""" Copyright (c) 2008-2020, Jesus Cea Avion 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')