# File lib/ferret/index.rb, line 792
792:     def persist(directory, create = true)
793:       synchronize do
794:         close_all()
795:         old_dir = @dir
796:         if directory.is_a?(String)
797:           @dir = FSDirectory.new(directory, create)
798:         elsif directory.is_a?(Ferret::Store::Directory)
799:           @dir = directory
800:         end
801:         @dir.extend(MonitorMixin) unless @dir.kind_of? MonitorMixin
802:         @options[:dir] = @dir
803:         @options[:create_if_missing] = true
804:         add_indexes([old_dir])
805:       end
806:     end