def self.scavenger
      if @scavenger.nil? || !@scavenger.alive?
        @scavenger = Thread.new do
          running = true
          while running do
            puts "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
            # Sleep before we actually start doing anything.
            # Otherwise we might clean up something we just made
            sleep(scavenger_interval)

            puts "BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB"

            lock.synchronize do
              pools.each do |pool|

                puts "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC"

                # This is a useful check, but non-essential, and right now it breaks lots of stuff.
                # if pool.expired?
                pool.lock.synchronize do

                  puts "DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD"

                  if pool.expired?

                    puts "EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"

                    v = pool.dispose

                    puts "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"

                    v
                  end
                end
                # end
              end

              # The pool is empty, we stop the scavenger
              # It wil be restarted if new resources are added again
              if pools.empty?
                puts "GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG"
                running = false
                puts "HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH"
                running
              end
            end
            puts "Extlib::Pooling.scavenger: loop"
          end # loop
        end
      end