47 lines
1.7 KiB
Python
47 lines
1.7 KiB
Python
#------------------------------------------------------------------------------
|
|
# Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
|
|
#------------------------------------------------------------------------------
|
|
|
|
#------------------------------------------------------------------------------
|
|
# aq_notification.py
|
|
# This script demonstrates using advanced queuing notification. Once this
|
|
# script is running, use another session to enqueue a few messages to the
|
|
# "DEMO_BOOK_QUEUE" queue. This is most easily accomplished by running the
|
|
# object_aq.py sample.
|
|
#
|
|
# This script requires cx_Oracle 6.4 and higher.
|
|
#------------------------------------------------------------------------------
|
|
|
|
import time
|
|
|
|
import cx_Oracle as oracledb
|
|
import sample_env
|
|
|
|
registered = True
|
|
|
|
def process_messages(message):
|
|
global registered
|
|
print("Message type:", message.type)
|
|
if message.type == oracledb.EVENT_DEREG:
|
|
print("Deregistration has taken place...")
|
|
registered = False
|
|
return
|
|
print("Queue name:", message.queueName)
|
|
print("Consumer name:", message.consumerName)
|
|
|
|
connection = oracledb.connect(sample_env.get_main_connect_string(),
|
|
events=True)
|
|
sub = connection.subscribe(namespace=oracledb.SUBSCR_NAMESPACE_AQ,
|
|
name="DEMO_BOOK_QUEUE", callback=process_messages,
|
|
timeout=300)
|
|
print("Subscription:", sub)
|
|
print("--> Connection:", sub.connection)
|
|
print("--> Callback:", sub.callback)
|
|
print("--> Namespace:", sub.namespace)
|
|
print("--> Protocol:", sub.protocol)
|
|
print("--> Timeout:", sub.timeout)
|
|
|
|
while registered:
|
|
print("Waiting for notifications....")
|
|
time.sleep(5)
|