Class: ConfigurationService::DecoratorRegistry

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/configuration_service/decorator_registry.rb

Overview

A singleton registry of configuration service decorators

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.instance ⇒ ConfigurationService::DecoratorRegistry

The singleton registry instance



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# File 'lib/configuration_service/decorator_registry.rb', line 15

class DecoratorRegistry

  include Singleton

  ##
  # Register a configuration service decorator
  #
  # @param [String] identifier
  #   unique identifier for the configuration service decorator
  # @param [Class] decorator 
  #   the configuration service decorator class
  #
  def register(identifier, decorator)
    @decorators[identifier] = decorator 
  end

  ##
  # Look up a configuration service decorator 
  #
  # @param [String] identifier
  #   the unique identifier for the configuration service decorator.
  #   The decorator must already have been registered with {#register}.
  #
  # @return [Class] the configuration service decorator class
  # @return [nil] if no decorator has been registered with the given +identifier+
  #
  def lookup(identifier)
    raise ConfigurationService::DecoratorNotFoundError, "Decorator not found in registry" if not @decorators.key?(identifier)
    @decorators[identifier]
  end

  # @private
  def initialize
    @decorators = {}
  end

end

Instance Method Details

#lookup(identifier) ⇒ Class?

Look up a configuration service decorator

Raises:



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# File 'lib/configuration_service/decorator_registry.rb', line 41

def lookup(identifier)
  raise ConfigurationService::DecoratorNotFoundError, "Decorator not found in registry" if not @decorators.key?(identifier)
  @decorators[identifier]
end

#register(identifier, decorator) ⇒ Object

Register a configuration service decorator



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# File 'lib/configuration_service/decorator_registry.rb', line 27

def register(identifier, decorator)
  @decorators[identifier] = decorator 
end