93 lines
3.0 KiB
Python
93 lines
3.0 KiB
Python
# Copyright 2011 OpenStack Foundation
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from datetime import datetime
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from datetime import timedelta
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from oslo_log import log as logging
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from trove.common import cfg
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from trove.common import exception
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from trove.common.i18n import _
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from trove.common import timeutils
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from trove.common import utils
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from trove.db import get_db_api
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from trove.db import models as dbmodels
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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def persisted_models():
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return {'agent_heartbeats': AgentHeartBeat}
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class AgentHeartBeat(dbmodels.DatabaseModelBase):
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"""Defines the state of a Guest Agent."""
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_data_fields = ['instance_id', 'updated_at', 'guest_agent_version',
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'deleted', 'deleted_at']
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_table_name = 'agent_heartbeats'
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def __init__(self, **kwargs):
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super(AgentHeartBeat, self).__init__(**kwargs)
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@classmethod
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def create(cls, **values):
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values['id'] = utils.generate_uuid()
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heartbeat = cls(**values).save()
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if not heartbeat.is_valid():
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raise exception.InvalidModelError(errors=heartbeat.errors)
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return heartbeat
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def save(self):
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if not self.is_valid():
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raise exception.InvalidModelError(errors=self.errors)
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self['updated_at'] = timeutils.utcnow()
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LOG.debug("Saving %(name)s: %(dict)s",
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{'name': self.__class__.__name__, 'dict': self.__dict__})
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return get_db_api().save(self)
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@classmethod
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def find_all_by_version(cls, guest_agent_version, deleted=0):
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if guest_agent_version is None:
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raise exception.ModelNotFoundError()
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heartbeats = cls.find_all(guest_agent_version=guest_agent_version,
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deleted=deleted)
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if heartbeats is None or heartbeats.count() == 0:
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raise exception.ModelNotFoundError(
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guest_agent_version=guest_agent_version)
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return heartbeats
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@classmethod
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def find_by_instance_id(cls, instance_id):
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if instance_id is None:
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raise exception.ModelNotFoundError(instance_id=instance_id)
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try:
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return cls.find_by(instance_id=instance_id)
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except exception.NotFound:
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LOG.exception(_("Error finding instance %s"), instance_id)
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raise exception.ModelNotFoundError(instance_id=instance_id)
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@staticmethod
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def is_active(agent):
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return (datetime.now() - agent.updated_at <
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timedelta(seconds=CONF.agent_heartbeat_time))
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