class Application < Merb::Controller
  before :login_required

  private

  def login_required
    unless session[:user_id]
      throw :halt, Proc.new {
        |c| c.redirect url(:controller => 'sessions', :
          method => 'new')
      }
    end
						end
						end
						class Sessions < Application
  skip_before :login_required, :only => %w{ new create }
end