78 lines
2.2 KiB
Python
78 lines
2.2 KiB
Python
#------------------------------------------------------------------------------
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# Copyright (c) 2019, 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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# BulkAQ.py
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# This script demonstrates how to use bulk enqueuing and dequeuing of
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# messages with advanced queuing using cx_Oracle. It makes use of a RAW queue
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# created in the sample setup.
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#
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# This script requires cx_Oracle 7.2 and higher.
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#------------------------------------------------------------------------------
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from __future__ import print_function
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import cx_Oracle
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import SampleEnv
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QUEUE_NAME = "DEMORAW"
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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 message",
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"The fifth message",
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"The sixth message",
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"The seventh message",
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"The eighth message",
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"The ninth message",
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"The tenth message",
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"The eleventh message",
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"The twelfth and final message"
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]
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# connect to database
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connection = cx_Oracle.connect(SampleEnv.GetMainConnectString())
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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 = cx_Oracle.DEQ_NO_WAIT
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queue.deqOptions.navigation = cx_Oracle.DEQ_FIRST_MSG
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# dequeue all existing messages to ensure the queue is empty, just so that
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# the results are consistent
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while queue.deqOne():
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pass
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# enqueue a few messages
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print("Enqueuing messages...")
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batchSize = 6
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dataToEnq = PAYLOAD_DATA
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while dataToEnq:
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batchData = dataToEnq[:batchSize]
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dataToEnq = dataToEnq[batchSize:]
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messages = [connection.msgproperties(payload=d) for d in batchData]
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for data in batchData:
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print(data)
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queue.enqMany(messages)
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connection.commit()
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# dequeue the messages
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print("\nDequeuing messages...")
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batchSize = 8
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while True:
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messages = queue.deqMany(batchSize)
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if not messages:
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break
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for props in messages:
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print(props.payload.decode())
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connection.commit()
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print("\nDone.")
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