69 lines
2.7 KiB
Python
69 lines
2.7 KiB
Python
#------------------------------------------------------------------------------
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# Copyright (c) 2019, 2022, Oracle and/or its affiliates.
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#
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# This software is dual-licensed to you under the Universal Permissive License
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# (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
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# 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
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# either license.
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#
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# If you elect to accept the software under the Apache License, Version 2.0,
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# the following applies:
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# call_timeout.py
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#
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# Demonstrates the use of the Oracle Client 18c feature that enables round
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# trips to the database to time out if a specified amount of time
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# (in milliseconds) has passed without a response from the database.
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#
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# This script requires Oracle Client 18.1 and higher when using thick mode.
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#------------------------------------------------------------------------------
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import oracledb
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import sample_env
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# determine whether to use python-oracledb thin mode or thick mode
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if not sample_env.get_is_thin():
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oracledb.init_oracle_client(lib_dir=sample_env.get_oracle_client())
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connection = oracledb.connect(user=sample_env.get_main_user(),
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password=sample_env.get_main_password(),
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dsn=sample_env.get_connect_string())
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connection.call_timeout = 2000
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print("Call timeout set at", connection.call_timeout, "milliseconds...")
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with connection.cursor() as cursor:
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cursor.execute("select sysdate from dual")
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today, = cursor.fetchone()
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print("Fetch of current date before timeout:", today)
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# dbms_session.sleep() replaces dbms_lock.sleep() from Oracle Database 18c
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sleep_proc_name = "dbms_session.sleep" \
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if int(connection.version.split(".")[0]) >= 18 \
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else "dbms_lock.sleep"
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print("Sleeping...should time out...")
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try:
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cursor.callproc(sleep_proc_name, (3,))
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except oracledb.DatabaseError as e:
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print("ERROR:", e)
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cursor.execute("select sysdate from dual")
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today, = cursor.fetchone()
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print("Fetch of current date after timeout:", today)
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