Reloading bunch of files from rails engine in development

I have a rails engine. In initializer it requires a bunch of files from some folder. In this file user of my engine defines code, business logic, configures engine, etc.. All this data is stored statically in my engine main module

module MyEngine

  class << self      def application         @application ||= MyEngine::Application      end   end

end

I want this files to be reloaded on each request to application in development mode. (So that the user don't have to reload server to see changes he just made) Of course I can do something like this instead of initializer

config.to_prepare do   MyEngine.application.clear!   load('some/file') end

But this way i will have issues (because constants defined in this file wont really reloaded)

The ideal solution would be to make my whole engine reloadable on each request, but a have not found the way to do it.