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"""
TestCases for testing the locking sub-system.
"""
import os
from pprint import pprint
import shutil
import sys
import tempfile
import time
try:
from threading import Thread, currentThread
have_threads = 1
except ImportError:
have_threads = 0
import unittest
from bsddb.test.test_all import verbose
try:
# For Pythons w/distutils pybsddb
from bsddb3 import db
except ImportError:
# For Python 2.3
from bsddb import db
#----------------------------------------------------------------------
class LockingTestCase(unittest.TestCase):
def setUp(self):
self.homeDir = tempfile.mkdtemp('.test_lock')
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()
shutil.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, b"some locked thing", db.DB_LOCK_WRITE)
if verbose:
print("Aquired lock: %s" % lock)
time.sleep(1)
self.env.lock_put(lock)
if verbose:
print("Released lock: %s" % lock)
if db.version() >= (4,0):
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=(5, db.DB_LOCK_WRITE)))
threads.append(Thread(target = self.theThread,
args=(1, db.DB_LOCK_READ)))
threads.append(Thread(target = self.theThread,
args=(1, db.DB_LOCK_READ)))
threads.append(Thread(target = self.theThread,
args=(1, db.DB_LOCK_WRITE)))
threads.append(Thread(target = self.theThread,
args=(1, db.DB_LOCK_READ)))
threads.append(Thread(target = self.theThread,
args=(1, db.DB_LOCK_READ)))
threads.append(Thread(target = self.theThread,
args=(1, db.DB_LOCK_WRITE)))
threads.append(Thread(target = self.theThread,
args=(1, db.DB_LOCK_WRITE)))
threads.append(Thread(target = self.theThread,
args=(1, db.DB_LOCK_WRITE)))
for t in threads:
t.start()
for t in threads:
t.join()
def test03_set_timeout(self):
# test that the set_timeout call works
if hasattr(self.env, 'set_timeout'):
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 theThread(self, sleepTime, lockType):
name = currentThread().getName()
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))
lock = self.env.lock_get(anID, b"some locked thing", lockType)
if verbose:
print("%s: Aquired %s lock: %s" % (name, lt, lock))
time.sleep(sleepTime)
self.env.lock_put(lock)
if verbose:
print("%s: Released %s lock: %s" % (name, lt, lock))
if db.version() >= (4,0):
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')
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