Synnefo » snf-ganeti

    self._last_serial = self._ReadSerial()

    if self._last_serial is None:

      raise errors.ConfigurationError("Can't read/parse the job queue serial"

                                      " file")

  @staticmethod

  def _ReadSerial():

    """Try to read the job serial file.

    @rtype: None or int

    @return: If the serial can be read, then it is returned. Otherwise None

             is returned.

    """

      serial_fd = open(constants.JOB_QUEUE_SERIAL_FILE, "r")

      try:

        # Read last serial

        serial = int(serial_fd.read(1024).strip())

      finally:

        serial_fd.close()

    except (ValueError, EnvironmentError):

      serial = None

    return serial

    if self._ReadSerial() is None:

      utils.WriteFile(constants.JOB_QUEUE_SERIAL_FILE,

                      data="%s\n" % 0)