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# ============LICENSE_START===================================================
# Copyright (C) 2019-2020 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 sys
import threading
import mod.aai_client as aai
import mod.pmsh_logging as logger
from mod import db, create_app, launch_api_server
from mod.aai_event_handler import process_aai_events
from mod.config_handler import ConfigHandler
from mod.pmsh_utils import AppConfig, PeriodicTask
from mod.subscription import Subscription, AdministrativeState
def subscription_processor(config_handler, administrative_state, mr_pub, app,
mr_aai_event_subscriber):
"""
Checks for changes of administrative state in config and proceeds to process
the Subscription if a change has occurred
Args:
config_handler (ConfigHandler): Configuration Handler used to get config
administrative_state (str): The administrative state
mr_pub (_MrPub): MR publisher
app (db): DB application
mr_aai_event_subscriber (_MrSub): AAI events MR subscriber
"""
app.app_context().push()
config = config_handler.get_config()
new_administrative_state = config['policy']['subscription']['administrativeState']
polling_period = 30.0
try:
if administrative_state == new_administrative_state:
logger.debug('Administrative State did not change in the Config')
else:
logger.debug(f'Administrative State changed from "{administrative_state}" "to '
f'"{new_administrative_state}".')
sub, nfs = aai.get_pmsh_subscription_data(config)
sub.process_subscription(nfs, mr_pub)
aai_event_thread = PeriodicTask(10, process_aai_events, args=(mr_aai_event_subscriber,
sub, mr_pub, app))
if new_administrative_state == AdministrativeState.UNLOCKED.value:
logger.debug('Listening to AAI-EVENT topic in MR.')
aai_event_thread.start()
else:
logger.debug('Stopping to listen to AAI-EVENT topic in MR.')
aai_event_thread.cancel()
except Exception as err:
logger.debug(f'Error occurred during the activation/deactivation process {err}')
threading.Timer(polling_period, subscription_processor,
[config_handler, new_administrative_state, mr_pub, app,
mr_aai_event_subscriber]).start()
def main():
try:
config_handler = ConfigHandler()
config = config_handler.get_config()
app_conf = AppConfig(**config['config'])
app = create_app()
app.app_context().push()
db.create_all(app=app)
sub, nfs = aai.get_pmsh_subscription_data(config)
mr_pub = app_conf.get_mr_pub('policy_pm_publisher')
mr_sub = app_conf.get_mr_sub('policy_pm_subscriber')
mr_aai_event_subscriber = app_conf.get_mr_sub('aai_subscriber')
initial_start_delay = 5.0
administrative_state = AdministrativeState.LOCKED.value
subscription_in_db = Subscription.get(sub.subscriptionName)
if subscription_in_db is not None:
administrative_state = subscription_in_db.status
threading.Timer(initial_start_delay, subscription_processor,
[config_handler, administrative_state, mr_pub,
app, mr_aai_event_subscriber]).start()
threading.Timer(20.0, mr_sub.poll_policy_topic, [sub.subscriptionName, app]).start()
launch_api_server(app_conf)
except Exception as e:
logger.debug(f'Failed to Init PMSH: {e}')
sys.exit(e)
if __name__ == '__main__':
main()
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