54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
# Copyright 2014 OpenStack Foundation
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from oslo_log import log as logging
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from trove.db import get_db_api
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LOG = logging.getLogger(__name__)
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def persisted_models():
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return {'conductor_lastseen': LastSeen}
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class LastSeen(object):
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"""A table used only by Conductor to discard messages that arrive
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late and out of order.
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"""
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_auto_generated_attrs = []
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_data_fields = ['instance_id', 'method_name', 'sent']
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_table_name = 'conductor_lastseen'
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preserve_on_delete = False
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def __init__(self, instance_id, method_name, sent):
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self.instance_id = instance_id
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self.method_name = method_name
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self.sent = sent
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def save(self):
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return get_db_api().save(self)
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@classmethod
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def load(cls, instance_id, method_name):
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seen = get_db_api().find_by(cls,
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instance_id=instance_id,
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method_name=method_name)
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return seen
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@classmethod
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def create(cls, instance_id, method_name, sent):
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seen = LastSeen(instance_id, method_name, sent)
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return seen.save()
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