Class: Dry::Effects::Effects::Lock

Inherits:
Module
  • Object
show all
Defined in:
lib/dry/effects/effects/lock.rb

Constant Summary collapse

Lock = 
Effect.new(type: :lock, name: :lock)
Meta = 
Effect.new(type: :lock, name: :meta)
Unlock = 
Effect.new(type: :lock, name: :unlock)
Locked = 
Effect.new(type: :lock, name: :locked?)

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Lock

Returns a new instance of Lock.



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# File 'lib/dry/effects/effects/lock.rb', line 12

def initialize
  super

  module_eval do
    define_method(:lock) do |key, meta: Undefined, &block|
      if block
        begin
          handle = ::Dry::Effects.yield(Lock.payload(key, meta))
          block.(!handle.nil?)
        ensure
          ::Dry::Effects.yield(Unlock.payload(handle)) if handle
        end
      else
        ::Dry::Effects.yield(Lock.payload(key, meta))
      end
    end

    define_method(:unlock) do |key|
      ::Dry::Effects.yield(Unlock.(key))
    end

    define_method(:locked?) do |key|
      ::Dry::Effects.yield(Locked.payload(key))
    end

    define_method(:lock_meta) do |key|
      ::Dry::Effects.yield(Meta.payload(key))
    end
  end
end