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#!/usr/bin/env python3
#
# ============LICENSE_START====================================================
# Copyright (C) 2023 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======================================================
# Python utility to fetch kafka topic and look for required messages.
# Accepts the arguments {topic_name} and {list of expected values} and {timeout} to verify the kafka topic.
from confluent_kafka import Consumer, KafkaException
import sys
import time
def consume_kafka_topic(topic, expected_values, timeout):
config = {
'bootstrap.servers': 'localhost:29092',
'group.id': 'testgrp',
'auto.offset.reset': 'earliest'
}
consumer = Consumer(config)
consumer.subscribe([topic])
try:
start_time = time.time()
while time.time() - start_time < timeout:
msg = consumer.poll(1.0)
if msg is None:
continue
if msg.error():
if msg.error().code() == KafkaException._PARTITION_EOF:
sys.stderr.write(f"Reached end of topic {msg.topic()} / partition {msg.partition()}\n")
print('ERROR')
sys.exit(404)
else:
# Error
raise KafkaException(msg.error())
else:
# Message received
message = msg.value().decode('utf-8')
if verify_msg(expected_values, message):
print(message)
sys.exit(200)
finally:
consumer.close()
def verify_msg(expected_values, message):
for item in expected_values:
if item not in message:
return False
return True
if __name__ == '__main__':
topic_name = sys.argv[1]
timeout = sys.argv[2] # timeout in seconds for verifying the kafka topic
expected_values = sys.argv[3:]
consume_kafka_topic(topic_name, expected_values, timeout)
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