dynamic map url to class using rack?

[gsw <garysweaver@gmail.com>]

Hey,

I have a serious newb question, so hopefully it isn't too nuts. I'd
like to be able to do something like this dynamically:

map "/(service)/(version)/*" do
  run (module corresponding to service)::(module corresponding to
version)::Controller
end

I don't think this is currently possible, but maybe I'm wrong. Might
it be possible in the future with rack, or would that be a bad idea?

I know that currently I could do it non-dynamically like:

map "/actual_service_name" do
  map "/actual_version_name" do
    run ActualServiceName::ActualVersionName::Controller
  end

  map "/another_actual_version_name" do
    run ActualServiceName::AnotherActualVersionName::Controller
  end
end

map "/another_actual_service_name" do
  map "/actual_version_name" do
    run AnotherActualServiceName::ActualVersionName::Controller
  end

  map "/another_actual_version_name" do
    run AnotherActualServiceName::AnotherActualVersionName::Controller
  end
end

The goal is have Sinatra controller classes that extend Sinatra::Base
in directories like:

/lib/service_name/version_name/controller.rb
/lib/service_name/another_version_name/controller.rb
/lib/another_service_name/version_name/controller.rb
/lib/another_service_name/another_version_name/controller.rb

Thanks in advance!
Gary