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annotate test/test_locking.py @ 6610:db3f0ba75b4a

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Change checkpoint_data and restore_connection_on_error to subtransaction checkpoint_data and restore_connection_on_error used to commit() and rollback() the db connection. This causes additional I/O and load. Changed them to use 'SAVEPOINT name' and 'ROLLBACK TO name' to get a faster method for handling errors within a tranaction. One thing to note is that postgresql (unlike SQL std) doesn't overwrite an older savepoint with he same name. It keeps all savepoints but only rolls back to the newest one with a given name. This could be a resource issue. I left a commented out release statement in case somebody runs into an issue due to too many savepoints. I expect it to slow down the import but....
author John Rouillard <rouilj@ieee.org>
date Sat, 29 Jan 2022 11:29:36 -0500
parents 35ea9b1efc14
children fed0f839c260
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1 # Copyright (c) 2002 ekit.com Inc (http://www.ekit-inc.com/)
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2 #
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3 # Permission is hereby granted, free of charge, to any person obtaining a copy
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4 # of this software and associated documentation files (the "Software"), to deal
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5 # in the Software without restriction, including without limitation the rights
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6 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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7 # copies of the Software, and to permit persons to whom the Software is
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8 # furnished to do so, subject to the following conditions:
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9 #
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10 # The above copyright notice and this permission notice shall be included in
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11 # all copies or substantial portions of the Software.
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12 #
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13 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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18 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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19 # SOFTWARE.
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20
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21 import os, unittest, tempfile
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22
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23 from roundup.backends.locking import acquire_lock, release_lock
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24
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25 class LockingTest(unittest.TestCase):
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26 def setUp(self):
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27 self.path = tempfile.mktemp()
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28 open(self.path, 'w').write('hi\n')
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29
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30 # XXX test disabled because it simply doesn't work on many platforms
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31 # (Solaris and Irix are known to fail, but Linux works)
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32 def xtest_basics(self):
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33 f = acquire_lock(self.path)
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34 try:
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35 acquire_lock(self.path, block=0)
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36 except:
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37 pass
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38 else:
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39 raise AssertionError('no exception')
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40 release_lock(f)
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41 f = acquire_lock(self.path)
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42 release_lock(f)
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43
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44 def tearDown(self):
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45 os.remove(self.path)
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46
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47 # vim: set filetype=python ts=4 sw=4 et si
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