CallTimeout.py

#------------------------------------------------------------------------------
# Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
#------------------------------------------------------------------------------

#------------------------------------------------------------------------------
# CallTimeout.py
#
# Demonstrate the use of the Oracle Client 18c feature that enables round trips
# to the database to time out if a specified amount of time (in milliseconds)
# has passed without a response from the database.
#
# This script requires cx_Oracle 7.0 and higher and Oracle Client 18.1 and
# higher.
#------------------------------------------------------------------------------

from __future__ import print_function

import cx_Oracle
import SampleEnv

connection = cx_Oracle.connect(SampleEnv.GetMainConnectString())
connection.callTimeout = 2000
print("Call timeout set at", connection.callTimeout, "milliseconds...")

cursor = connection.cursor()
cursor.execute("select sysdate from dual")
today, = cursor.fetchone()
print("Fetch of current date before timeout:", today)

print("Sleeping...should time out...")
try:
    cursor.callproc("dbms_lock.sleep", (3,))
except cx_Oracle.DatabaseError as e:
    print("ERROR:", e)

cursor.execute("select sysdate from dual")
today, = cursor.fetchone()
print("Fetch of current date after timeout:", today)