class ServiceBureau::Locator
Finds service factories and instantiates services
Attributes
service_factories[R]
Public Class Methods
get_service(service_key, *args)
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Finds a factory and instantiates a service
@param service_key [Symbol] the service to look up @param args will be passed to the factory’s call method.
@return An instance of the service
@raise [UnknownServiceError] If a factory cannot be found. @raise [UncallableFactoryError] If a factory is found, but does not respond to call
# File lib/service_bureau/locator.rb, line 18 def self.get_service service_key, *args @instance ||= new @instance.get_service service_key, *args end
new()
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Initializes a new Locator
with the mapping of service keys to factories.
# File lib/service_bureau/locator.rb, line 5 def initialize @service_factories = ServiceBureau::Locations.factory_map end
Public Instance Methods
get_service(service_key, *args)
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(see .get_service)
# File lib/service_bureau/locator.rb, line 24 def get_service service_key, *args service_factories.fetch(service_key).call *args rescue KeyError raise UnknownServiceError.new("Cannot locate factory for '#{service_key}' - please check your configuration") rescue NoMethodError => err if err.message =~ /undefined method `call'/ raise UncallableFactoryError.new("The factory registered for '#{service_key}' did not respond to #call") else raise end end