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# Copyright 2015 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.
""" VNF Controller interface
"""
import logging
class VnfController(object):
"""VNF controller class
Used to set-up and control VNFs for specified scenario
Attributes:
_vnf_class: A class object representing the VNF to be used.
_deployment_scenario: A string describing the scenario to set-up in the
constructor.
_vnfs: A list of vnfs controlled by the controller.
"""
def __init__(self, deployment_scenario, vnf_class):
"""Sets up the VNF infrastructure for the PVP deployment scenario.
:param vnf_class: The VNF class to be used.
"""
self._logger = logging.getLogger(__name__)
self._vnf_class = vnf_class
self._deployment_scenario = deployment_scenario.upper()
if self._deployment_scenario == 'P2P':
self._vnfs = []
if self._deployment_scenario == 'PVP':
self._vnfs = [vnf_class()]
elif self._deployment_scenario == 'PVVP':
self._vnfs = [vnf_class(), vnf_class()]
self._logger.debug('__init__ ' + str(len(self._vnfs)) +
' VNF[s] with ' + ' '.join(map(str, self._vnfs)))
def get_vnfs(self):
"""Returns a list of vnfs controlled by this controller.
"""
self._logger.debug('get_vnfs ' + str(len(self._vnfs)) +
' VNF[s] with ' + ' '.join(map(str, self._vnfs)))
return self._vnfs
def start(self):
"""Boots all VNFs set-up by __init__.
This is a blocking function.
"""
self._logger.debug('start ' + str(len(self._vnfs)) +
' VNF[s] with ' + ' '.join(map(str, self._vnfs)))
for vnf in self._vnfs:
vnf.start()
def stop(self):
"""Stops all VNFs set-up by __init__.
This is a blocking function.
"""
self._logger.debug('stop ' + str(len(self._vnfs)) +
' VNF[s] with ' + ' '.join(map(str, self._vnfs)))
for vnf in self._vnfs:
vnf.stop()
def __enter__(self):
self.start()
def __exit__(self, type_, value, traceback):
self.stop()
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