configure_protocol

configure_protocol_example.rb

# If a dependency exposes the interface #configure, call it on instantiation with with the dependant
# example


class Utils
  class Logger
    
    attr_accessor :log_subject
    
    dependency :logger, Logger, instance: Rails.logger
    
    def configure(log_subject)
      @log_subkect = log_subject.class.name.dasherize
    end
    
    def info(msg)
      logger.info "[#{@log_subject}] #{msg}"
    end
    
    def debug(msg)
      logger.debug "[#{@log_subject}] #{msg}"
    end
    
    def trace(msg)
      logger.trace "[#{@log_subject}] #{msg}"
    end
    
    def error(msg)
      logger.error "[#{@log_subject}] #{msg}"
    end
    
  end
end

module DependencySupport
  
  def dependency(name, klass)
#     normal dependency initialization code
#     if the dependency implements the configuration protocol, configure it.
    dependency_instance.configure(self) if dependency_instance.respond_to? :configre
    
  end
  
end