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# Copyright 2015-2018 Intel Corporation., Tieto
#
# 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.
"""Interface for deployment specific vSwitch controllers
"""
import logging
class IVswitchController(object):
"""Interface class for a vSwitch controller object
This interface is used to setup and control a vSwitch provider for a
particular deployment scenario.
"""
def __init__(self, deployment, vswitch_class, traffic):
"""Initializes up the generic prerequisites for deployment scenario.
:deployment: the deployment scenario to configure
:vswitch_class: the vSwitch class to be used.
:traffic: dictionary with detailed traffic definition
"""
self._logger = logging.getLogger(__name__)
self._vswitch_class = vswitch_class
self._vswitch = vswitch_class()
self._deployment_scenario = deployment
self._logger.debug('Creation using %s', str(self._vswitch_class))
self._traffic = traffic.copy()
self._bridge = None
def setup(self):
"""Sets up the switch for the particular deployment scenario
"""
raise NotImplementedError(
"The VswitchController does not implement the \"setup\" function.")
def stop(self):
"""Tears down the switch created in setup()
"""
raise NotImplementedError(
"The VswitchController does not implement the \"stop\" function.")
def __enter__(self):
"""Sets up the switch for the particular deployment scenario
"""
self.setup()
def __exit__(self, type_, value, traceback):
"""Tears down the switch created in setup()
"""
self.stop()
def get_vswitch(self):
"""Get the controlled vSwitch
:return: The controlled IVswitch
"""
return self._vswitch
def get_ports_info(self):
"""Returns a dictionary describing all ports on the vSwitch.
See IVswitch for dictionary structure details
"""
raise NotImplementedError(
"The VswitchController does not implement the \"get_ports_info\" "
"function.")
def dump_vswitch_connections(self):
""" Dumps connections from vswitch
"""
raise NotImplementedError(
"The VswitchController does not implement the "
"\"dump_vswitch_connections\" function.")
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