active?

# File activerecord/lib/active_record/connection_adapters/oracle_adapter.rb, line 192
        def active?
          # Pings the connection to check if it's still good. Note that an
          # #active? method is also available, but that simply returns the
          # last known state, which isn't good enough if the connection has
          # gone stale since the last use.
          @connection.ping
        rescue OCIException
          false
        end