raw_aq_async.py

# -----------------------------------------------------------------------------
# Copyright (c) 2025, Oracle and/or its affiliates.
#
# Portions Copyright 2007-2015, Anthony Tuininga. All rights reserved.
#
# Portions Copyright 2001-2007, Computronix (Canada) Ltd., Edmonton, Alberta,
# Canada. All rights reserved.
#
# This software is dual-licensed to you under the Universal Permissive License
# (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
# 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
# either license.
#
# If you elect to accept the software under the Apache License, Version 2.0,
# the following applies:
#
# 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
#
# https://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.
# -----------------------------------------------------------------------------

# -----------------------------------------------------------------------------
# raw_aq.py
#
# Demonstrates how to use advanced queuing with RAW data. It makes use of a
# RAW queue created in the sample setup.
# -----------------------------------------------------------------------------

importasyncio

importoracledb
importsample_env

QUEUE_NAME="DEMO_RAW_QUEUE"
PAYLOAD_DATA= [
"The first message",
"The second message",
"The third message",
"The fourth and final message",
]


asyncdefmain():
connection=awaitoracledb.connect_async(
user=sample_env.get_main_user(),
password=sample_env.get_main_password(),
dsn=sample_env.get_connect_string(),
 )

# create a queue
queue=connection.queue(QUEUE_NAME)
queue.deqoptions.wait=oracledb.DEQ_NO_WAIT
queue.deqoptions.navigation=oracledb.DEQ_FIRST_MSG

# dequeue all existing messages to ensure the queue is empty, just so
# that the results are consistent
whileawaitqueue.deqone():
pass

# enqueue a few messages
print("Enqueuing messages...")
fordatainPAYLOAD_DATA:
print(data)
awaitqueue.enqone(connection.msgproperties(payload=data))
awaitconnection.commit()

# dequeue the messages
print("\nDequeuing messages...")
whileTrue:
props=awaitqueue.deqone()
ifnotprops:
break
print(props.payload.decode())
awaitconnection.commit()
print("\nDone.")


asyncio.run(main())