Source code for ceilometer.compute.pollsters

# Copyright 2014 Mirantis, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

import abc

from oslo_utils import timeutils
import six

from ceilometer.agent import plugin_base
from ceilometer.compute.virt import inspector as virt_inspector


@six.add_metaclass(abc.ABCMeta)
[docs]class BaseComputePollster(plugin_base.PollsterBase): @property def inspector(self): try: inspector = self._inspector except AttributeError: inspector = virt_inspector.get_hypervisor_inspector() BaseComputePollster._inspector = inspector return inspector @property def default_discovery(self): return 'local_instances' def _record_poll_time(self): """Method records current time as the poll time. :return: time in seconds since the last poll time was recorded """ current_time = timeutils.utcnow() duration = None if hasattr(self, '_last_poll_time'): duration = timeutils.delta_seconds(self._last_poll_time, current_time) self._last_poll_time = current_time return duration