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# ------------------------------------------------------------------------------
# connect_pool.py (Section 2.1)
# ------------------------------------------------------------------------------
# ------------------------------------------------------------------------------
# Copyright (c) 2017, 2022, Oracle and/or its affiliates.
#
# 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.
# ------------------------------------------------------------------------------
import oracledb
import threading
import db_config
pool = oracledb.create_pool(user=db_config.user, password=db_config.pw, dsn=db_config.dsn,
min=2, max=5, increment=1, getmode=oracledb.POOL_GETMODE_WAIT)
def Query():
con = pool.acquire()
cur = con.cursor()
for i in range(4):
cur.execute("select myseq.nextval from dual")
seqval, = cur.fetchone()
print("Thread", threading.current_thread().name,
"fetched sequence =", seqval)
thread1 = threading.Thread(name='#1', target=Query)
thread1.start()
thread2 = threading.Thread(name='#2', target=Query)
thread2.start()
thread1.join()
thread2.join()
print("All done!")
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