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stream_subscriber_1.py
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stream_subscriber_1.py
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#
# (C) Copyright 2022 Pavel Tisnovsky
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Eclipse Public License v1.0
# which accompanies this distribution, and is available at
# http://www.eclipse.org/legal/epl-v10.html
#
# Contributors:
# Pavel Tisnovsky
#
import asyncio
import nats
URL = "192.168.1.34:44853"
NATS_USERNAME = "local"
NATS_PASSWORD = "--password--"
SUBJECT_NAME = "bar"
async def on_message(message):
print(f"Received message {message}")
await message.ack()
async def main():
print(f"Connecting to NATS at address {URL}")
nats_connection = await nats.connect(
URL, user=NATS_USERNAME, password=NATS_PASSWORD
)
print("Connected...")
print("Retrieving JetStream object")
jet_stream = nats_connection.jetstream()
print(f"Retrieved {jet_stream}")
print("Waiting for messages")
sub = await jet_stream.subscribe(SUBJECT_NAME, cb=on_message)
while True:
await sub.next_msg(timeout=1)
print("Closing connection")
await nats_connection.close()
print("Connection closed")
if __name__ == "__main__":
asyncio.run(main())