OpenStack Networking (Neutron)
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# Copyright (c) 2016 Intel Corporation.
#
# 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
import netaddr
import six
from neutron.common import _constants as common_constants
from neutron.objects import base
class EndpointBase(base.NeutronDbObject):
primary_keys = ['ip_address']
@classmethod
def modify_fields_from_db(cls, db_obj):
result = super(EndpointBase, cls).modify_fields_from_db(db_obj)
if 'ip_address' in result:
result['ip_address'] = netaddr.IPAddress(result['ip_address'])
return result
@classmethod
def modify_fields_to_db(cls, fields):
result = super(EndpointBase, cls).modify_fields_to_db(fields)
if 'ip_address' in fields:
result['ip_address'] = cls.filter_to_str(result['ip_address'])
return result
@six.add_metaclass(abc.ABCMeta)
class SegmentAllocation(object):
@classmethod
def get_unallocated_segments(cls, context, **filters):
with cls.db_context_reader(context):
columns = set(dict(cls.db_model.__table__.columns))
model_filters = dict((k, filters[k])
for k in columns & set(filters.keys()))
query = context.session.query(cls.db_model).filter_by(
allocated=False, **model_filters)
return query.limit(common_constants.IDPOOL_SELECT_SIZE).all()
@classmethod
def allocate(cls, context, **segment):
with cls.db_context_writer(context):
return context.session.query(cls.db_model).filter_by(
allocated=False, **segment).update({'allocated': True})
@classmethod
def deallocate(cls, context, **segment):
with cls.db_context_writer(context):
return context.session.query(cls.db_model).filter_by(
allocated=True, **segment).update({'allocated': False})
@classmethod
def update_primary_keys(cls, _dict, segmentation_id=None, **kwargs):
_dict[cls.primary_keys[0]] = segmentation_id
@abc.abstractmethod
def get_segmentation_id(self):
pass
@property
def segmentation_id(self):
return self.db_obj.segmentation_id