root / test / ganeti.locking_unittest.py @ 5a9c3f46
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#!/usr/bin/python
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#
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# Copyright (C) 2006, 2007 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 0.0510-1301, USA.
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"""Script for unittesting the locking module"""
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import os |
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import unittest |
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import time |
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import Queue |
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from ganeti import locking |
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from ganeti import errors |
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from threading import Thread |
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# This is used to test the ssynchronize decorator.
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# Since it's passed as input to a decorator it must be declared as a global.
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_decoratorlock = locking.SharedLock() |
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#: List for looping tests
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ITERATIONS = range(8) |
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def _Repeat(fn): |
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"""Decorator for executing a function many times"""
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def wrapper(*args, **kwargs): |
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for i in ITERATIONS: |
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fn(*args, **kwargs) |
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return wrapper
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class _ThreadedTestCase(unittest.TestCase): |
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"""Test class that supports adding/waiting on threads"""
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def setUp(self): |
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unittest.TestCase.setUp(self)
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self.threads = []
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def _addThread(self, *args, **kwargs): |
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"""Create and remember a new thread"""
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t = Thread(*args, **kwargs) |
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self.threads.append(t)
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t.start() |
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return t
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def _waitThreads(self): |
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"""Wait for all our threads to finish"""
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for t in self.threads: |
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t.join(60)
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self.failIf(t.isAlive())
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self.threads = []
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class TestSharedLock(_ThreadedTestCase): |
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"""SharedLock tests"""
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def setUp(self): |
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_ThreadedTestCase.setUp(self)
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self.sl = locking.SharedLock()
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# helper threads use the 'done' queue to tell the master they finished.
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self.done = Queue.Queue(0) |
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def testSequenceAndOwnership(self): |
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self.assert_(not self.sl._is_owned()) |
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self.sl.acquire(shared=1) |
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self.assert_(self.sl._is_owned()) |
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self.assert_(self.sl._is_owned(shared=1)) |
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self.assert_(not self.sl._is_owned(shared=0)) |
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self.sl.release()
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self.assert_(not self.sl._is_owned()) |
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self.sl.acquire()
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self.assert_(self.sl._is_owned()) |
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self.assert_(not self.sl._is_owned(shared=1)) |
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self.assert_(self.sl._is_owned(shared=0)) |
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self.sl.release()
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self.assert_(not self.sl._is_owned()) |
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self.sl.acquire(shared=1) |
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self.assert_(self.sl._is_owned()) |
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self.assert_(self.sl._is_owned(shared=1)) |
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self.assert_(not self.sl._is_owned(shared=0)) |
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self.sl.release()
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self.assert_(not self.sl._is_owned()) |
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def testBooleanValue(self): |
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# semaphores are supposed to return a true value on a successful acquire
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self.assert_(self.sl.acquire(shared=1)) |
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self.sl.release()
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self.assert_(self.sl.acquire()) |
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self.sl.release()
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def testDoubleLockingStoE(self): |
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self.sl.acquire(shared=1) |
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self.assertRaises(AssertionError, self.sl.acquire) |
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def testDoubleLockingEtoS(self): |
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self.sl.acquire()
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self.assertRaises(AssertionError, self.sl.acquire, shared=1) |
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def testDoubleLockingStoS(self): |
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self.sl.acquire(shared=1) |
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self.assertRaises(AssertionError, self.sl.acquire, shared=1) |
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def testDoubleLockingEtoE(self): |
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self.sl.acquire()
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self.assertRaises(AssertionError, self.sl.acquire) |
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# helper functions: called in a separate thread they acquire the lock, send
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# their identifier on the done queue, then release it.
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def _doItSharer(self): |
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try:
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self.sl.acquire(shared=1) |
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self.done.put('SHR') |
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self.sl.release()
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except errors.LockError:
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self.done.put('ERR') |
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def _doItExclusive(self): |
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try:
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self.sl.acquire()
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self.done.put('EXC') |
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self.sl.release()
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except errors.LockError:
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self.done.put('ERR') |
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def _doItDelete(self): |
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try:
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self.sl.delete()
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self.done.put('DEL') |
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except errors.LockError:
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self.done.put('ERR') |
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def testSharersCanCoexist(self): |
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self.sl.acquire(shared=1) |
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Thread(target=self._doItSharer).start()
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self.assert_(self.done.get(True, 1)) |
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self.sl.release()
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@_Repeat
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def testExclusiveBlocksExclusive(self): |
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self.sl.acquire()
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self._addThread(target=self._doItExclusive) |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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self.sl.release()
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self._waitThreads()
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self.failUnlessEqual(self.done.get_nowait(), 'EXC') |
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@_Repeat
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def testExclusiveBlocksDelete(self): |
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self.sl.acquire()
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self._addThread(target=self._doItDelete) |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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self.sl.release()
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self._waitThreads()
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self.failUnlessEqual(self.done.get_nowait(), 'DEL') |
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self.sl = locking.SharedLock()
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@_Repeat
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def testExclusiveBlocksSharer(self): |
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self.sl.acquire()
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self._addThread(target=self._doItSharer) |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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self.sl.release()
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self._waitThreads()
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self.failUnlessEqual(self.done.get_nowait(), 'SHR') |
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@_Repeat
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def testSharerBlocksExclusive(self): |
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self.sl.acquire(shared=1) |
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self._addThread(target=self._doItExclusive) |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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self.sl.release()
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self._waitThreads()
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self.failUnlessEqual(self.done.get_nowait(), 'EXC') |
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@_Repeat
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def testSharerBlocksDelete(self): |
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self.sl.acquire(shared=1) |
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self._addThread(target=self._doItDelete) |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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self.sl.release()
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self._waitThreads()
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self.failUnlessEqual(self.done.get_nowait(), 'DEL') |
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self.sl = locking.SharedLock()
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@_Repeat
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def testWaitingExclusiveBlocksSharer(self): |
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"""SKIPPED testWaitingExclusiveBlockSharer"""
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return
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self.sl.acquire(shared=1) |
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# the lock is acquired in shared mode...
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self._addThread(target=self._doItExclusive) |
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# ...but now an exclusive is waiting...
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self._addThread(target=self._doItSharer) |
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# ...so the sharer should be blocked as well
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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self.sl.release()
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self._waitThreads()
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# The exclusive passed before
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self.failUnlessEqual(self.done.get_nowait(), 'EXC') |
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self.failUnlessEqual(self.done.get_nowait(), 'SHR') |
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@_Repeat
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def testWaitingSharerBlocksExclusive(self): |
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"""SKIPPED testWaitingSharerBlocksExclusive"""
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return
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self.sl.acquire()
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# the lock is acquired in exclusive mode...
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self._addThread(target=self._doItSharer) |
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# ...but now a sharer is waiting...
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self._addThread(target=self._doItExclusive) |
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# ...the exclusive is waiting too...
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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self.sl.release()
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self._waitThreads()
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# The sharer passed before
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self.assertEqual(self.done.get_nowait(), 'SHR') |
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self.assertEqual(self.done.get_nowait(), 'EXC') |
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def testNoNonBlocking(self): |
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self.assertRaises(NotImplementedError, self.sl.acquire, blocking=0) |
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self.assertRaises(NotImplementedError, self.sl.delete, blocking=0) |
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self.sl.acquire()
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self.sl.delete(blocking=0) # Fine, because the lock is already acquired |
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def testDelete(self): |
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self.sl.delete()
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self.assertRaises(errors.LockError, self.sl.acquire) |
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self.assertRaises(errors.LockError, self.sl.acquire, shared=1) |
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self.assertRaises(errors.LockError, self.sl.delete) |
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def testNoDeleteIfSharer(self): |
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self.sl.acquire(shared=1) |
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self.assertRaises(AssertionError, self.sl.delete) |
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@_Repeat
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def testDeletePendingSharersExclusiveDelete(self): |
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self.sl.acquire()
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self._addThread(target=self._doItSharer) |
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self._addThread(target=self._doItSharer) |
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self._addThread(target=self._doItExclusive) |
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self._addThread(target=self._doItDelete) |
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self.sl.delete()
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self._waitThreads()
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# The threads who were pending return ERR
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for _ in range(4): |
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self.assertEqual(self.done.get_nowait(), 'ERR') |
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self.sl = locking.SharedLock()
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@_Repeat
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def testDeletePendingDeleteExclusiveSharers(self): |
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self.sl.acquire()
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self._addThread(target=self._doItDelete) |
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self._addThread(target=self._doItExclusive) |
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self._addThread(target=self._doItSharer) |
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self._addThread(target=self._doItSharer) |
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self.sl.delete()
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self._waitThreads()
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# The two threads who were pending return both ERR
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self.assertEqual(self.done.get_nowait(), 'ERR') |
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self.assertEqual(self.done.get_nowait(), 'ERR') |
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self.assertEqual(self.done.get_nowait(), 'ERR') |
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self.assertEqual(self.done.get_nowait(), 'ERR') |
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self.sl = locking.SharedLock()
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class TestSSynchronizedDecorator(_ThreadedTestCase): |
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"""Shared Lock Synchronized decorator test"""
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def setUp(self): |
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_ThreadedTestCase.setUp(self)
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# helper threads use the 'done' queue to tell the master they finished.
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self.done = Queue.Queue(0) |
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@locking.ssynchronized(_decoratorlock)
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def _doItExclusive(self): |
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self.assert_(_decoratorlock._is_owned())
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self.done.put('EXC') |
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@locking.ssynchronized(_decoratorlock, shared=1) |
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def _doItSharer(self): |
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self.assert_(_decoratorlock._is_owned(shared=1)) |
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self.done.put('SHR') |
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def testDecoratedFunctions(self): |
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self._doItExclusive()
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self.assert_(not _decoratorlock._is_owned()) |
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self._doItSharer()
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self.assert_(not _decoratorlock._is_owned()) |
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def testSharersCanCoexist(self): |
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_decoratorlock.acquire(shared=1)
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Thread(target=self._doItSharer).start()
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self.assert_(self.done.get(True, 1)) |
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_decoratorlock.release() |
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@_Repeat
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def testExclusiveBlocksExclusive(self): |
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_decoratorlock.acquire() |
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self._addThread(target=self._doItExclusive) |
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# give it a bit of time to check that it's not actually doing anything
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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_decoratorlock.release() |
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self._waitThreads()
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self.failUnlessEqual(self.done.get_nowait(), 'EXC') |
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@_Repeat
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def testExclusiveBlocksSharer(self): |
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_decoratorlock.acquire() |
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self._addThread(target=self._doItSharer) |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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_decoratorlock.release() |
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self._waitThreads()
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self.failUnlessEqual(self.done.get_nowait(), 'SHR') |
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@_Repeat
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def testSharerBlocksExclusive(self): |
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_decoratorlock.acquire(shared=1)
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self._addThread(target=self._doItExclusive) |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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_decoratorlock.release() |
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self._waitThreads()
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self.failUnlessEqual(self.done.get_nowait(), 'EXC') |
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class TestLockSet(_ThreadedTestCase): |
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"""LockSet tests"""
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def setUp(self): |
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_ThreadedTestCase.setUp(self)
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self._setUpLS()
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# helper threads use the 'done' queue to tell the master they finished.
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self.done = Queue.Queue(0) |
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def _setUpLS(self): |
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"""Helper to (re)initialize the lock set"""
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self.resources = ['one', 'two', 'three'] |
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self.ls = locking.LockSet(members=self.resources) |
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def testResources(self): |
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self.assertEquals(self.ls._names(), set(self.resources)) |
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newls = locking.LockSet() |
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self.assertEquals(newls._names(), set()) |
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def testAcquireRelease(self): |
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self.assert_(self.ls.acquire('one')) |
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self.assertEquals(self.ls._list_owned(), set(['one'])) |
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self.ls.release()
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self.assertEquals(self.ls._list_owned(), set()) |
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self.assertEquals(self.ls.acquire(['one']), set(['one'])) |
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self.assertEquals(self.ls._list_owned(), set(['one'])) |
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self.ls.release()
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self.assertEquals(self.ls._list_owned(), set()) |
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self.ls.acquire(['one', 'two', 'three']) |
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self.assertEquals(self.ls._list_owned(), set(['one', 'two', 'three'])) |
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self.ls.release('one') |
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self.assertEquals(self.ls._list_owned(), set(['two', 'three'])) |
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self.ls.release(['three']) |
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self.assertEquals(self.ls._list_owned(), set(['two'])) |
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self.ls.release()
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self.assertEquals(self.ls._list_owned(), set()) |
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self.assertEquals(self.ls.acquire(['one', 'three']), set(['one', 'three'])) |
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self.assertEquals(self.ls._list_owned(), set(['one', 'three'])) |
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self.ls.release()
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self.assertEquals(self.ls._list_owned(), set()) |
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def testNoDoubleAcquire(self): |
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self.ls.acquire('one') |
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self.assertRaises(AssertionError, self.ls.acquire, 'one') |
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self.assertRaises(AssertionError, self.ls.acquire, ['two']) |
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self.assertRaises(AssertionError, self.ls.acquire, ['two', 'three']) |
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self.ls.release()
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self.ls.acquire(['one', 'three']) |
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self.ls.release('one') |
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self.assertRaises(AssertionError, self.ls.acquire, ['two']) |
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self.ls.release('three') |
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def testNoWrongRelease(self): |
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self.assertRaises(AssertionError, self.ls.release) |
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self.ls.acquire('one') |
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self.assertRaises(AssertionError, self.ls.release, 'two') |
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def testAddRemove(self): |
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self.ls.add('four') |
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self.assertEquals(self.ls._list_owned(), set()) |
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self.assert_('four' in self.ls._names()) |
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self.ls.add(['five', 'six', 'seven'], acquired=1) |
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self.assert_('five' in self.ls._names()) |
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self.assert_('six' in self.ls._names()) |
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self.assert_('seven' in self.ls._names()) |
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self.assertEquals(self.ls._list_owned(), set(['five', 'six', 'seven'])) |
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self.assertEquals(self.ls.remove(['five', 'six']), ['five', 'six']) |
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self.assert_('five' not in self.ls._names()) |
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self.assert_('six' not in self.ls._names()) |
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self.assertEquals(self.ls._list_owned(), set(['seven'])) |
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self.assertRaises(AssertionError, self.ls.add, 'eight', acquired=1) |
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self.ls.remove('seven') |
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self.assert_('seven' not in self.ls._names()) |
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self.assertEquals(self.ls._list_owned(), set([])) |
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self.ls.acquire(None, shared=1) |
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self.assertRaises(AssertionError, self.ls.add, 'eight') |
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self.ls.release()
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self.ls.acquire(None) |
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self.ls.add('eight', acquired=1) |
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self.assert_('eight' in self.ls._names()) |
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self.assert_('eight' in self.ls._list_owned()) |
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self.ls.add('nine') |
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self.assert_('nine' in self.ls._names()) |
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self.assert_('nine' not in self.ls._list_owned()) |
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self.ls.release()
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self.ls.remove(['two']) |
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self.assert_('two' not in self.ls._names()) |
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self.ls.acquire('three') |
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self.assertEquals(self.ls.remove(['three']), ['three']) |
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self.assert_('three' not in self.ls._names()) |
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self.assertEquals(self.ls.remove('three'), []) |
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self.assertEquals(self.ls.remove(['one', 'three', 'six']), ['one']) |
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self.assert_('one' not in self.ls._names()) |
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def testRemoveNonBlocking(self): |
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self.assertRaises(NotImplementedError, self.ls.remove, 'one', blocking=0) |
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self.ls.acquire('one') |
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self.assertEquals(self.ls.remove('one', blocking=0), ['one']) |
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self.ls.acquire(['two', 'three']) |
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self.assertEquals(self.ls.remove(['two', 'three'], blocking=0), |
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['two', 'three']) |
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|
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def testNoDoubleAdd(self): |
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self.assertRaises(errors.LockError, self.ls.add, 'two') |
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self.ls.add('four') |
| 449 |
self.assertRaises(errors.LockError, self.ls.add, 'four') |
| 450 |
|
| 451 |
def testNoWrongRemoves(self): |
| 452 |
self.ls.acquire(['one', 'three'], shared=1) |
| 453 |
# Cannot remove 'two' while holding something which is not a superset
|
| 454 |
self.assertRaises(AssertionError, self.ls.remove, 'two') |
| 455 |
# Cannot remove 'three' as we are sharing it
|
| 456 |
self.assertRaises(AssertionError, self.ls.remove, 'three') |
| 457 |
|
| 458 |
def testAcquireSetLock(self): |
| 459 |
# acquire the set-lock exclusively
|
| 460 |
self.assertEquals(self.ls.acquire(None), set(['one', 'two', 'three'])) |
| 461 |
self.assertEquals(self.ls._list_owned(), set(['one', 'two', 'three'])) |
| 462 |
self.assertEquals(self.ls._is_owned(), True) |
| 463 |
self.assertEquals(self.ls._names(), set(['one', 'two', 'three'])) |
| 464 |
# I can still add/remove elements...
|
| 465 |
self.assertEquals(self.ls.remove(['two', 'three']), ['two', 'three']) |
| 466 |
self.assert_(self.ls.add('six')) |
| 467 |
self.ls.release()
|
| 468 |
# share the set-lock
|
| 469 |
self.assertEquals(self.ls.acquire(None, shared=1), set(['one', 'six'])) |
| 470 |
# adding new elements is not possible
|
| 471 |
self.assertRaises(AssertionError, self.ls.add, 'five') |
| 472 |
self.ls.release()
|
| 473 |
|
| 474 |
def testAcquireWithRepetitions(self): |
| 475 |
self.assertEquals(self.ls.acquire(['two', 'two', 'three'], shared=1), |
| 476 |
set(['two', 'two', 'three'])) |
| 477 |
self.ls.release(['two', 'two']) |
| 478 |
self.assertEquals(self.ls._list_owned(), set(['three'])) |
| 479 |
|
| 480 |
def testEmptyAcquire(self): |
| 481 |
# Acquire an empty list of locks...
|
| 482 |
self.assertEquals(self.ls.acquire([]), set()) |
| 483 |
self.assertEquals(self.ls._list_owned(), set()) |
| 484 |
# New locks can still be addded
|
| 485 |
self.assert_(self.ls.add('six')) |
| 486 |
# "re-acquiring" is not an issue, since we had really acquired nothing
|
| 487 |
self.assertEquals(self.ls.acquire([], shared=1), set()) |
| 488 |
self.assertEquals(self.ls._list_owned(), set()) |
| 489 |
# We haven't really acquired anything, so we cannot release
|
| 490 |
self.assertRaises(AssertionError, self.ls.release) |
| 491 |
|
| 492 |
def _doLockSet(self, set, shared): |
| 493 |
try:
|
| 494 |
self.ls.acquire(set, shared=shared) |
| 495 |
self.done.put('DONE') |
| 496 |
self.ls.release()
|
| 497 |
except errors.LockError:
|
| 498 |
self.done.put('ERR') |
| 499 |
|
| 500 |
def _doAddSet(self, set): |
| 501 |
try:
|
| 502 |
self.ls.add(set, acquired=1) |
| 503 |
self.done.put('DONE') |
| 504 |
self.ls.release()
|
| 505 |
except errors.LockError:
|
| 506 |
self.done.put('ERR') |
| 507 |
|
| 508 |
def _doRemoveSet(self, set): |
| 509 |
self.done.put(self.ls.remove(set)) |
| 510 |
|
| 511 |
@_Repeat
|
| 512 |
def testConcurrentSharedAcquire(self): |
| 513 |
self.ls.acquire(['one', 'two'], shared=1) |
| 514 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 1)) |
| 515 |
self._waitThreads()
|
| 516 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 517 |
self._addThread(target=self._doLockSet, args=(['one', 'two', 'three'], 1)) |
| 518 |
self._waitThreads()
|
| 519 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 520 |
self._addThread(target=self._doLockSet, args=('three', 1)) |
| 521 |
self._waitThreads()
|
| 522 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 523 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 0)) |
| 524 |
self._addThread(target=self._doLockSet, args=(['two', 'three'], 0)) |
| 525 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 526 |
self.ls.release()
|
| 527 |
self._waitThreads()
|
| 528 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 529 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 530 |
|
| 531 |
@_Repeat
|
| 532 |
def testConcurrentExclusiveAcquire(self): |
| 533 |
self.ls.acquire(['one', 'two']) |
| 534 |
self._addThread(target=self._doLockSet, args=('three', 1)) |
| 535 |
self._waitThreads()
|
| 536 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 537 |
self._addThread(target=self._doLockSet, args=('three', 0)) |
| 538 |
self._waitThreads()
|
| 539 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 540 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 0)) |
| 541 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 1)) |
| 542 |
self._addThread(target=self._doLockSet, args=('one', 0)) |
| 543 |
self._addThread(target=self._doLockSet, args=('one', 1)) |
| 544 |
self._addThread(target=self._doLockSet, args=(['two', 'three'], 0)) |
| 545 |
self._addThread(target=self._doLockSet, args=(['two', 'three'], 1)) |
| 546 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 547 |
self.ls.release()
|
| 548 |
self._waitThreads()
|
| 549 |
for _ in range(6): |
| 550 |
self.failUnlessEqual(self.done.get_nowait(), 'DONE') |
| 551 |
|
| 552 |
@_Repeat
|
| 553 |
def testConcurrentRemove(self): |
| 554 |
self.ls.add('four') |
| 555 |
self.ls.acquire(['one', 'two', 'four']) |
| 556 |
self._addThread(target=self._doLockSet, args=(['one', 'four'], 0)) |
| 557 |
self._addThread(target=self._doLockSet, args=(['one', 'four'], 1)) |
| 558 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 0)) |
| 559 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 1)) |
| 560 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 561 |
self.ls.remove('one') |
| 562 |
self.ls.release()
|
| 563 |
self._waitThreads()
|
| 564 |
for i in range(4): |
| 565 |
self.failUnlessEqual(self.done.get_nowait(), 'ERR') |
| 566 |
self.ls.add(['five', 'six'], acquired=1) |
| 567 |
self._addThread(target=self._doLockSet, args=(['three', 'six'], 1)) |
| 568 |
self._addThread(target=self._doLockSet, args=(['three', 'six'], 0)) |
| 569 |
self._addThread(target=self._doLockSet, args=(['four', 'six'], 1)) |
| 570 |
self._addThread(target=self._doLockSet, args=(['four', 'six'], 0)) |
| 571 |
self.ls.remove('five') |
| 572 |
self.ls.release()
|
| 573 |
self._waitThreads()
|
| 574 |
for i in range(4): |
| 575 |
self.failUnlessEqual(self.done.get_nowait(), 'DONE') |
| 576 |
self.ls.acquire(['three', 'four']) |
| 577 |
self._addThread(target=self._doRemoveSet, args=(['four', 'six'], )) |
| 578 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 579 |
self.ls.remove('four') |
| 580 |
self._waitThreads()
|
| 581 |
self.assertEqual(self.done.get_nowait(), ['six']) |
| 582 |
self._addThread(target=self._doRemoveSet, args=(['two'])) |
| 583 |
self._waitThreads()
|
| 584 |
self.assertEqual(self.done.get_nowait(), ['two']) |
| 585 |
self.ls.release()
|
| 586 |
# reset lockset
|
| 587 |
self._setUpLS()
|
| 588 |
|
| 589 |
@_Repeat
|
| 590 |
def testConcurrentSharedSetLock(self): |
| 591 |
# share the set-lock...
|
| 592 |
self.ls.acquire(None, shared=1) |
| 593 |
# ...another thread can share it too
|
| 594 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 595 |
self._waitThreads()
|
| 596 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 597 |
# ...or just share some elements
|
| 598 |
self._addThread(target=self._doLockSet, args=(['one', 'three'], 1)) |
| 599 |
self._waitThreads()
|
| 600 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 601 |
# ...but not add new ones or remove any
|
| 602 |
t = self._addThread(target=self._doAddSet, args=(['nine'])) |
| 603 |
self._addThread(target=self._doRemoveSet, args=(['two'], )) |
| 604 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 605 |
# this just releases the set-lock
|
| 606 |
self.ls.release([])
|
| 607 |
t.join(60)
|
| 608 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 609 |
# release the lock on the actual elements so remove() can proceed too
|
| 610 |
self.ls.release()
|
| 611 |
self._waitThreads()
|
| 612 |
self.failUnlessEqual(self.done.get_nowait(), ['two']) |
| 613 |
# reset lockset
|
| 614 |
self._setUpLS()
|
| 615 |
|
| 616 |
@_Repeat
|
| 617 |
def testConcurrentExclusiveSetLock(self): |
| 618 |
# acquire the set-lock...
|
| 619 |
self.ls.acquire(None, shared=0) |
| 620 |
# ...no one can do anything else
|
| 621 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 622 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
| 623 |
self._addThread(target=self._doLockSet, args=(['three'], 0)) |
| 624 |
self._addThread(target=self._doLockSet, args=(['two'], 1)) |
| 625 |
self._addThread(target=self._doAddSet, args=(['nine'])) |
| 626 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 627 |
self.ls.release()
|
| 628 |
self._waitThreads()
|
| 629 |
for _ in range(5): |
| 630 |
self.assertEqual(self.done.get(True, 1), 'DONE') |
| 631 |
# cleanup
|
| 632 |
self._setUpLS()
|
| 633 |
|
| 634 |
@_Repeat
|
| 635 |
def testConcurrentSetLockAdd(self): |
| 636 |
self.ls.acquire('one') |
| 637 |
# Another thread wants the whole SetLock
|
| 638 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
| 639 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 640 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 641 |
self.assertRaises(AssertionError, self.ls.add, 'four') |
| 642 |
self.ls.release()
|
| 643 |
self._waitThreads()
|
| 644 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 645 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 646 |
self.ls.acquire(None) |
| 647 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
| 648 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 649 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 650 |
self.ls.add('four') |
| 651 |
self.ls.add('five', acquired=1) |
| 652 |
self.ls.add('six', acquired=1, shared=1) |
| 653 |
self.assertEquals(self.ls._list_owned(), |
| 654 |
set(['one', 'two', 'three', 'five', 'six'])) |
| 655 |
self.assertEquals(self.ls._is_owned(), True) |
| 656 |
self.assertEquals(self.ls._names(), |
| 657 |
set(['one', 'two', 'three', 'four', 'five', 'six'])) |
| 658 |
self.ls.release()
|
| 659 |
self._waitThreads()
|
| 660 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 661 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 662 |
self._setUpLS()
|
| 663 |
|
| 664 |
@_Repeat
|
| 665 |
def testEmptyLockSet(self): |
| 666 |
# get the set-lock
|
| 667 |
self.assertEqual(self.ls.acquire(None), set(['one', 'two', 'three'])) |
| 668 |
# now empty it...
|
| 669 |
self.ls.remove(['one', 'two', 'three']) |
| 670 |
# and adds/locks by another thread still wait
|
| 671 |
self._addThread(target=self._doAddSet, args=(['nine'])) |
| 672 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 673 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
| 674 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 675 |
self.ls.release()
|
| 676 |
self._waitThreads()
|
| 677 |
for _ in range(3): |
| 678 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 679 |
# empty it again...
|
| 680 |
self.assertEqual(self.ls.remove(['nine']), ['nine']) |
| 681 |
# now share it...
|
| 682 |
self.assertEqual(self.ls.acquire(None, shared=1), set()) |
| 683 |
# other sharers can go, adds still wait
|
| 684 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 685 |
self._waitThreads()
|
| 686 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 687 |
self._addThread(target=self._doAddSet, args=(['nine'])) |
| 688 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 689 |
self.ls.release()
|
| 690 |
self._waitThreads()
|
| 691 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 692 |
self._setUpLS()
|
| 693 |
|
| 694 |
|
| 695 |
class TestGanetiLockManager(_ThreadedTestCase): |
| 696 |
|
| 697 |
def setUp(self): |
| 698 |
_ThreadedTestCase.setUp(self)
|
| 699 |
self.nodes=['n1', 'n2'] |
| 700 |
self.instances=['i1', 'i2', 'i3'] |
| 701 |
self.GL = locking.GanetiLockManager(nodes=self.nodes, |
| 702 |
instances=self.instances)
|
| 703 |
self.done = Queue.Queue(0) |
| 704 |
|
| 705 |
def tearDown(self): |
| 706 |
# Don't try this at home...
|
| 707 |
locking.GanetiLockManager._instance = None
|
| 708 |
|
| 709 |
def testLockingConstants(self): |
| 710 |
# The locking library internally cheats by assuming its constants have some
|
| 711 |
# relationships with each other. Check those hold true.
|
| 712 |
# This relationship is also used in the Processor to recursively acquire
|
| 713 |
# the right locks. Again, please don't break it.
|
| 714 |
for i in range(len(locking.LEVELS)): |
| 715 |
self.assertEqual(i, locking.LEVELS[i])
|
| 716 |
|
| 717 |
def testDoubleGLFails(self): |
| 718 |
self.assertRaises(AssertionError, locking.GanetiLockManager) |
| 719 |
|
| 720 |
def testLockNames(self): |
| 721 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
| 722 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set(self.nodes)) |
| 723 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), |
| 724 |
set(self.instances)) |
| 725 |
|
| 726 |
def testInitAndResources(self): |
| 727 |
locking.GanetiLockManager._instance = None
|
| 728 |
self.GL = locking.GanetiLockManager()
|
| 729 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
| 730 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set()) |
| 731 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), set()) |
| 732 |
|
| 733 |
locking.GanetiLockManager._instance = None
|
| 734 |
self.GL = locking.GanetiLockManager(nodes=self.nodes) |
| 735 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
| 736 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set(self.nodes)) |
| 737 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), set()) |
| 738 |
|
| 739 |
locking.GanetiLockManager._instance = None
|
| 740 |
self.GL = locking.GanetiLockManager(instances=self.instances) |
| 741 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
| 742 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set()) |
| 743 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), |
| 744 |
set(self.instances)) |
| 745 |
|
| 746 |
def testAcquireRelease(self): |
| 747 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 748 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_CLUSTER), set(['BGL'])) |
| 749 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i1']) |
| 750 |
self.GL.acquire(locking.LEVEL_NODE, ['n1', 'n2'], shared=1) |
| 751 |
self.GL.release(locking.LEVEL_NODE, ['n2']) |
| 752 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), set(['n1'])) |
| 753 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), set(['i1'])) |
| 754 |
self.GL.release(locking.LEVEL_NODE)
|
| 755 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), set()) |
| 756 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), set(['i1'])) |
| 757 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 758 |
self.assertRaises(errors.LockError, self.GL.acquire, |
| 759 |
locking.LEVEL_INSTANCE, ['i5'])
|
| 760 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i3'], shared=1) |
| 761 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), set(['i3'])) |
| 762 |
|
| 763 |
def testAcquireWholeSets(self): |
| 764 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 765 |
self.assertEquals(self.GL.acquire(locking.LEVEL_INSTANCE, None), |
| 766 |
set(self.instances)) |
| 767 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), |
| 768 |
set(self.instances)) |
| 769 |
self.assertEquals(self.GL.acquire(locking.LEVEL_NODE, None, shared=1), |
| 770 |
set(self.nodes)) |
| 771 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), |
| 772 |
set(self.nodes)) |
| 773 |
self.GL.release(locking.LEVEL_NODE)
|
| 774 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 775 |
self.GL.release(locking.LEVEL_CLUSTER)
|
| 776 |
|
| 777 |
def testAcquireWholeAndPartial(self): |
| 778 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 779 |
self.assertEquals(self.GL.acquire(locking.LEVEL_INSTANCE, None), |
| 780 |
set(self.instances)) |
| 781 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), |
| 782 |
set(self.instances)) |
| 783 |
self.assertEquals(self.GL.acquire(locking.LEVEL_NODE, ['n2'], shared=1), |
| 784 |
set(['n2'])) |
| 785 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), |
| 786 |
set(['n2'])) |
| 787 |
self.GL.release(locking.LEVEL_NODE)
|
| 788 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 789 |
self.GL.release(locking.LEVEL_CLUSTER)
|
| 790 |
|
| 791 |
def testBGLDependency(self): |
| 792 |
self.assertRaises(AssertionError, self.GL.acquire, |
| 793 |
locking.LEVEL_NODE, ['n1', 'n2']) |
| 794 |
self.assertRaises(AssertionError, self.GL.acquire, |
| 795 |
locking.LEVEL_INSTANCE, ['i3'])
|
| 796 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 797 |
self.GL.acquire(locking.LEVEL_NODE, ['n1']) |
| 798 |
self.assertRaises(AssertionError, self.GL.release, |
| 799 |
locking.LEVEL_CLUSTER, ['BGL'])
|
| 800 |
self.assertRaises(AssertionError, self.GL.release, |
| 801 |
locking.LEVEL_CLUSTER) |
| 802 |
self.GL.release(locking.LEVEL_NODE)
|
| 803 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i1', 'i2']) |
| 804 |
self.assertRaises(AssertionError, self.GL.release, |
| 805 |
locking.LEVEL_CLUSTER, ['BGL'])
|
| 806 |
self.assertRaises(AssertionError, self.GL.release, |
| 807 |
locking.LEVEL_CLUSTER) |
| 808 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 809 |
|
| 810 |
def testWrongOrder(self): |
| 811 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 812 |
self.GL.acquire(locking.LEVEL_NODE, ['n2']) |
| 813 |
self.assertRaises(AssertionError, self.GL.acquire, |
| 814 |
locking.LEVEL_NODE, ['n1'])
|
| 815 |
self.assertRaises(AssertionError, self.GL.acquire, |
| 816 |
locking.LEVEL_INSTANCE, ['i2'])
|
| 817 |
|
| 818 |
# Helper function to run as a thread that shared the BGL and then acquires
|
| 819 |
# some locks at another level.
|
| 820 |
def _doLock(self, level, names, shared): |
| 821 |
try:
|
| 822 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 823 |
self.GL.acquire(level, names, shared=shared)
|
| 824 |
self.done.put('DONE') |
| 825 |
self.GL.release(level)
|
| 826 |
self.GL.release(locking.LEVEL_CLUSTER)
|
| 827 |
except errors.LockError:
|
| 828 |
self.done.put('ERR') |
| 829 |
|
| 830 |
@_Repeat
|
| 831 |
def testConcurrency(self): |
| 832 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 833 |
self._addThread(target=self._doLock, |
| 834 |
args=(locking.LEVEL_INSTANCE, 'i1', 1)) |
| 835 |
self._waitThreads()
|
| 836 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 837 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i3']) |
| 838 |
self._addThread(target=self._doLock, |
| 839 |
args=(locking.LEVEL_INSTANCE, 'i1', 1)) |
| 840 |
self._waitThreads()
|
| 841 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 842 |
self._addThread(target=self._doLock, |
| 843 |
args=(locking.LEVEL_INSTANCE, 'i3', 1)) |
| 844 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 845 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 846 |
self._waitThreads()
|
| 847 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 848 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i2'], shared=1) |
| 849 |
self._addThread(target=self._doLock, |
| 850 |
args=(locking.LEVEL_INSTANCE, 'i2', 1)) |
| 851 |
self._waitThreads()
|
| 852 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 853 |
self._addThread(target=self._doLock, |
| 854 |
args=(locking.LEVEL_INSTANCE, 'i2', 0)) |
| 855 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 856 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 857 |
self._waitThreads()
|
| 858 |
self.assertEqual(self.done.get(True, 1), 'DONE') |
| 859 |
self.GL.release(locking.LEVEL_CLUSTER, ['BGL']) |
| 860 |
|
| 861 |
|
| 862 |
if __name__ == '__main__': |
| 863 |
unittest.main() |
| 864 |
#suite = unittest.TestLoader().loadTestsFromTestCase(TestSharedLock)
|
| 865 |
#unittest.TextTestRunner(verbosity=2).run(suite)
|