91 lines
3.5 KiB
Python
91 lines
3.5 KiB
Python
#------------------------------------------------------------------------------
|
|
# Copyright (c) 2016, 2022, 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.
|
|
#------------------------------------------------------------------------------
|
|
|
|
#------------------------------------------------------------------------------
|
|
# database_change_notification.py
|
|
#
|
|
# Demonstrates using database change notification in Python, a feature that is
|
|
# available in Oracle 10g Release 2. Once this script is running, use another
|
|
# session to insert, update or delete rows from the table TestTempTable and you
|
|
# will see the notification of that change.
|
|
#------------------------------------------------------------------------------
|
|
|
|
import time
|
|
|
|
import oracledb
|
|
import sample_env
|
|
|
|
# this script is currently only supported in python-oracledb thick mode
|
|
oracledb.init_oracle_client(lib_dir=sample_env.get_oracle_client())
|
|
|
|
registered = True
|
|
|
|
def callback(message):
|
|
global registered
|
|
print("Message type:", message.type)
|
|
if not message.registered:
|
|
print("Deregistration has taken place...")
|
|
registered = False
|
|
return
|
|
print("Message database name:", message.dbname)
|
|
print("Message tranasction id:", message.txid)
|
|
print("Message tables:")
|
|
for table in message.tables:
|
|
print("--> Table Name:", table.name)
|
|
print("--> Table Operation:", table.operation)
|
|
if table.rows is not None:
|
|
print("--> Table Rows:")
|
|
for row in table.rows:
|
|
print("--> --> Row RowId:", row.rowid)
|
|
print("--> --> Row Operation:", row.operation)
|
|
print("-" * 60)
|
|
print("=" * 60)
|
|
|
|
connection = oracledb.connect(user=sample_env.get_main_user(),
|
|
password=sample_env.get_main_password(),
|
|
dsn=sample_env.get_connect_string(),
|
|
events=True)
|
|
|
|
sub = connection.subscribe(callback=callback, timeout=1800,
|
|
qos=oracledb.SUBSCR_QOS_ROWIDS, client_initiated=True)
|
|
print("Subscription:", sub)
|
|
print("--> Connection:", sub.connection)
|
|
print("--> ID:", sub.id)
|
|
print("--> Callback:", sub.callback)
|
|
print("--> Namespace:", sub.namespace)
|
|
print("--> Protocol:", sub.protocol)
|
|
print("--> Timeout:", sub.timeout)
|
|
print("--> Operations:", sub.operations)
|
|
print("--> Rowids?:", bool(sub.qos & oracledb.SUBSCR_QOS_ROWIDS))
|
|
sub.registerquery("select * from TestTempTable")
|
|
|
|
while registered:
|
|
print("Waiting for notifications....")
|
|
time.sleep(5)
|