```ruby
module Msf


  ##
  #
  # This module defines all of the DB database tables
  # and creates ActiveRecord objects for each one of them
  #
  ##

  class DBManager

    class Lock
      @@mutex = Mutex.new
      def self.mutex
        @@mutex
      end
    end


    #
    # This inclusion makes sure the connection pool of ActiveRecord is purged frequently
    #
    module DBSave

      def self.included(mod)
        class << mod
          def find(*args)
            ActiveRecord::Base.connection_pool.clear_stale_cached_connections! if ActiveRecord::Base.connection_pool
            super(*args)
          end

          def save(*args)
            ActiveRecord::Base.connection_pool.clear_stale_cached_connections! if ActiveRecord::Base.connection_pool
            super(*args)
          end

        end
      end

    end

  end
end

```

Remove old connection flushing code (triggers warnings in AR 3.2)
user
```ruby
module Msf


	#
	#
	# This module defines all of the DB database tables
	# and creates ActiveRecord objects for each one of them
	#
	##

	class DBManager
	
		# Stub for future hooks
		module DBSave
		
		end
	end
end

```
assistant