def Execute(self, message):
    """This function parses the RDFValue from the server.

    The Run method will be called with the specified RDFValue.

    Args:
      message:     The GrrMessage that we are called to process.

    Returns:
       Upon return a callback will be called on the server to register
       the end of the function and pass back exceptions.
    Raises:
       RuntimeError: The arguments from the server do not match the expected
                     rdf type.
    """
    self.message = message
    if message:
      self.require_fastpoll = message.require_fastpoll

    args = None
    try:
      if self.message.args_rdf_name:
        if not self.in_rdfvalue:
          raise RuntimeError("Did not expect arguments, got %s." %
                             self.message.args_rdf_name)

        if self.in_rdfvalue.__name__ != self.message.args_rdf_name:
          raise RuntimeError(
              "Unexpected arg type %s != %s." %
              (self.message.args_rdf_name, self.in_rdfvalue.__name__))

        args = self.message.payload

      # Only allow authenticated messages in the client
      if self._authentication_required and (
          self.message.auth_state !=
          rdf_flows.GrrMessage.AuthorizationState.AUTHENTICATED):
        raise RuntimeError("Message for %s was not Authenticated." %
                           self.message.name)

      self.cpu_start = self.proc.cpu_times()
      self.cpu_limit = self.message.cpu_limit

      if getattr(flags.FLAGS, "debug_client_actions", False):
        pdb.set_trace()

      try:
        self.Run(args)

      # Ensure we always add CPU usage even if an exception occurred.
      finally:
        used = self.proc.cpu_times()
        self.cpu_used = (used.user - self.cpu_start.user,
                         used.system - self.cpu_start.system)

    except NetworkBytesExceededError as e:
      self.SetStatus(rdf_flows.GrrStatus.ReturnedStatus.NETWORK_LIMIT_EXCEEDED,
                     "%r: %s" % (e, e), traceback.format_exc())

    # We want to report back all errors and map Python exceptions to
    # Grr Errors.
    except Exception as e:  # pylint: disable=broad-except
      self.SetStatus(rdf_flows.GrrStatus.ReturnedStatus.GENERIC_ERROR,
                     "%r: %s" % (e, e), traceback.format_exc())

      if flags.FLAGS.pdb_post_mortem:
        self.DisableNanny()
        pdb.post_mortem()

    if self.status.status != rdf_flows.GrrStatus.ReturnedStatus.OK:
      logging.info("Job Error (%s): %s", self.__class__.__name__,
                   self.status.error_message)

      if self.status.backtrace:
        logging.debug(self.status.backtrace)

    if self.cpu_used:
      self.status.cpu_time_used.user_cpu_time = self.cpu_used[0]
      self.status.cpu_time_used.system_cpu_time = self.cpu_used[1]

    # This returns the error status of the Actions to the flow.
    self.SendReply(self.status, message_type=rdf_flows.GrrMessage.Type.STATUS)

    self._RunGC()