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#------------------------------------------------------------------------------
# connect_pool.py (Section 2.1)
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
# Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
#------------------------------------------------------------------------------
import cx_Oracle
import threading
import db_config
pool = cx_Oracle.SessionPool(db_config.user, db_config.pw, db_config.dsn,
min = 2, max = 5, increment = 1, threaded = True,
getmode = cx_Oracle.SPOOL_ATTRVAL_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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