Class: Flipper::AdapterBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/flipper/adapter_builder.rb

Overview

Builds an adapter from a stack of adapters.

adapter = Flipper::AdapterBuilder.new do
  use Flipper::Adapters::Strict
  use Flipper::Adapters::Memoizable
  store Flipper::Adapters::Memory
end.to_adapter

Instance Method Summary collapse

Constructor Details

#initialize(&block) ⇒ AdapterBuilder

Returns a new instance of AdapterBuilder.



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# File 'lib/flipper/adapter_builder.rb', line 11

def initialize(&block)
  @stack = []

  # Default to memory adapter
  store Flipper::Adapters::Memory

  block.arity == 0 ? instance_eval(&block) : block.call(self) if block
end

Instance Method Details

#store(adapter, *args, &block) ⇒ Object 



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# File 'lib/flipper/adapter_builder.rb', line 31

def store(adapter, *args, **kwargs, &block)
  @store = adapter.respond_to?(:call) ? adapter : -> { adapter.new(*args, **kwargs, &block) }
end

#to_adapter ⇒ Object 



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# File 'lib/flipper/adapter_builder.rb', line 40

def to_adapter
  @stack.reverse.inject(@store.call) { |adapter, wrapper| wrapper.call(adapter) }
end

#use(klass, *args, &block) ⇒ Object 



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# File 'lib/flipper/adapter_builder.rb', line 21

def use(klass, *args, **kwargs, &block)
  @stack.push ->(adapter) { klass.new(adapter, *args, **kwargs, &block) }
end