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###
# ============LICENSE_START=======================================================
# Netconf Server
# ================================================================================
# Copyright (C) 2021 Nokia. All rights reserved.
# ================================================================================
# 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.
# ============LICENSE_END=========================================================
###
import logging
from kafka.producer.future import FutureRecordMetadata
from netconf_server.netconf_kafka_client import NetconfKafkaClient
from netconf_server.netconf_kafka_message_factory import NetconfKafkaMessageFactory
from netconf_server.sysrepo_interface.config_change_data import ConfigChangeData
from netconf_server.sysrepo_interface.sysrepo_message_model import SysrepoMessage
logger = logging.getLogger(__name__)
class NetconfChangeListener(object):
def __init__(self, subscriptions: list, kafka_client: NetconfKafkaClient, topic: str):
self.subscriptions = subscriptions
self.kafka_client = kafka_client
self.topic = topic
def run(self, session):
for subscription in self.subscriptions:
subscription.callback_function = self._on_module_configuration_change
subscription.subscribe_on_model_change(session)
def _on_module_configuration_change(self, config_change_data: ConfigChangeData):
logger.info("Received module changed: {} , {} ".format(config_change_data.event, config_change_data.changes))
if config_change_data.event != "done":
self._send_change_to_kafka(config_change_data)
def _send_change_to_kafka(self, config_change_data):
for change in config_change_data.changes:
try:
kafka_message = NetconfChangeListener._create_kafka_message(change)
logging.info("Sending message '{}' to Kafka '{}' topic".format(kafka_message, self.topic))
response = self.kafka_client.send(self.topic, kafka_message) # type: FutureRecordMetadata
logging.info("Response from Kafka: {}".format(response.get(timeout=1)))
except Exception as e:
logger.error("Exception occurred during handling of sysrepo config change", e)
logger.info("Module changes sent to Kafka. Operation finished.")
@staticmethod
def _create_kafka_message(change):
return NetconfKafkaMessageFactory.create(SysrepoMessage(change))
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