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# 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 importutils
interface_map = {
'vsctl': 'vif_plug_ovs.ovsdb.impl_vsctl',
'native': 'vif_plug_ovs.ovsdb.impl_idl',
}
def get_instance(context, iface_name=None):
"""Return the configured OVSDB API implementation"""
iface = importutils.import_module(
interface_map[iface_name or context.interface])
return iface.api_factory(context)
class ImplAPI(metaclass=abc.ABCMeta):
@abc.abstractmethod
def has_table_column(self, table, column):
"""Check if a column exists in a database table
:param table: (string) table name
:param column: (string) column name
:return: True if the column exists, False if not.
"""
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