83 lines
2.8 KiB
Python
83 lines
2.8 KiB
Python
# Copyright (c) 2016 Intel Corporation.
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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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import abc
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import netaddr
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import six
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from neutron.common import utils as n_utils
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from neutron.objects import base
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class EndpointBase(base.NeutronDbObject):
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primary_keys = ['ip_address']
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@classmethod
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def modify_fields_from_db(cls, db_obj):
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result = super(EndpointBase, cls).modify_fields_from_db(db_obj)
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if 'ip_address' in result:
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result['ip_address'] = netaddr.IPAddress(result['ip_address'])
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return result
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@classmethod
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def modify_fields_to_db(cls, fields):
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result = super(EndpointBase, cls).modify_fields_to_db(fields)
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if 'ip_address' in fields:
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result['ip_address'] = cls.filter_to_str(result['ip_address'])
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return result
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@six.add_metaclass(abc.ABCMeta)
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class SegmentAllocation(object):
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@classmethod
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def get_random_unallocated_segment(cls, context, **filters):
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with cls.db_context_reader(context):
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columns = set(dict(cls.db_model.__table__.columns))
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model_filters = dict((k, filters[k])
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for k in columns & set(filters.keys()))
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query = context.session.query(cls.db_model).filter_by(
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allocated=False, **model_filters)
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rand_func = n_utils.get_sql_random_method(
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context.session.bind.dialect.name)
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if rand_func:
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query = query.order_by(rand_func())
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return query.first()
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@classmethod
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def allocate(cls, context, **segment):
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with cls.db_context_writer(context):
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return context.session.query(cls.db_model).filter_by(
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allocated=False, **segment).update({'allocated': True})
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@classmethod
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def deallocate(cls, context, **segment):
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with cls.db_context_writer(context):
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return context.session.query(cls.db_model).filter_by(
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allocated=True, **segment).update({'allocated': False})
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@classmethod
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def update_primary_keys(cls, _dict, segmentation_id=None, **kwargs):
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_dict[cls.primary_keys[0]] = segmentation_id
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@abc.abstractmethod
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def get_segmentation_id(self):
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pass
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@property
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def segmentation_id(self):
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return self.db_obj.segmentation_id
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