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# ============LICENSE_START===================================================
# Copyright (C) 2020 Nordix Foundation.
# ============================================================================
# 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.
#
# SPDX-License-Identifier: Apache-2.0
# ============LICENSE_END=====================================================
import mod.aai_client as aai
from mod import logger
from mod.subscription import AdministrativeState
class SubscriptionHandler:
def __init__(self, mr_pub, app, app_conf, aai_event_thread, policy_event_thread):
self.mr_pub = mr_pub
self.app = app
self.app_conf = app_conf
self.aai_event_thread = aai_event_thread
self.policy_event_thread = policy_event_thread
def execute(self):
"""
Checks for changes of administrative state in config and proceeds to process
the Subscription if a change has occurred
"""
self.app.app_context().push()
local_admin_state = self.app_conf.subscription.get_local_sub_admin_state()
new_administrative_state = self.app_conf.subscription.administrativeState
try:
if local_admin_state == new_administrative_state:
logger.info('Administrative State did not change in the Config')
else:
if new_administrative_state == AdministrativeState.UNLOCKED.value:
self._activate(local_admin_state, new_administrative_state)
elif local_admin_state == AdministrativeState.PENDING.value:
logger.info('Administrative State is PENDING')
else:
self._deactivate(local_admin_state, new_administrative_state)
except Exception as err:
logger.error(f'Error occurred during the activation/deactivation process {err}',
exc_info=True)
def _activate(self, local_admin_state, new_administrative_state):
logger.info(f'Administrative State has changed from {local_admin_state} '
f'to {new_administrative_state}.')
nfs_in_aai = aai.get_pmsh_nfs_from_aai(self.app_conf)
self.app_conf.subscription.activate_subscription(nfs_in_aai, self.mr_pub,
self.app_conf)
self.app_conf.subscription.update_subscription_status()
logger.info('Start listening for new NFs on AAI-EVENT topic in MR.')
self.aai_event_thread.start()
self.policy_event_thread.start()
def _deactivate(self, local_admin_state, new_administrative_state):
logger.info(f'Administrative State has changed from {local_admin_state} '
f'to {new_administrative_state}.')
self.aai_event_thread.cancel()
logger.info('Stop listening for NFs on AAI-EVENT topic in MR.')
self.app_conf.subscription.deactivate_subscription(self.mr_pub, self.app_conf)
self.app_conf.subscription.update_subscription_status()
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