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# Copyright 2013 IBM Corp.
#
#    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 nova.openstack.common import log as logging


LOG = logging.getLogger(__name__)


class ZVMBaseVIFDriver(object):
    @abc.abstractmethod
    def plug(self, instance, vif):
        pass

    @abc.abstractmethod
    def unplug(self, instance, vif):
        pass


class ZVMNeutronVIFDriver(ZVMBaseVIFDriver):
    """Neutron VIF driver."""

    def plug(self, instance, vif):
        # Neutron takes care of plugging the port
        pass

    def unplug(self, instance, vif):
        # Neutron takes care of unplugging the port
        pass