68 lines
2.0 KiB
Python
68 lines
2.0 KiB
Python
#------------------------------------------------------------------------------
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# Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
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#
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# Portions Copyright 2007-2015, Anthony Tuininga. All rights reserved.
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#
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# Portions Copyright 2001-2007, Computronix (Canada) Ltd., Edmonton, Alberta,
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# Canada. All rights reserved.
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# multi_consumer_aq.py
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# This script demonstrates how to use multi-consumer advanced queuing. It
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# makes use of a RAW queue created in the sample setup.
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#
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# This script requires cx_Oracle 8.2 and higher.
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#------------------------------------------------------------------------------
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import cx_Oracle as oracledb
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import sample_env
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QUEUE_NAME = "DEMO_RAW_QUEUE_MULTI"
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PAYLOAD_DATA = [
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"The first message",
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"The second message",
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"The third message",
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"The fourth and final message"
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]
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# connect to database
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connection = oracledb.connect(sample_env.get_main_connect_string())
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cursor = connection.cursor()
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# create queue
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queue = connection.queue(QUEUE_NAME)
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queue.deqoptions.wait = oracledb.DEQ_NO_WAIT
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queue.deqoptions.navigation = oracledb.DEQ_FIRST_MSG
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# enqueue a few messages
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print("Enqueuing messages...")
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for data in PAYLOAD_DATA:
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print(data)
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queue.enqone(connection.msgproperties(payload=data))
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connection.commit()
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print()
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# dequeue the messages for consumer A
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print("Dequeuing the messages for consumer A...")
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queue.deqoptions.consumername = "SUBSCRIBER_A"
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while True:
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props = queue.deqone()
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if not props:
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break
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print(props.payload.decode())
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connection.commit()
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print()
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# dequeue the message for consumer B
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print("Dequeuing the messages for consumer B...")
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queue.deqoptions.consumername = "SUBSCRIBER_B"
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while True:
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props = queue.deqone()
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if not props:
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break
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print(props.payload.decode())
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connection.commit()
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print("\nDone.")
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