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"""
Copyright (c) 2008-2020, Jesus Cea Avion <jcea@jcea.es>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
3. Neither the name of Jesus Cea Avion nor the names of its
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
"""
"""
TestCases for testing the locking sub-system.
"""
import time
import unittest
from test_all import db, test_support, verbose, have_threads, \
get_new_environment_path, get_new_database_path
if have_threads :
from threading import Thread
import sys
if sys.version_info[0] < 3 :
from threading import currentThread
else :
from threading import current_thread as currentThread
#----------------------------------------------------------------------
class LockingTestCase(unittest.TestCase):
def setUp(self):
self.homeDir = get_new_environment_path()
self.env = db.DBEnv()
self.env.open(self.homeDir, db.DB_THREAD | db.DB_INIT_MPOOL |
db.DB_INIT_LOCK | db.DB_CREATE)
def tearDown(self):
self.env.close()
test_support.rmtree(self.homeDir)
def test01_simple(self):
if verbose:
print '\n', '-=' * 30
print "Running %s.test01_simple..." % self.__class__.__name__
anID = self.env.lock_id()
if verbose:
print "locker ID: %s" % anID
lock = self.env.lock_get(anID, "some locked thing", db.DB_LOCK_WRITE)
if verbose:
print "Aquired lock: %s" % lock
self.env.lock_put(lock)
if verbose:
print "Released lock: %s" % lock
self.env.lock_id_free(anID)
def test02_threaded(self):
if verbose:
print '\n', '-=' * 30
print "Running %s.test02_threaded..." % self.__class__.__name__
threads = []
threads.append(Thread(target = self.theThread,
args=(db.DB_LOCK_WRITE,)))
threads.append(Thread(target = self.theThread,
args=(db.DB_LOCK_READ,)))
threads.append(Thread(target = self.theThread,
args=(db.DB_LOCK_READ,)))
threads.append(Thread(target = self.theThread,
args=(db.DB_LOCK_WRITE,)))
threads.append(Thread(target = self.theThread,
args=(db.DB_LOCK_READ,)))
threads.append(Thread(target = self.theThread,
args=(db.DB_LOCK_READ,)))
threads.append(Thread(target = self.theThread,
args=(db.DB_LOCK_WRITE,)))
threads.append(Thread(target = self.theThread,
args=(db.DB_LOCK_WRITE,)))
threads.append(Thread(target = self.theThread,
args=(db.DB_LOCK_WRITE,)))
for t in threads:
import sys
if sys.version_info[0] < 3 :
t.setDaemon(True)
else :
t.daemon = True
t.start()
for t in threads:
t.join()
def test03_lock_timeout(self):
self.env.set_timeout(0, db.DB_SET_LOCK_TIMEOUT)
self.assertEqual(self.env.get_timeout(db.DB_SET_LOCK_TIMEOUT), 0)
self.env.set_timeout(0, db.DB_SET_TXN_TIMEOUT)
self.assertEqual(self.env.get_timeout(db.DB_SET_TXN_TIMEOUT), 0)
self.env.set_timeout(123456, db.DB_SET_LOCK_TIMEOUT)
self.assertEqual(self.env.get_timeout(db.DB_SET_LOCK_TIMEOUT), 123456)
self.env.set_timeout(7890123, db.DB_SET_TXN_TIMEOUT)
self.assertEqual(self.env.get_timeout(db.DB_SET_TXN_TIMEOUT), 7890123)
def test04_lock_timeout2(self):
self.env.set_timeout(0, db.DB_SET_LOCK_TIMEOUT)
self.env.set_timeout(0, db.DB_SET_TXN_TIMEOUT)
self.env.set_timeout(123456, db.DB_SET_LOCK_TIMEOUT)
self.env.set_timeout(7890123, db.DB_SET_TXN_TIMEOUT)
def deadlock_detection() :
while not deadlock_detection.end :
deadlock_detection.count = \
self.env.lock_detect(db.DB_LOCK_EXPIRE)
if deadlock_detection.count :
while not deadlock_detection.end :
pass
break
time.sleep(0.01)
deadlock_detection.end=False
deadlock_detection.count=0
t=Thread(target=deadlock_detection)
import sys
if sys.version_info[0] < 3 :
t.setDaemon(True)
else :
t.daemon = True
t.start()
self.env.set_timeout(100000, db.DB_SET_LOCK_TIMEOUT)
anID = self.env.lock_id()
anID2 = self.env.lock_id()
self.assertNotEqual(anID, anID2)
lock = self.env.lock_get(anID, "shared lock", db.DB_LOCK_WRITE)
start_time=time.time()
self.assertRaises(db.DBLockNotGrantedError,
self.env.lock_get,anID2, "shared lock", db.DB_LOCK_READ)
end_time=time.time()
deadlock_detection.end=True
# Floating point rounding
self.assertTrue((end_time-start_time) >= 0.0999)
self.env.lock_put(lock)
t.join()
self.env.lock_id_free(anID)
self.env.lock_id_free(anID2)
self.assertTrue(deadlock_detection.count>0)
def theThread(self, lockType):
import sys
if sys.version_info[0] < 3 :
name = currentThread().getName()
else :
name = currentThread().name
if lockType == db.DB_LOCK_WRITE:
lt = "write"
else:
lt = "read"
anID = self.env.lock_id()
if verbose:
print "%s: locker ID: %s" % (name, anID)
for i in xrange(1000) :
lock = self.env.lock_get(anID, "some locked thing", lockType)
if verbose:
print "%s: Aquired %s lock: %s" % (name, lt, lock)
self.env.lock_put(lock)
if verbose:
print "%s: Released %s lock: %s" % (name, lt, lock)
self.env.lock_id_free(anID)
#----------------------------------------------------------------------
def test_suite():
suite = unittest.TestSuite()
if have_threads:
suite.addTest(unittest.makeSuite(LockingTestCase))
else:
suite.addTest(unittest.makeSuite(LockingTestCase, 'test01'))
return suite
if __name__ == '__main__':
unittest.main(defaultTest='test_suite')
|
