class Metrics::Config

def require_backend(env = ENV)
	if backend = env["METRICS_BACKEND"]
		begin
			if require(backend)
				Metrics.singleton_class.prepend(Backend::Interface)
				
				return true
			end
		rescue LoadError => error
			warn "Unable to load metrics backend: #{backend.inspect}!"
		end
	end
	
	return false
end