Cassanity.new(column_family)
flipper = Flipper.new(adapter)
# profit...

Internals

Each feature is stored in a single row, which means getting a feature is single query.

require 'flipper/adapters/cassanity'
column_family = Cassanity::Client.new[:cassanity][:flipper]
adapter = Flipper::Adapters::Cassanity.new(column_family)
flipper = Flipper.new(adapter)

# Register a few groups.
Flipper.register(:admins) { |thing| thing.admin? }
Flipper.register(:early_access) { |thing| thing.early_access? }

# Create a user class that has flipper_id instance method.
User = Struct.new(:flipper_id)

flipper[:stats].enable
flipper[:stats].enable flipper.group(:admins)
flipper[:stats].enable flipper.group(:early_access)
flipper[:stats].enable User.new('25')
flipper[:stats].enable User.new('90')
flipper[:stats].enable User.new('180')
flipper[:stats].enable flipper.random(15)
flipper[:stats].enable flipper.actors(45)

flipper[:search].enable

puts 'all docs in collection'
pp column_family.select
# all docs in collection
# [{"_id"=>"stats",
#   "actors"=>["25", "90", "180"],
#   "boolean"=>"true",
#   "groups"=>["admins", "early_access"],
#   "percentage_of_actors"=>"45",
#   "percentage_of_random"=>"15"},
#  {"_id"=>"flipper_features", "features"=>["stats", "search"]},
#  {"_id"=>"search", "boolean"=>"true"}]
puts

puts 'flipper get of feature'
pp adapter.get(flipper[:stats])
# flipper get of feature
# {:boolean=>"true",
#  :groups=>#<Set: {"admins", "early_access"}>,
#  :actors=>#<Set: {"25", "90", "180"}>,
#  :percentage_of_actors=>"45",
#  :percentage_of_random=>"15"}

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request