Class: Flipper::Adapters::Memory

Inherits:
Object
  • Object
show all
Includes:
Flipper::Adapter
Defined in:
lib/flipper/adapters/memory.rb

Overview

Public: Adapter for storing everything in memory (ie: Hash). Useful for tests/specs.

Constant Summary collapse

FeaturesKey = 
:flipper_features

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source = nil) ⇒ Memory

Public



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# File 'lib/flipper/adapters/memory.rb', line 16

def initialize(source = nil)
  @source = source || {}
  @name = :memory
end

Instance Attribute Details

#name ⇒ Object (readonly)

Public: The name of the adapter.



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# File 'lib/flipper/adapters/memory.rb', line 13

def name
  @name
end

Instance Method Details

#add(feature) ⇒ Object

Public: Adds a feature to the set of known features.



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# File 'lib/flipper/adapters/memory.rb', line 27

def add(feature)
  features.add(feature.key)
  true
end

#clear(feature) ⇒ Object

Public: Clears all the gate values for a feature.



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# File 'lib/flipper/adapters/memory.rb', line 41

def clear(feature)
  feature.gates.each do |gate|
    delete key(feature, gate)
  end
  true
end

#delete(key) ⇒ Object

Private



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# File 'lib/flipper/adapters/memory.rb', line 121

def delete(key)
  @source.delete(key.to_s)
end

#disable(feature, gate, thing) ⇒ Object

Public



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# File 'lib/flipper/adapters/memory.rb', line 81

def disable(feature, gate, thing)
  case gate.data_type
  when :boolean
    clear(feature)
  when :integer
    write key(feature, gate), thing.value.to_s
  when :set
    set_delete key(feature, gate), thing.value.to_s
  else
    raise "#{gate} is not supported by this adapter yet"
  end

  true
end

#enable(feature, gate, thing) ⇒ Object

Public



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# File 'lib/flipper/adapters/memory.rb', line 67

def enable(feature, gate, thing)
  case gate.data_type
  when :boolean, :integer
    write key(feature, gate), thing.value.to_s
  when :set
    set_add key(feature, gate), thing.value.to_s
  else
    raise "#{gate} is not supported by this adapter yet"
  end

  true
end

#ensure_set_initialized(key) ⇒ Object

Private



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# File 'lib/flipper/adapters/memory.rb', line 144

def ensure_set_initialized(key)
  @source[key.to_s] ||= Set.new
end

#features ⇒ Object

Public: The set of known features.



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# File 'lib/flipper/adapters/memory.rb', line 22

def features
  set_members(FeaturesKey)
end

#get(feature) ⇒ Object

Public



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# File 'lib/flipper/adapters/memory.rb', line 49

def get(feature)
  result = {}

  feature.gates.each do |gate|
    result[gate.key] = case gate.data_type
    when :boolean, :integer
      read key(feature, gate)
    when :set
      set_members key(feature, gate)
    else
      raise "#{gate} is not supported by this adapter yet"
    end
  end

  result
end

#inspect ⇒ Object

Public



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# File 'lib/flipper/adapters/memory.rb', line 97

def inspect
  attributes = [
    "name=:memory",
    "source=#{@source.inspect}",
  ]
  "#<#{self.class.name}:#{object_id} #{attributes.join(', ')}>"
end

#key(feature, gate) ⇒ Object

Private



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# File 'lib/flipper/adapters/memory.rb', line 106

def key(feature, gate)
  "#{feature.key}/#{gate.key}"
end

#read(key) ⇒ Object

Private



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# File 'lib/flipper/adapters/memory.rb', line 111

def read(key)
  @source[key.to_s]
end

#remove(feature) ⇒ Object

Public: Removes a feature from the set of known features and clears all the values for the feature.



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# File 'lib/flipper/adapters/memory.rb', line 34

def remove(feature)
  features.delete(feature.name.to_s)
  clear(feature)
  true
end

#set_add(key, value) ⇒ Object

Private



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# File 'lib/flipper/adapters/memory.rb', line 126

def set_add(key, value)
  ensure_set_initialized(key)
  @source[key.to_s].add(value.to_s)
end

#set_delete(key, value) ⇒ Object

Private



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# File 'lib/flipper/adapters/memory.rb', line 132

def set_delete(key, value)
  ensure_set_initialized(key)
  @source[key.to_s].delete(value.to_s)
end

#set_members(key) ⇒ Object

Private



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# File 'lib/flipper/adapters/memory.rb', line 138

def set_members(key)
  ensure_set_initialized(key)
  @source[key.to_s]
end

#write(key, value) ⇒ Object

Private



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# File 'lib/flipper/adapters/memory.rb', line 116

def write(key, value)
  @source[key.to_s] = value.to_s
end