# File lib/ruote/id/mnemo_wfid_generator.rb, line 45
    def generate

      t = Time.now.utc
      time = t.strftime('%Y%m%d-%H%M')
      ms = t.to_f % 60.0

      #c = @mutex.synchronize { @counter = (@counter + 1) % 100_000 }
      @counter = (@counter + 1) % 100_000
        #
        # no need to worry about skipping a beat, no mutex.

      s = "#{ms}!#{Thread.current.object_id}!#{@here}!#{@counter}"
      s = Digest::MD5.hexdigest(s)

      x = Rufus::Mnemo.from_i(s[0, 6].to_i(16))
      y = Rufus::Mnemo.from_i(s[6, 6].to_i(16))

      "#{time}-#{x}-#{y}"
    end