本文整理汇总了Python中samba.samdb.SamDB.transaction_prepare_commit方法的典型用法代码示例。如果您正苦于以下问题：Python SamDB.transaction_prepare_commit方法的具体用法？Python SamDB.transaction_prepare_commit怎么用？Python SamDB.transaction_prepare_commit使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类samba.samdb.SamDB的用法示例。
在下文中一共展示了SamDB.transaction_prepare_commit方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: DsdbLockTestCase
# 需要导入模块: from samba.samdb import SamDB [as 别名]
# 或者: from samba.samdb.SamDB import transaction_prepare_commit [as 别名]
class DsdbLockTestCase(SamDBTestCase):
def test_db_lock1(self):
basedn = self.samdb.get_default_basedn()
(r1, w1) = os.pipe()
pid = os.fork()
if pid == 0:
# In the child, close the main DB, re-open just one DB
del(self.samdb)
gc.collect()
self.samdb = SamDB(session_info=self.session,
lp=self.lp)
self.samdb.transaction_start()
dn = "cn=test_db_lock_user,cn=users," + str(basedn)
self.samdb.add({
"dn": dn,
"objectclass": "user",
})
self.samdb.delete(dn)
# Obtain a write lock
self.samdb.transaction_prepare_commit()
os.write(w1, b"prepared")
time.sleep(2)
# Drop the write lock
self.samdb.transaction_cancel()
os._exit(0)
self.assertEqual(os.read(r1, 8), b"prepared")
start = time.time()
# We need to hold this iterator open to hold the all-record lock.
res = self.samdb.search_iterator()
# This should take at least 2 seconds because the transaction
# has a write lock on one backend db open
# Release the locks
for l in res:
pass
end = time.time()
self.assertGreater(end - start, 1.9)
(got_pid, status) = os.waitpid(pid, 0)
self.assertEqual(got_pid, pid)
self.assertTrue(os.WIFEXITED(status))
self.assertEqual(os.WEXITSTATUS(status), 0)
def test_db_lock2(self):
basedn = self.samdb.get_default_basedn()
(r1, w1) = os.pipe()
(r2, w2) = os.pipe()
pid = os.fork()
if pid == 0:
# In the child, close the main DB, re-open
del(self.samdb)
gc.collect()
self.samdb = SamDB(session_info=self.session,
lp=self.lp)
# We need to hold this iterator open to hold the all-record lock.
res = self.samdb.search_iterator()
os.write(w2, b"start")
if (os.read(r1, 7) != b"started"):
os._exit(1)
os.write(w2, b"add")
if (os.read(r1, 5) != b"added"):
os._exit(2)
# Wait 2 seconds to block prepare_commit() in the child.
os.write(w2, b"prepare")
time.sleep(2)
# Release the locks
for l in res:
pass
if (os.read(r1, 8) != b"prepared"):
os._exit(3)
os._exit(0)
# We can start the transaction during the search
# because both just grab the all-record read lock.
self.assertEqual(os.read(r2, 5), b"start")
self.samdb.transaction_start()
os.write(w1, b"started")
self.assertEqual(os.read(r2, 3), b"add")
dn = "cn=test_db_lock_user,cn=users," + str(basedn)
self.samdb.add({
"dn": dn,
#.........这里部分代码省略.........