module DatasourceUtils
  extend ActiveSupport::Concern

  def get_cached_connection(data_source)

    connection = nil
    if $connections.include? data_source.id
      data = $connections[data_source.id]
      if data[:updated_at] === data_source.updated_at
        connection = $connections[data_source.id][:connection]
      end
    end

    connection            
  end

  def cache_connection(data_source, connection)
    $connections[data_source.id] = { connection: connection, updated_at: data_source.updated_at }
  end

end