本文整理汇总了Python中ZODB.FileStorage.FileStorage._txn_find方法的典型用法代码示例。如果您正苦于以下问题：Python FileStorage._txn_find方法的具体用法？Python FileStorage._txn_find怎么用？Python FileStorage._txn_find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ZODB.FileStorage.FileStorage的用法示例。
在下文中一共展示了FileStorage._txn_find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: RecoverTest
# 需要导入模块: from ZODB.FileStorage import FileStorage [as 别名]
# 或者: from ZODB.FileStorage.FileStorage import _txn_find [as 别名]
#.........这里部分代码省略.........
after.close()
self.assertEqual(before_guts, after_guts,
"recovery changed a non-damaged .fs file")
def testOneBlock(self):
for i in range(self.ITERATIONS):
self.damage(1, 1024)
output = self.recover()
self.assert_('error' in output, output)
self.recovered = FileStorage(self.dest)
self.recovered.close()
os.remove(self.path)
os.rename(self.dest, self.path)
def testFourBlocks(self):
for i in range(self.ITERATIONS):
self.damage(4, 512)
output = self.recover()
self.assert_('error' in output, output)
self.recovered = FileStorage(self.dest)
self.recovered.close()
os.remove(self.path)
os.rename(self.dest, self.path)
def testBigBlock(self):
for i in range(self.ITERATIONS):
self.damage(1, 32 * 1024)
output = self.recover()
self.assert_('error' in output, output)
self.recovered = FileStorage(self.dest)
self.recovered.close()
os.remove(self.path)
os.rename(self.dest, self.path)
def testBadTransaction(self):
# Find transaction headers and blast them.
L = self.storage.undoLog()
r = L[3]
tid = base64.decodestring(r["id"] + "\n")
pos1 = self.storage._txn_find(tid, 0)
r = L[8]
tid = base64.decodestring(r["id"] + "\n")
pos2 = self.storage._txn_find(tid, 0)
self.storage.close()
# Overwrite the entire header.
f = open(self.path, "a+b")
f.seek(pos1 - 50)
f.write("\0" * 100)
f.close()
output = self.recover()
self.assert_('error' in output, output)
self.recovered = FileStorage(self.dest)
self.recovered.close()
os.remove(self.path)
os.rename(self.dest, self.path)
# Overwrite part of the header.
f = open(self.path, "a+b")
f.seek(pos2 + 10)
f.write("\0" * 100)
f.close()
output = self.recover()
self.assert_('error' in output, output)
self.recovered = FileStorage(self.dest)
self.recovered.close()
# Issue 1846: When a transaction had 'c' status (not yet committed),
# the attempt to open a temp file to write the trailing bytes fell
# into an infinite loop.
def testUncommittedAtEnd(self):
# Find a transaction near the end.
L = self.storage.undoLog()
r = L[1]
tid = base64.decodestring(r["id"] + "\n")
pos = self.storage._txn_find(tid, 0)
# Overwrite its status with 'c'.
f = open(self.path, "r+b")
f.seek(pos + 16)
current_status = f.read(1)
self.assertEqual(current_status, ' ')
f.seek(pos + 16)
f.write('c')
f.close()
# Try to recover. The original bug was that this never completed --
# infinite loop in fsrecover.py. Also, in the ZODB 3.2 line,
# reference to an undefined global masked the infinite loop.
self.recover()
# Verify the destination got truncated.
self.assertEqual(os.path.getsize(self.dest), pos)
# Get rid of the temp file holding the truncated bytes.
os.remove(ZODB.fsrecover._trname)