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# Copyright 2022-2024 ETSI SDG TeraFlowSDN (TFS) (https://tfs.etsi.org/)
#
# 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.
import logging, socketio, threading
from common.tools.kafka.Variables import KafkaConfig, KafkaTopic
from kafka import KafkaConsumer
from .Constants import SIO_NAMESPACE, SIO_ROOM
logging.getLogger('kafka.client').setLevel(logging.WARNING)
logging.getLogger('kafka.cluster').setLevel(logging.WARNING)
logging.getLogger('kafka.conn').setLevel(logging.WARNING)
logging.getLogger('kafka.consumer.fetcher').setLevel(logging.WARNING)
logging.getLogger('kafka.consumer.group').setLevel(logging.WARNING)
logging.getLogger('kafka.consumer.subscription_state').setLevel(logging.WARNING)
logging.getLogger('kafka.metrics.metrics').setLevel(logging.WARNING)
logging.getLogger('kafka.protocol.parser').setLevel(logging.WARNING)
LOGGER = logging.getLogger(__name__)
class VntRecommThread(threading.Thread):
def __init__(self, namespace : socketio.Namespace):
super().__init__(daemon=True)
self._terminate = threading.Event()
self._namespace = namespace
def start(self):
self._terminate.clear()
return super().start()
def stop(self) -> None:
self._terminate.set()
def run(self):
LOGGER.info('[run] Starting...')
try:
kafka_consumer = KafkaConsumer(
bootstrap_servers = KafkaConfig.get_kafka_address(),
group_id = None, # consumer dispatch all messages sent to subscribed topics
auto_offset_reset = 'latest',
)
LOGGER.info('[run] Subscribing...')
kafka_consumer.subscribe(topics=[KafkaTopic.VNTMANAGER_REQUEST.value])
LOGGER.info('[run] Subscribed')
while not self._terminate.is_set():
records = kafka_consumer.poll(timeout_ms=1000, max_records=1)
if len(records) == 0: continue # no pending messages... continuing
MSG = '[run] records={:s}'
LOGGER.debug(MSG.format(str(records)))
raise NotImplementedError('parse kafka records and extract recommendation')
#if vntm_request.error():
# if vntm_request.error().code() == KafkaError._PARTITION_EOF: continue
# MSG = '[run] Consumer error: {:s}'
# LOGGER.error(MSG.format(str(vntm_request.error())))
# break
#message_key = vntm_request.key().decode('utf-8')
#message_value = vntm_request.value().decode('utf-8')
#MSG = '[run] Recommendation: key={:s} value={:s}'
#LOGGER.debug(MSG.format(str(message_key), str(message_value)))
#
#LOGGER.debug('[run] checking server namespace...')
#server : socketio.Server = self._namespace.server
#if server is None: continue
#LOGGER.debug('[run] emitting recommendation...')
#server.emit('recommendation', message_value, namespace=SIO_NAMESPACE, to=SIO_ROOM)
#LOGGER.debug('[run] emitted')
LOGGER.info('[run] Closing...')
kafka_consumer.close()
except: # pylint: disable=bare-except
LOGGER.exception('[run] Unexpected Thread Exception')
LOGGER.info('[run] Terminated')