Python LockDir.attempt_lock方法代码示例

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_40_confirm_easy(self):
     """Confirm a lock that's already held"""
     t = self.get_transport()
     lf1 = LockDir(t, 'test_lock')
     lf1.create()
     lf1.attempt_lock()
     lf1.confirm()

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
    def test_30_lock_wait_fail(self):
        """Wait on a lock, then fail

        We ask to wait up to 400ms; this should fail within at most one
        second.  (Longer times are more realistic but we don't want the test
        suite to take too long, and this should do for now.)
        """
        t = self.get_transport()
        lf1 = LockDir(t, 'test_lock')
        lf1.create()
        lf2 = LockDir(t, 'test_lock')
        self.setup_log_reporter(lf2)
        lf1.attempt_lock()
        try:
            before = time.time()
            self.assertRaises(LockContention, lf2.wait_lock,
                              timeout=0.4, poll=0.1)
            after = time.time()
            # it should only take about 0.4 seconds, but we allow more time in
            # case the machine is heavily loaded
            self.assertTrue(after - before <= 8.0,
                "took %f seconds to detect lock contention" % (after - before))
        finally:
            lf1.unlock()
        self.assertEqual(1, len(self._logged_reports))
        self.assertContainsRe(self._logged_reports[0][0],
            r'Unable to obtain lock .* held by [email protected]\.com on .*'
            r' \(process #\d+\), acquired .* ago\.\n'
            r'Will continue to try until \d{2}:\d{2}:\d{2}, unless '
            r'you press Ctrl-C.\n'
            r'See "bzr help break-lock" for more.')

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_missing_lockdir_info(self):
     """We can cope with absent info files."""
     t = self.get_transport()
     t.mkdir('test_lock')
     t.mkdir('test_lock/held')
     lf = LockDir(t, 'test_lock')
     # In this case we expect the 'not held' result from peek, because peek
     # cannot be expected to notice that there is a 'held' directory with no
     # 'info' file.
     self.assertEqual(None, lf.peek())
     # And lock/unlock may work or give LockContention (but not any other
     # error).
     try:
         lf.attempt_lock()
     except LockContention:
         # LockContention is ok, and expected on Windows
         pass
     else:
         # no error is ok, and expected on POSIX (because POSIX allows
         # os.rename over an empty directory).
         lf.unlock()
     # Currently raises TokenMismatch, but LockCorrupt would be reasonable
     # too.
     self.assertRaises(
         (errors.TokenMismatch, errors.LockCorrupt),
         lf.validate_token, 'fake token')

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_42_confirm_broken_manually(self):
     """Confirm a lock broken by hand"""
     t = self.get_transport()
     lf1 = LockDir(t, 'test_lock')
     lf1.create()
     lf1.attempt_lock()
     t.move('test_lock', 'lock_gone_now')
     self.assertRaises(LockBroken, lf1.confirm)

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_21_peek_readonly(self):
     """Peek over a readonly transport"""
     t = self.get_transport()
     lf1 = LockDir(t, 'test_lock')
     lf1.create()
     lf2 = LockDir(self.get_readonly_transport(), 'test_lock')
     self.assertEqual(lf2.peek(), None)
     lf1.attempt_lock()
     info2 = lf2.peek()
     self.assertTrue(info2)
     self.assertEqual(info2['nonce'], lf1.nonce)

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_10_lock_uncontested(self):
     """Acquire and release a lock"""
     t = self.get_transport()
     lf = LockDir(t, 'test_lock')
     lf.create()
     lf.attempt_lock()
     try:
         self.assertTrue(lf.is_held)
     finally:
         lf.unlock()
         self.assertFalse(lf.is_held)

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
    def test_32_lock_wait_succeed(self):
        """Succeed when trying to acquire a lock that gets released

        One thread holds on a lock and then releases it; another 
        tries to lock it.
        """
        # This test sometimes fails like this:
        # Traceback (most recent call last):

        #   File "/home/pqm/bzr-pqm-workdir/home/+trunk/bzrlib/tests/
        # test_lockdir.py", line 247, in test_32_lock_wait_succeed
        #     self.assertEqual(1, len(self._logged_reports))
        # AssertionError: not equal:
        # a = 1
        # b = 0
        raise tests.TestSkipped("Test fails intermittently")
        t = self.get_transport()
        lf1 = LockDir(t, 'test_lock')
        lf1.create()
        lf1.attempt_lock()

        def wait_and_unlock():
            time.sleep(0.1)
            lf1.unlock()
        unlocker = Thread(target=wait_and_unlock)
        unlocker.start()
        try:
            lf2 = LockDir(t, 'test_lock')
            self.setup_log_reporter(lf2)
            before = time.time()
            # wait and then lock
            lf2.wait_lock(timeout=0.4, poll=0.1)
            after = time.time()
            self.assertTrue(after - before <= 1.0)
        finally:
            unlocker.join()

        # There should be only 1 report, even though it should have to
        # wait for a while
        lock_base = lf2.transport.abspath(lf2.path)
        self.assertEqual(1, len(self._logged_reports))
        self.assertEqual('%s %s\n'
                         '%s\n%s\n'
                         'Will continue to try until %s\n',
                         self._logged_reports[0][0])
        args = self._logged_reports[0][1]
        self.assertEqual('Unable to obtain', args[0])
        self.assertEqual('lock %s' % (lock_base,), args[1])
        self.assertStartsWith(args[2], 'held by ')
        self.assertStartsWith(args[3], 'locked ')
        self.assertEndsWith(args[3], ' ago')
        self.assertContainsRe(args[4], r'\d\d:\d\d:\d\d')

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_lock_with_buggy_rename(self):
     # test that lock acquisition handles servers which pretend they
     # renamed correctly but that actually fail
     t = transport.get_transport('brokenrename+' + self.get_url())
     ld1 = LockDir(t, 'test_lock')
     ld1.create()
     ld1.attempt_lock()
     ld2 = LockDir(t, 'test_lock')
     # we should fail to lock
     e = self.assertRaises(errors.LockContention, ld2.attempt_lock)
     # now the original caller should succeed in unlocking
     ld1.unlock()
     # and there should be nothing left over
     self.assertEquals([], t.list_dir('test_lock'))

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_43_break(self):
     """Break a lock whose caller has forgotten it"""
     t = self.get_transport()
     lf1 = LockDir(t, 'test_lock')
     lf1.create()
     lf1.attempt_lock()
     # we incorrectly discard the lock object without unlocking it
     del lf1
     # someone else sees it's still locked
     lf2 = LockDir(t, 'test_lock')
     holder_info = lf2.peek()
     self.assertTrue(holder_info)
     lf2.force_break(holder_info)
     # now we should be able to take it
     lf2.attempt_lock()
     lf2.confirm()

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_20_lock_contested(self):
     """Contention to get a lock"""
     t = self.get_transport()
     lf1 = LockDir(t, 'test_lock')
     lf1.create()
     lf1.attempt_lock()
     lf2 = LockDir(t, 'test_lock')
     try:
         # locking is between LockDir instances; aliases within
         # a single process are not detected
         lf2.attempt_lock()
         self.fail('Failed to detect lock collision')
     except LockContention, e:
         self.assertEqual(e.lock, lf2)
         self.assertContainsRe(str(e),
                 r'^Could not acquire.*test_lock.*$')

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_44_break_already_released(self):
     """Lock break races with regular release"""
     t = self.get_transport()
     lf1 = LockDir(t, 'test_lock')
     lf1.create()
     lf1.attempt_lock()
     # someone else sees it's still locked
     lf2 = LockDir(t, 'test_lock')
     holder_info = lf2.peek()
     # in the interim the lock is released
     lf1.unlock()
     # break should succeed
     lf2.force_break(holder_info)
     # now we should be able to take it
     lf2.attempt_lock()
     lf2.confirm()

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_20_lock_peek(self):
     """Peek at the state of a lock"""
     t = self.get_transport()
     lf1 = LockDir(t, 'test_lock')
     lf1.create()
     lf1.attempt_lock()
     # lock is held, should get some info on it
     info1 = lf1.peek()
     self.assertEqual(set(info1.keys()),
                      set(['user', 'nonce', 'hostname', 'pid', 'start_time']))
     # should get the same info if we look at it through a different
     # instance
     info2 = LockDir(t, 'test_lock').peek()
     self.assertEqual(info1, info2)
     # locks which are never used should be not-held
     self.assertEqual(LockDir(t, 'other_lock').peek(), None)

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_45_break_mismatch(self):
     """Lock break races with someone else acquiring it"""
     t = self.get_transport()
     lf1 = LockDir(t, 'test_lock')
     lf1.create()
     lf1.attempt_lock()
     # someone else sees it's still locked
     lf2 = LockDir(t, 'test_lock')
     holder_info = lf2.peek()
     # in the interim the lock is released
     lf1.unlock()
     lf3 = LockDir(t, 'test_lock')
     lf3.attempt_lock()
     # break should now *fail*
     self.assertRaises(LockBreakMismatch, lf2.force_break,
                       holder_info)
     lf3.unlock()

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
 def test_30_lock_wait_fail(self):
     """Wait on a lock, then fail
     
     We ask to wait up to 400ms; this should fail within at most one
     second.  (Longer times are more realistic but we don't want the test
     suite to take too long, and this should do for now.)
     """
     t = self.get_transport()
     lf1 = LockDir(t, 'test_lock')
     lf1.create()
     lf2 = LockDir(t, 'test_lock')
     self.setup_log_reporter(lf2)
     lf1.attempt_lock()
     try:
         before = time.time()
         self.assertRaises(LockContention, lf2.wait_lock,
                           timeout=0.4, poll=0.1)
         after = time.time()
         # it should only take about 0.4 seconds, but we allow more time in
         # case the machine is heavily loaded
         self.assertTrue(after - before <= 8.0, 
                 "took %f seconds to detect lock contention" % (after - before))
     finally:
         lf1.unlock()
     lock_base = lf2.transport.abspath(lf2.path)
     self.assertEqual(1, len(self._logged_reports))
     lock_url = lf2.transport.abspath(lf2.path)
     self.assertEqual('%s %s\n'
                      '%s\n%s\n'
                      'Will continue to try until %s, unless '
                      'you press Ctrl-C\n'
                      'If you\'re sure that it\'s not being '
                      'modified, use bzr break-lock %s',
                      self._logged_reports[0][0])
     args = self._logged_reports[0][1]
     self.assertEqual('Unable to obtain', args[0])
     self.assertEqual('lock %s' % (lock_base,), args[1])
     self.assertStartsWith(args[2], 'held by ')
     self.assertStartsWith(args[3], 'locked ')
     self.assertEndsWith(args[3], ' ago')
     self.assertContainsRe(args[4], r'\d\d:\d\d:\d\d')

# 需要导入模块: from bzrlib.lockdir import LockDir [as 别名]
# 或者: from bzrlib.lockdir.LockDir import attempt_lock [as 别名]
    def test_34_lock_write_waits(self):
        """LockDir.lock_write() will wait for the lock.""" 
        # the test suite sets the default to 0 to make deadlocks fail fast.
        # change it for this test, as we want to try a manual deadlock.
        raise tests.TestSkipped('Timing-sensitive test')
        bzrlib.lockdir._DEFAULT_TIMEOUT_SECONDS = 300
        t = self.get_transport()
        lf1 = LockDir(t, 'test_lock')
        lf1.create()
        lf1.attempt_lock()

        def wait_and_unlock():
            time.sleep(0.1)
            lf1.unlock()
        unlocker = Thread(target=wait_and_unlock)
        unlocker.start()
        try:
            lf2 = LockDir(t, 'test_lock')
            self.setup_log_reporter(lf2)
            before = time.time()
            # wait and then lock
            lf2.lock_write()
            after = time.time()
        finally:
            unlocker.join()

        # There should be only 1 report, even though it should have to
        # wait for a while
        lock_base = lf2.transport.abspath(lf2.path)
        self.assertEqual(1, len(self._logged_reports))
        self.assertEqual('%s %s\n'
                         '%s\n%s\n'
                         'Will continue to try until %s\n',
                         self._logged_reports[0][0])
        args = self._logged_reports[0][1]
        self.assertEqual('Unable to obtain', args[0])
        self.assertEqual('lock %s' % (lock_base,), args[1])
        self.assertStartsWith(args[2], 'held by ')
        self.assertStartsWith(args[3], 'locked ')
        self.assertEndsWith(args[3], ' ago')
        self.assertContainsRe(args[4], r'\d\d:\d\d:\d\d')