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SessionPool.py
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132 lines (120 loc) · 5.96 KB
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#------------------------------------------------------------------------------
# Copyright 2016, 2017, Oracle and/or its affiliates. All rights reserved.
#
# Portions Copyright 2007-2015, Anthony Tuininga. All rights reserved.
#
# Portions Copyright 2001-2007, Computronix (Canada) Ltd., Edmonton, Alberta,
# Canada. All rights reserved.
#------------------------------------------------------------------------------
"""Module for testing session pools."""
import threading
class TestConnection(TestCase):
def __ConnectAndDrop(self):
"""Connect to the database, perform a query and drop the connection."""
connection = self.pool.acquire()
cursor = connection.cursor()
cursor.execute("select count(*) from TestNumbers")
count, = cursor.fetchone()
self.assertEqual(count, 10)
def __ConnectAndGenerateError(self):
"""Connect to the database, perform a query which raises an error"""
connection = self.pool.acquire()
cursor = connection.cursor()
self.assertRaises(cx_Oracle.DatabaseError, cursor.execute,
"select 1 / 0 from dual")
def testPool(self):
"""test that the pool is created and has the right attributes"""
pool = cx_Oracle.SessionPool(USERNAME, PASSWORD, TNSENTRY, 2, 8, 3,
encoding = ENCODING, nencoding = NENCODING)
self.assertEqual(pool.username, USERNAME, "user name differs")
self.assertEqual(pool.tnsentry, TNSENTRY, "tnsentry differs")
self.assertEqual(pool.max, 8, "max differs")
self.assertEqual(pool.min, 2, "min differs")
self.assertEqual(pool.increment, 3, "increment differs")
self.assertEqual(pool.opened, 2, "opened differs")
self.assertEqual(pool.busy, 0, "busy not 0 at start")
connection_1 = pool.acquire()
self.assertEqual(pool.busy, 1, "busy not 1 after acquire")
self.assertEqual(pool.opened, 2, "opened not unchanged (1)")
connection_2 = pool.acquire()
self.assertEqual(pool.busy, 2, "busy not 2 after acquire")
self.assertEqual(pool.opened, 2, "opened not unchanged (2)")
connection_3 = pool.acquire()
self.assertEqual(pool.busy, 3, "busy not 3 after acquire")
self.assertEqual(pool.opened, 5, "opened not changed (3)")
pool.release(connection_3)
self.assertEqual(pool.busy, 2, "busy not 2 after release")
del connection_2
self.assertEqual(pool.busy, 1, "busy not 1 after del")
def testProxyAuth(self):
"""test that proxy authentication is possible"""
pool = cx_Oracle.SessionPool(USERNAME, PASSWORD, TNSENTRY, 2, 8, 3,
encoding = ENCODING, nencoding = NENCODING)
self.assertEqual(pool.homogeneous, 1,
"homogeneous should be 1 by default")
self.assertRaises(cx_Oracle.ProgrammingError, pool.acquire,
user = u"missing_proxyuser")
pool = cx_Oracle.SessionPool(USERNAME, PASSWORD, TNSENTRY, 2, 8, 3,
homogeneous = False, encoding = ENCODING,
nencoding = NENCODING)
self.assertEqual(pool.homogeneous, 0,
"homogeneous should be 0 after setting it in the constructor")
connection = pool.acquire(user = PROXY_USERNAME)
cursor = connection.cursor()
cursor.execute('select user from dual')
result, = cursor.fetchone()
self.assertEqual(result, PROXY_USERNAME.upper())
def testRollbackOnDel(self):
"connection rolls back before being destroyed"
pool = cx_Oracle.SessionPool(USERNAME, PASSWORD, TNSENTRY, 1, 8, 3,
encoding = ENCODING, nencoding = NENCODING)
connection = pool.acquire()
cursor = connection.cursor()
cursor.execute("truncate table TestTempTable")
cursor.execute("insert into TestTempTable (IntCol) values (1)")
pool = cx_Oracle.SessionPool(USERNAME, PASSWORD, TNSENTRY, 1, 8, 3,
encoding = ENCODING, nencoding = NENCODING)
connection = pool.acquire()
cursor = connection.cursor()
cursor.execute("select count(*) from TestTempTable")
count, = cursor.fetchone()
self.assertEqual(count, 0)
def testRollbackOnRelease(self):
"connection rolls back before released back to the pool"
pool = cx_Oracle.SessionPool(USERNAME, PASSWORD, TNSENTRY, 1, 8, 3,
encoding = ENCODING, nencoding = NENCODING)
connection = pool.acquire()
cursor = connection.cursor()
cursor.execute("truncate table TestTempTable")
cursor.execute("insert into TestTempTable (IntCol) values (1)")
cursor.close()
pool.release(connection)
pool = cx_Oracle.SessionPool(USERNAME, PASSWORD, TNSENTRY, 1, 8, 3,
encoding = ENCODING, nencoding = NENCODING)
connection = pool.acquire()
cursor = connection.cursor()
cursor.execute("select count(*) from TestTempTable")
count, = cursor.fetchone()
self.assertEqual(count, 0)
def testThreading(self):
"""test session pool to database with multiple threads"""
self.pool = cx_Oracle.SessionPool(USERNAME, PASSWORD, TNSENTRY, 5, 20,
2, threaded = True, encoding = ENCODING, nencoding = NENCODING)
threads = []
for i in range(20):
thread = threading.Thread(None, self.__ConnectAndDrop)
threads.append(thread)
thread.start()
for thread in threads:
thread.join()
def testThreadingWithErrors(self):
"""test session pool to database with multiple threads (with errors)"""
self.pool = cx_Oracle.SessionPool(USERNAME, PASSWORD, TNSENTRY, 5, 20,
2, threaded = True, encoding = ENCODING, nencoding = NENCODING)
threads = []
for i in range(20):
thread = threading.Thread(None, self.__ConnectAndGenerateError)
threads.append(thread)
thread.start()
for thread in threads:
thread.join()