root / test / ganeti.locking_unittest.py @ 6760e4ed
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#!/usr/bin/python
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#
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# Copyright (C) 2006, 2007, 2010 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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import threading |
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import random |
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from ganeti import locking |
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from ganeti import errors |
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from ganeti import utils |
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import testutils |
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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("decorator lock")
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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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def SafeSleep(duration): |
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start = time.time() |
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while True: |
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delay = start + duration - time.time() |
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if delay <= 0.0: |
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break
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time.sleep(delay) |
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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.done = Queue.Queue(0) |
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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 = threading.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 _ConditionTestCase(_ThreadedTestCase): |
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"""Common test case for conditions"""
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def setUp(self, cls): |
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_ThreadedTestCase.setUp(self)
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self.lock = threading.Lock()
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self.cond = cls(self.lock) |
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def _testAcquireRelease(self): |
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self.assertFalse(self.cond._is_owned()) |
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self.assertRaises(RuntimeError, self.cond.wait) |
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self.assertRaises(RuntimeError, self.cond.notifyAll) |
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self.cond.acquire()
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self.assert_(self.cond._is_owned()) |
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self.cond.notifyAll()
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self.assert_(self.cond._is_owned()) |
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self.cond.release()
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self.assertFalse(self.cond._is_owned()) |
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self.assertRaises(RuntimeError, self.cond.wait) |
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self.assertRaises(RuntimeError, self.cond.notifyAll) |
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def _testNotification(self): |
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def _NotifyAll(): |
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self.done.put("NE") |
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self.cond.acquire()
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self.done.put("NA") |
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self.cond.notifyAll()
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self.done.put("NN") |
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self.cond.release()
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self.cond.acquire()
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self._addThread(target=_NotifyAll)
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self.assertEqual(self.done.get(True, 1), "NE") |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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self.cond.wait()
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self.assertEqual(self.done.get(True, 1), "NA") |
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self.assertEqual(self.done.get(True, 1), "NN") |
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self.assert_(self.cond._is_owned()) |
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self.cond.release()
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self.assertFalse(self.cond._is_owned()) |
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class TestSingleNotifyPipeCondition(_ConditionTestCase): |
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"""SingleNotifyPipeCondition tests"""
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def setUp(self): |
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_ConditionTestCase.setUp(self, locking.SingleNotifyPipeCondition)
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def testAcquireRelease(self): |
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self._testAcquireRelease()
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def testNotification(self): |
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self._testNotification()
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def testWaitReuse(self): |
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self.cond.acquire()
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self.cond.wait(0) |
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self.cond.wait(0.1) |
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self.cond.release()
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def testNoNotifyReuse(self): |
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self.cond.acquire()
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self.cond.notifyAll()
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self.assertRaises(RuntimeError, self.cond.wait) |
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self.assertRaises(RuntimeError, self.cond.notifyAll) |
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self.cond.release()
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class TestPipeCondition(_ConditionTestCase): |
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"""PipeCondition tests"""
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def setUp(self): |
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_ConditionTestCase.setUp(self, locking.PipeCondition)
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def testAcquireRelease(self): |
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self._testAcquireRelease()
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def testNotification(self): |
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self._testNotification()
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def _TestWait(self, fn): |
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threads = [ |
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self._addThread(target=fn),
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self._addThread(target=fn),
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self._addThread(target=fn),
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] |
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# Wait for threads to be waiting
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for _ in threads: |
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self.assertEqual(self.done.get(True, 1), "A") |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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self.cond.acquire()
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self.assertEqual(len(self.cond._waiters), 3) |
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self.assertEqual(self.cond._waiters, set(threads)) |
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# This new thread can't acquire the lock, and thus call wait, before we
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# release it
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self._addThread(target=fn)
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self.cond.notifyAll()
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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self.cond.release()
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# We should now get 3 W and 1 A (for the new thread) in whatever order
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w = 0
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a = 0
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for i in range(4): |
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got = self.done.get(True, 1) |
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if got == "W": |
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w += 1
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elif got == "A": |
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a += 1
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else:
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self.fail("Got %s on the done queue" % got) |
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self.assertEqual(w, 3) |
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self.assertEqual(a, 1) |
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self.cond.acquire()
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self.cond.notifyAll()
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self.cond.release()
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self._waitThreads()
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self.assertEqual(self.done.get_nowait(), "W") |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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def testBlockingWait(self): |
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def _BlockingWait(): |
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self.cond.acquire()
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self.done.put("A") |
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self.cond.wait()
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self.cond.release()
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self.done.put("W") |
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self._TestWait(_BlockingWait)
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def testLongTimeoutWait(self): |
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def _Helper(): |
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self.cond.acquire()
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self.done.put("A") |
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self.cond.wait(15.0) |
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self.cond.release()
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self.done.put("W") |
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self._TestWait(_Helper)
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def _TimeoutWait(self, timeout, check): |
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self.cond.acquire()
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self.cond.wait(timeout)
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self.cond.release()
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self.done.put(check)
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def testShortTimeoutWait(self): |
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self._addThread(target=self._TimeoutWait, args=(0.1, "T1")) |
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self._addThread(target=self._TimeoutWait, args=(0.1, "T1")) |
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self._waitThreads()
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self.assertEqual(self.done.get_nowait(), "T1") |
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self.assertEqual(self.done.get_nowait(), "T1") |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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def testZeroTimeoutWait(self): |
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self._addThread(target=self._TimeoutWait, args=(0, "T0")) |
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self._addThread(target=self._TimeoutWait, args=(0, "T0")) |
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self._addThread(target=self._TimeoutWait, args=(0, "T0")) |
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self._waitThreads()
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self.assertEqual(self.done.get_nowait(), "T0") |
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self.assertEqual(self.done.get_nowait(), "T0") |
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self.assertEqual(self.done.get_nowait(), "T0") |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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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("TestSharedLock") |
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def testSequenceAndOwnership(self): |
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self.assertFalse(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.assertFalse(self.sl._is_owned(shared=0)) |
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self.sl.release()
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self.assertFalse(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.assertFalse(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.assertFalse(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.assertFalse(self.sl._is_owned(shared=0)) |
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self.sl.release()
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self.assertFalse(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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threading.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(self.sl.name) |
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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(self.sl.name) |
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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 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 testDeleteTimeout(self): |
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self.sl.delete(timeout=60) |
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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(self.sl.name) |
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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(self.sl.name) |
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@_Repeat
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def testExclusiveAcquireTimeout(self): |
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for shared in [0, 1]: |
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on_queue = threading.Event() |
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release_exclusive = threading.Event() |
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def _LockExclusive(): |
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self.sl.acquire(shared=0, test_notify=on_queue.set) |
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self.done.put("A: start wait") |
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release_exclusive.wait() |
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self.done.put("A: end wait") |
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self.sl.release()
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# Start thread to hold lock in exclusive mode
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self._addThread(target=_LockExclusive)
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# Wait for wait to begin
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self.assertEqual(self.done.get(timeout=60), "A: start wait") |
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# Wait up to 60s to get lock, but release exclusive lock as soon as we're
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# on the queue
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self.failUnless(self.sl.acquire(shared=shared, timeout=60, |
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test_notify=release_exclusive.set)) |
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self.done.put("got 2nd") |
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self.sl.release()
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self._waitThreads()
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self.assertEqual(self.done.get_nowait(), "A: end wait") |
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self.assertEqual(self.done.get_nowait(), "got 2nd") |
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self.assertRaises(Queue.Empty, self.done.get_nowait) |
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@_Repeat
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def testAcquireExpiringTimeout(self): |
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def _AcquireWithTimeout(shared, timeout): |
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if not self.sl.acquire(shared=shared, timeout=timeout): |
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self.done.put("timeout") |
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for shared in [0, 1]: |
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# Lock exclusively
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self.sl.acquire()
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# Start shared acquires with timeout between 0 and 20 ms
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for i in range(11): |
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self._addThread(target=_AcquireWithTimeout,
|
512 |
args=(shared, i * 2.0 / 1000.0)) |
513 |
|
514 |
# Wait for threads to finish (makes sure the acquire timeout expires
|
515 |
# before releasing the lock)
|
516 |
self._waitThreads()
|
517 |
|
518 |
# Release lock
|
519 |
self.sl.release()
|
520 |
|
521 |
for _ in range(11): |
522 |
self.assertEqual(self.done.get_nowait(), "timeout") |
523 |
|
524 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
525 |
|
526 |
@_Repeat
|
527 |
def testSharedSkipExclusiveAcquires(self): |
528 |
# Tests whether shared acquires jump in front of exclusive acquires in the
|
529 |
# queue.
|
530 |
|
531 |
def _Acquire(shared, name, notify_ev, wait_ev): |
532 |
if notify_ev:
|
533 |
notify_fn = notify_ev.set |
534 |
else:
|
535 |
notify_fn = None
|
536 |
|
537 |
if wait_ev:
|
538 |
wait_ev.wait() |
539 |
|
540 |
if not self.sl.acquire(shared=shared, test_notify=notify_fn): |
541 |
return
|
542 |
|
543 |
self.done.put(name)
|
544 |
self.sl.release()
|
545 |
|
546 |
# Get exclusive lock while we fill the queue
|
547 |
self.sl.acquire()
|
548 |
|
549 |
shrcnt1 = 5
|
550 |
shrcnt2 = 7
|
551 |
shrcnt3 = 9
|
552 |
shrcnt4 = 2
|
553 |
|
554 |
# Add acquires using threading.Event for synchronization. They'll be
|
555 |
# acquired exactly in the order defined in this list.
|
556 |
acquires = (shrcnt1 * [(1, "shared 1")] + |
557 |
3 * [(0, "exclusive 1")] + |
558 |
shrcnt2 * [(1, "shared 2")] + |
559 |
shrcnt3 * [(1, "shared 3")] + |
560 |
shrcnt4 * [(1, "shared 4")] + |
561 |
3 * [(0, "exclusive 2")]) |
562 |
|
563 |
ev_cur = None
|
564 |
ev_prev = None
|
565 |
|
566 |
for args in acquires: |
567 |
ev_cur = threading.Event() |
568 |
self._addThread(target=_Acquire, args=args + (ev_cur, ev_prev))
|
569 |
ev_prev = ev_cur |
570 |
|
571 |
# Wait for last acquire to start
|
572 |
ev_prev.wait() |
573 |
|
574 |
# Expect 6 pending exclusive acquires and 1 for all shared acquires
|
575 |
# together
|
576 |
self.assertEqual(self.sl._count_pending(), 7) |
577 |
|
578 |
# Release exclusive lock and wait
|
579 |
self.sl.release()
|
580 |
|
581 |
self._waitThreads()
|
582 |
|
583 |
# Check sequence
|
584 |
for _ in range(shrcnt1 + shrcnt2 + shrcnt3 + shrcnt4): |
585 |
# Shared locks aren't guaranteed to be notified in order, but they'll be
|
586 |
# first
|
587 |
tmp = self.done.get_nowait()
|
588 |
if tmp == "shared 1": |
589 |
shrcnt1 -= 1
|
590 |
elif tmp == "shared 2": |
591 |
shrcnt2 -= 1
|
592 |
elif tmp == "shared 3": |
593 |
shrcnt3 -= 1
|
594 |
elif tmp == "shared 4": |
595 |
shrcnt4 -= 1
|
596 |
self.assertEqual(shrcnt1, 0) |
597 |
self.assertEqual(shrcnt2, 0) |
598 |
self.assertEqual(shrcnt3, 0) |
599 |
self.assertEqual(shrcnt3, 0) |
600 |
|
601 |
for _ in range(3): |
602 |
self.assertEqual(self.done.get_nowait(), "exclusive 1") |
603 |
|
604 |
for _ in range(3): |
605 |
self.assertEqual(self.done.get_nowait(), "exclusive 2") |
606 |
|
607 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
608 |
|
609 |
@_Repeat
|
610 |
def testMixedAcquireTimeout(self): |
611 |
sync = threading.Event() |
612 |
|
613 |
def _AcquireShared(ev): |
614 |
if not self.sl.acquire(shared=1, timeout=None): |
615 |
return
|
616 |
|
617 |
self.done.put("shared") |
618 |
|
619 |
# Notify main thread
|
620 |
ev.set() |
621 |
|
622 |
# Wait for notification from main thread
|
623 |
sync.wait() |
624 |
|
625 |
# Release lock
|
626 |
self.sl.release()
|
627 |
|
628 |
acquires = [] |
629 |
for _ in range(3): |
630 |
ev = threading.Event() |
631 |
self._addThread(target=_AcquireShared, args=(ev, ))
|
632 |
acquires.append(ev) |
633 |
|
634 |
# Wait for all acquires to finish
|
635 |
for i in acquires: |
636 |
i.wait() |
637 |
|
638 |
self.assertEqual(self.sl._count_pending(), 0) |
639 |
|
640 |
# Try to get exclusive lock
|
641 |
self.failIf(self.sl.acquire(shared=0, timeout=0.02)) |
642 |
|
643 |
# Acquire exclusive without timeout
|
644 |
exclsync = threading.Event() |
645 |
exclev = threading.Event() |
646 |
|
647 |
def _AcquireExclusive(): |
648 |
if not self.sl.acquire(shared=0): |
649 |
return
|
650 |
|
651 |
self.done.put("exclusive") |
652 |
|
653 |
# Notify main thread
|
654 |
exclev.set() |
655 |
|
656 |
# Wait for notification from main thread
|
657 |
exclsync.wait() |
658 |
|
659 |
self.sl.release()
|
660 |
|
661 |
self._addThread(target=_AcquireExclusive)
|
662 |
|
663 |
# Try to get exclusive lock
|
664 |
self.failIf(self.sl.acquire(shared=0, timeout=0.02)) |
665 |
|
666 |
# Make all shared holders release their locks
|
667 |
sync.set() |
668 |
|
669 |
# Wait for exclusive acquire to succeed
|
670 |
exclev.wait() |
671 |
|
672 |
self.assertEqual(self.sl._count_pending(), 0) |
673 |
|
674 |
# Try to get exclusive lock
|
675 |
self.failIf(self.sl.acquire(shared=0, timeout=0.02)) |
676 |
|
677 |
def _AcquireSharedSimple(): |
678 |
if self.sl.acquire(shared=1, timeout=None): |
679 |
self.done.put("shared2") |
680 |
self.sl.release()
|
681 |
|
682 |
for _ in range(10): |
683 |
self._addThread(target=_AcquireSharedSimple)
|
684 |
|
685 |
# Tell exclusive lock to release
|
686 |
exclsync.set() |
687 |
|
688 |
# Wait for everything to finish
|
689 |
self._waitThreads()
|
690 |
|
691 |
self.assertEqual(self.sl._count_pending(), 0) |
692 |
|
693 |
# Check sequence
|
694 |
for _ in range(3): |
695 |
self.assertEqual(self.done.get_nowait(), "shared") |
696 |
|
697 |
self.assertEqual(self.done.get_nowait(), "exclusive") |
698 |
|
699 |
for _ in range(10): |
700 |
self.assertEqual(self.done.get_nowait(), "shared2") |
701 |
|
702 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
703 |
|
704 |
|
705 |
class TestSharedLockInCondition(_ThreadedTestCase): |
706 |
"""SharedLock as a condition lock tests"""
|
707 |
|
708 |
def setUp(self): |
709 |
_ThreadedTestCase.setUp(self)
|
710 |
self.sl = locking.SharedLock("TestSharedLockInCondition") |
711 |
self.setCondition()
|
712 |
|
713 |
def setCondition(self): |
714 |
self.cond = threading.Condition(self.sl) |
715 |
|
716 |
def testKeepMode(self): |
717 |
self.cond.acquire(shared=1) |
718 |
self.assert_(self.sl._is_owned(shared=1)) |
719 |
self.cond.wait(0) |
720 |
self.assert_(self.sl._is_owned(shared=1)) |
721 |
self.cond.release()
|
722 |
self.cond.acquire(shared=0) |
723 |
self.assert_(self.sl._is_owned(shared=0)) |
724 |
self.cond.wait(0) |
725 |
self.assert_(self.sl._is_owned(shared=0)) |
726 |
self.cond.release()
|
727 |
|
728 |
|
729 |
class TestSharedLockInPipeCondition(TestSharedLockInCondition): |
730 |
"""SharedLock as a pipe condition lock tests"""
|
731 |
|
732 |
def setCondition(self): |
733 |
self.cond = locking.PipeCondition(self.sl) |
734 |
|
735 |
|
736 |
class TestSSynchronizedDecorator(_ThreadedTestCase): |
737 |
"""Shared Lock Synchronized decorator test"""
|
738 |
|
739 |
def setUp(self): |
740 |
_ThreadedTestCase.setUp(self)
|
741 |
|
742 |
@locking.ssynchronized(_decoratorlock)
|
743 |
def _doItExclusive(self): |
744 |
self.assert_(_decoratorlock._is_owned())
|
745 |
self.done.put('EXC') |
746 |
|
747 |
@locking.ssynchronized(_decoratorlock, shared=1) |
748 |
def _doItSharer(self): |
749 |
self.assert_(_decoratorlock._is_owned(shared=1)) |
750 |
self.done.put('SHR') |
751 |
|
752 |
def testDecoratedFunctions(self): |
753 |
self._doItExclusive()
|
754 |
self.assertFalse(_decoratorlock._is_owned())
|
755 |
self._doItSharer()
|
756 |
self.assertFalse(_decoratorlock._is_owned())
|
757 |
|
758 |
def testSharersCanCoexist(self): |
759 |
_decoratorlock.acquire(shared=1)
|
760 |
threading.Thread(target=self._doItSharer).start()
|
761 |
self.assert_(self.done.get(True, 1)) |
762 |
_decoratorlock.release() |
763 |
|
764 |
@_Repeat
|
765 |
def testExclusiveBlocksExclusive(self): |
766 |
_decoratorlock.acquire() |
767 |
self._addThread(target=self._doItExclusive) |
768 |
# give it a bit of time to check that it's not actually doing anything
|
769 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
770 |
_decoratorlock.release() |
771 |
self._waitThreads()
|
772 |
self.failUnlessEqual(self.done.get_nowait(), 'EXC') |
773 |
|
774 |
@_Repeat
|
775 |
def testExclusiveBlocksSharer(self): |
776 |
_decoratorlock.acquire() |
777 |
self._addThread(target=self._doItSharer) |
778 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
779 |
_decoratorlock.release() |
780 |
self._waitThreads()
|
781 |
self.failUnlessEqual(self.done.get_nowait(), 'SHR') |
782 |
|
783 |
@_Repeat
|
784 |
def testSharerBlocksExclusive(self): |
785 |
_decoratorlock.acquire(shared=1)
|
786 |
self._addThread(target=self._doItExclusive) |
787 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
788 |
_decoratorlock.release() |
789 |
self._waitThreads()
|
790 |
self.failUnlessEqual(self.done.get_nowait(), 'EXC') |
791 |
|
792 |
|
793 |
class TestLockSet(_ThreadedTestCase): |
794 |
"""LockSet tests"""
|
795 |
|
796 |
def setUp(self): |
797 |
_ThreadedTestCase.setUp(self)
|
798 |
self._setUpLS()
|
799 |
|
800 |
def _setUpLS(self): |
801 |
"""Helper to (re)initialize the lock set"""
|
802 |
self.resources = ['one', 'two', 'three'] |
803 |
self.ls = locking.LockSet(self.resources, "TestLockSet") |
804 |
|
805 |
def testResources(self): |
806 |
self.assertEquals(self.ls._names(), set(self.resources)) |
807 |
newls = locking.LockSet([], "TestLockSet.testResources")
|
808 |
self.assertEquals(newls._names(), set()) |
809 |
|
810 |
def testAcquireRelease(self): |
811 |
self.assert_(self.ls.acquire('one')) |
812 |
self.assertEquals(self.ls._list_owned(), set(['one'])) |
813 |
self.ls.release()
|
814 |
self.assertEquals(self.ls._list_owned(), set()) |
815 |
self.assertEquals(self.ls.acquire(['one']), set(['one'])) |
816 |
self.assertEquals(self.ls._list_owned(), set(['one'])) |
817 |
self.ls.release()
|
818 |
self.assertEquals(self.ls._list_owned(), set()) |
819 |
self.ls.acquire(['one', 'two', 'three']) |
820 |
self.assertEquals(self.ls._list_owned(), set(['one', 'two', 'three'])) |
821 |
self.ls.release('one') |
822 |
self.assertEquals(self.ls._list_owned(), set(['two', 'three'])) |
823 |
self.ls.release(['three']) |
824 |
self.assertEquals(self.ls._list_owned(), set(['two'])) |
825 |
self.ls.release()
|
826 |
self.assertEquals(self.ls._list_owned(), set()) |
827 |
self.assertEquals(self.ls.acquire(['one', 'three']), set(['one', 'three'])) |
828 |
self.assertEquals(self.ls._list_owned(), set(['one', 'three'])) |
829 |
self.ls.release()
|
830 |
self.assertEquals(self.ls._list_owned(), set()) |
831 |
|
832 |
def testNoDoubleAcquire(self): |
833 |
self.ls.acquire('one') |
834 |
self.assertRaises(AssertionError, self.ls.acquire, 'one') |
835 |
self.assertRaises(AssertionError, self.ls.acquire, ['two']) |
836 |
self.assertRaises(AssertionError, self.ls.acquire, ['two', 'three']) |
837 |
self.ls.release()
|
838 |
self.ls.acquire(['one', 'three']) |
839 |
self.ls.release('one') |
840 |
self.assertRaises(AssertionError, self.ls.acquire, ['two']) |
841 |
self.ls.release('three') |
842 |
|
843 |
def testNoWrongRelease(self): |
844 |
self.assertRaises(AssertionError, self.ls.release) |
845 |
self.ls.acquire('one') |
846 |
self.assertRaises(AssertionError, self.ls.release, 'two') |
847 |
|
848 |
def testAddRemove(self): |
849 |
self.ls.add('four') |
850 |
self.assertEquals(self.ls._list_owned(), set()) |
851 |
self.assert_('four' in self.ls._names()) |
852 |
self.ls.add(['five', 'six', 'seven'], acquired=1) |
853 |
self.assert_('five' in self.ls._names()) |
854 |
self.assert_('six' in self.ls._names()) |
855 |
self.assert_('seven' in self.ls._names()) |
856 |
self.assertEquals(self.ls._list_owned(), set(['five', 'six', 'seven'])) |
857 |
self.assertEquals(self.ls.remove(['five', 'six']), ['five', 'six']) |
858 |
self.assert_('five' not in self.ls._names()) |
859 |
self.assert_('six' not in self.ls._names()) |
860 |
self.assertEquals(self.ls._list_owned(), set(['seven'])) |
861 |
self.assertRaises(AssertionError, self.ls.add, 'eight', acquired=1) |
862 |
self.ls.remove('seven') |
863 |
self.assert_('seven' not in self.ls._names()) |
864 |
self.assertEquals(self.ls._list_owned(), set([])) |
865 |
self.ls.acquire(None, shared=1) |
866 |
self.assertRaises(AssertionError, self.ls.add, 'eight') |
867 |
self.ls.release()
|
868 |
self.ls.acquire(None) |
869 |
self.ls.add('eight', acquired=1) |
870 |
self.assert_('eight' in self.ls._names()) |
871 |
self.assert_('eight' in self.ls._list_owned()) |
872 |
self.ls.add('nine') |
873 |
self.assert_('nine' in self.ls._names()) |
874 |
self.assert_('nine' not in self.ls._list_owned()) |
875 |
self.ls.release()
|
876 |
self.ls.remove(['two']) |
877 |
self.assert_('two' not in self.ls._names()) |
878 |
self.ls.acquire('three') |
879 |
self.assertEquals(self.ls.remove(['three']), ['three']) |
880 |
self.assert_('three' not in self.ls._names()) |
881 |
self.assertEquals(self.ls.remove('three'), []) |
882 |
self.assertEquals(self.ls.remove(['one', 'three', 'six']), ['one']) |
883 |
self.assert_('one' not in self.ls._names()) |
884 |
|
885 |
def testRemoveNonBlocking(self): |
886 |
self.ls.acquire('one') |
887 |
self.assertEquals(self.ls.remove('one'), ['one']) |
888 |
self.ls.acquire(['two', 'three']) |
889 |
self.assertEquals(self.ls.remove(['two', 'three']), |
890 |
['two', 'three']) |
891 |
|
892 |
def testNoDoubleAdd(self): |
893 |
self.assertRaises(errors.LockError, self.ls.add, 'two') |
894 |
self.ls.add('four') |
895 |
self.assertRaises(errors.LockError, self.ls.add, 'four') |
896 |
|
897 |
def testNoWrongRemoves(self): |
898 |
self.ls.acquire(['one', 'three'], shared=1) |
899 |
# Cannot remove 'two' while holding something which is not a superset
|
900 |
self.assertRaises(AssertionError, self.ls.remove, 'two') |
901 |
# Cannot remove 'three' as we are sharing it
|
902 |
self.assertRaises(AssertionError, self.ls.remove, 'three') |
903 |
|
904 |
def testAcquireSetLock(self): |
905 |
# acquire the set-lock exclusively
|
906 |
self.assertEquals(self.ls.acquire(None), set(['one', 'two', 'three'])) |
907 |
self.assertEquals(self.ls._list_owned(), set(['one', 'two', 'three'])) |
908 |
self.assertEquals(self.ls._is_owned(), True) |
909 |
self.assertEquals(self.ls._names(), set(['one', 'two', 'three'])) |
910 |
# I can still add/remove elements...
|
911 |
self.assertEquals(self.ls.remove(['two', 'three']), ['two', 'three']) |
912 |
self.assert_(self.ls.add('six')) |
913 |
self.ls.release()
|
914 |
# share the set-lock
|
915 |
self.assertEquals(self.ls.acquire(None, shared=1), set(['one', 'six'])) |
916 |
# adding new elements is not possible
|
917 |
self.assertRaises(AssertionError, self.ls.add, 'five') |
918 |
self.ls.release()
|
919 |
|
920 |
def testAcquireWithRepetitions(self): |
921 |
self.assertEquals(self.ls.acquire(['two', 'two', 'three'], shared=1), |
922 |
set(['two', 'two', 'three'])) |
923 |
self.ls.release(['two', 'two']) |
924 |
self.assertEquals(self.ls._list_owned(), set(['three'])) |
925 |
|
926 |
def testEmptyAcquire(self): |
927 |
# Acquire an empty list of locks...
|
928 |
self.assertEquals(self.ls.acquire([]), set()) |
929 |
self.assertEquals(self.ls._list_owned(), set()) |
930 |
# New locks can still be addded
|
931 |
self.assert_(self.ls.add('six')) |
932 |
# "re-acquiring" is not an issue, since we had really acquired nothing
|
933 |
self.assertEquals(self.ls.acquire([], shared=1), set()) |
934 |
self.assertEquals(self.ls._list_owned(), set()) |
935 |
# We haven't really acquired anything, so we cannot release
|
936 |
self.assertRaises(AssertionError, self.ls.release) |
937 |
|
938 |
def _doLockSet(self, names, shared): |
939 |
try:
|
940 |
self.ls.acquire(names, shared=shared)
|
941 |
self.done.put('DONE') |
942 |
self.ls.release()
|
943 |
except errors.LockError:
|
944 |
self.done.put('ERR') |
945 |
|
946 |
def _doAddSet(self, names): |
947 |
try:
|
948 |
self.ls.add(names, acquired=1) |
949 |
self.done.put('DONE') |
950 |
self.ls.release()
|
951 |
except errors.LockError:
|
952 |
self.done.put('ERR') |
953 |
|
954 |
def _doRemoveSet(self, names): |
955 |
self.done.put(self.ls.remove(names)) |
956 |
|
957 |
@_Repeat
|
958 |
def testConcurrentSharedAcquire(self): |
959 |
self.ls.acquire(['one', 'two'], shared=1) |
960 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 1)) |
961 |
self._waitThreads()
|
962 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
963 |
self._addThread(target=self._doLockSet, args=(['one', 'two', 'three'], 1)) |
964 |
self._waitThreads()
|
965 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
966 |
self._addThread(target=self._doLockSet, args=('three', 1)) |
967 |
self._waitThreads()
|
968 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
969 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 0)) |
970 |
self._addThread(target=self._doLockSet, args=(['two', 'three'], 0)) |
971 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
972 |
self.ls.release()
|
973 |
self._waitThreads()
|
974 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
975 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
976 |
|
977 |
@_Repeat
|
978 |
def testConcurrentExclusiveAcquire(self): |
979 |
self.ls.acquire(['one', 'two']) |
980 |
self._addThread(target=self._doLockSet, args=('three', 1)) |
981 |
self._waitThreads()
|
982 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
983 |
self._addThread(target=self._doLockSet, args=('three', 0)) |
984 |
self._waitThreads()
|
985 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
986 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
987 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 0)) |
988 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 1)) |
989 |
self._addThread(target=self._doLockSet, args=('one', 0)) |
990 |
self._addThread(target=self._doLockSet, args=('one', 1)) |
991 |
self._addThread(target=self._doLockSet, args=(['two', 'three'], 0)) |
992 |
self._addThread(target=self._doLockSet, args=(['two', 'three'], 1)) |
993 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
994 |
self.ls.release()
|
995 |
self._waitThreads()
|
996 |
for _ in range(6): |
997 |
self.failUnlessEqual(self.done.get_nowait(), 'DONE') |
998 |
|
999 |
@_Repeat
|
1000 |
def testSimpleAcquireTimeoutExpiring(self): |
1001 |
names = sorted(self.ls._names()) |
1002 |
self.assert_(len(names) >= 3) |
1003 |
|
1004 |
# Get name of first lock
|
1005 |
first = names[0]
|
1006 |
|
1007 |
# Get name of last lock
|
1008 |
last = names.pop() |
1009 |
|
1010 |
checks = [ |
1011 |
# Block first and try to lock it again
|
1012 |
(first, first), |
1013 |
|
1014 |
# Block last and try to lock all locks
|
1015 |
(None, first),
|
1016 |
|
1017 |
# Block last and try to lock it again
|
1018 |
(last, last), |
1019 |
] |
1020 |
|
1021 |
for (wanted, block) in checks: |
1022 |
# Lock in exclusive mode
|
1023 |
self.assert_(self.ls.acquire(block, shared=0)) |
1024 |
|
1025 |
def _AcquireOne(): |
1026 |
# Try to get the same lock again with a timeout (should never succeed)
|
1027 |
acquired = self.ls.acquire(wanted, timeout=0.1, shared=0) |
1028 |
if acquired:
|
1029 |
self.done.put("acquired") |
1030 |
self.ls.release()
|
1031 |
else:
|
1032 |
self.assert_(acquired is None) |
1033 |
self.assertFalse(self.ls._list_owned()) |
1034 |
self.assertFalse(self.ls._is_owned()) |
1035 |
self.done.put("not acquired") |
1036 |
|
1037 |
self._addThread(target=_AcquireOne)
|
1038 |
|
1039 |
# Wait for timeout in thread to expire
|
1040 |
self._waitThreads()
|
1041 |
|
1042 |
# Release exclusive lock again
|
1043 |
self.ls.release()
|
1044 |
|
1045 |
self.assertEqual(self.done.get_nowait(), "not acquired") |
1046 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1047 |
|
1048 |
@_Repeat
|
1049 |
def testDelayedAndExpiringLockAcquire(self): |
1050 |
self._setUpLS()
|
1051 |
self.ls.add(['five', 'six', 'seven', 'eight', 'nine']) |
1052 |
|
1053 |
for expire in (False, True): |
1054 |
names = sorted(self.ls._names()) |
1055 |
self.assertEqual(len(names), 8) |
1056 |
|
1057 |
lock_ev = dict([(i, threading.Event()) for i in names]) |
1058 |
|
1059 |
# Lock all in exclusive mode
|
1060 |
self.assert_(self.ls.acquire(names, shared=0)) |
1061 |
|
1062 |
if expire:
|
1063 |
# We'll wait at least 300ms per lock
|
1064 |
lockwait = len(names) * [0.3] |
1065 |
|
1066 |
# Fail if we can't acquire all locks in 400ms. There are 8 locks, so
|
1067 |
# this gives us up to 2.4s to fail.
|
1068 |
lockall_timeout = 0.4
|
1069 |
else:
|
1070 |
# This should finish rather quickly
|
1071 |
lockwait = None
|
1072 |
lockall_timeout = len(names) * 5.0 |
1073 |
|
1074 |
def _LockAll(): |
1075 |
def acquire_notification(name): |
1076 |
if not expire: |
1077 |
self.done.put("getting %s" % name) |
1078 |
|
1079 |
# Kick next lock
|
1080 |
lock_ev[name].set() |
1081 |
|
1082 |
if self.ls.acquire(names, shared=0, timeout=lockall_timeout, |
1083 |
test_notify=acquire_notification): |
1084 |
self.done.put("got all") |
1085 |
self.ls.release()
|
1086 |
else:
|
1087 |
self.done.put("timeout on all") |
1088 |
|
1089 |
# Notify all locks
|
1090 |
for ev in lock_ev.values(): |
1091 |
ev.set() |
1092 |
|
1093 |
t = self._addThread(target=_LockAll)
|
1094 |
|
1095 |
for idx, name in enumerate(names): |
1096 |
# Wait for actual acquire on this lock to start
|
1097 |
lock_ev[name].wait(10.0)
|
1098 |
|
1099 |
if expire and t.isAlive(): |
1100 |
# Wait some time after getting the notification to make sure the lock
|
1101 |
# acquire will expire
|
1102 |
SafeSleep(lockwait[idx]) |
1103 |
|
1104 |
self.ls.release(names=name)
|
1105 |
|
1106 |
self.assertFalse(self.ls._list_owned()) |
1107 |
|
1108 |
self._waitThreads()
|
1109 |
|
1110 |
if expire:
|
1111 |
# Not checking which locks were actually acquired. Doing so would be
|
1112 |
# too timing-dependant.
|
1113 |
self.assertEqual(self.done.get_nowait(), "timeout on all") |
1114 |
else:
|
1115 |
for i in names: |
1116 |
self.assertEqual(self.done.get_nowait(), "getting %s" % i) |
1117 |
self.assertEqual(self.done.get_nowait(), "got all") |
1118 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1119 |
|
1120 |
@_Repeat
|
1121 |
def testConcurrentRemove(self): |
1122 |
self.ls.add('four') |
1123 |
self.ls.acquire(['one', 'two', 'four']) |
1124 |
self._addThread(target=self._doLockSet, args=(['one', 'four'], 0)) |
1125 |
self._addThread(target=self._doLockSet, args=(['one', 'four'], 1)) |
1126 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 0)) |
1127 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 1)) |
1128 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1129 |
self.ls.remove('one') |
1130 |
self.ls.release()
|
1131 |
self._waitThreads()
|
1132 |
for i in range(4): |
1133 |
self.failUnlessEqual(self.done.get_nowait(), 'ERR') |
1134 |
self.ls.add(['five', 'six'], acquired=1) |
1135 |
self._addThread(target=self._doLockSet, args=(['three', 'six'], 1)) |
1136 |
self._addThread(target=self._doLockSet, args=(['three', 'six'], 0)) |
1137 |
self._addThread(target=self._doLockSet, args=(['four', 'six'], 1)) |
1138 |
self._addThread(target=self._doLockSet, args=(['four', 'six'], 0)) |
1139 |
self.ls.remove('five') |
1140 |
self.ls.release()
|
1141 |
self._waitThreads()
|
1142 |
for i in range(4): |
1143 |
self.failUnlessEqual(self.done.get_nowait(), 'DONE') |
1144 |
self.ls.acquire(['three', 'four']) |
1145 |
self._addThread(target=self._doRemoveSet, args=(['four', 'six'], )) |
1146 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1147 |
self.ls.remove('four') |
1148 |
self._waitThreads()
|
1149 |
self.assertEqual(self.done.get_nowait(), ['six']) |
1150 |
self._addThread(target=self._doRemoveSet, args=(['two'])) |
1151 |
self._waitThreads()
|
1152 |
self.assertEqual(self.done.get_nowait(), ['two']) |
1153 |
self.ls.release()
|
1154 |
# reset lockset
|
1155 |
self._setUpLS()
|
1156 |
|
1157 |
@_Repeat
|
1158 |
def testConcurrentSharedSetLock(self): |
1159 |
# share the set-lock...
|
1160 |
self.ls.acquire(None, shared=1) |
1161 |
# ...another thread can share it too
|
1162 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
1163 |
self._waitThreads()
|
1164 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1165 |
# ...or just share some elements
|
1166 |
self._addThread(target=self._doLockSet, args=(['one', 'three'], 1)) |
1167 |
self._waitThreads()
|
1168 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1169 |
# ...but not add new ones or remove any
|
1170 |
t = self._addThread(target=self._doAddSet, args=(['nine'])) |
1171 |
self._addThread(target=self._doRemoveSet, args=(['two'], )) |
1172 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1173 |
# this just releases the set-lock
|
1174 |
self.ls.release([])
|
1175 |
t.join(60)
|
1176 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1177 |
# release the lock on the actual elements so remove() can proceed too
|
1178 |
self.ls.release()
|
1179 |
self._waitThreads()
|
1180 |
self.failUnlessEqual(self.done.get_nowait(), ['two']) |
1181 |
# reset lockset
|
1182 |
self._setUpLS()
|
1183 |
|
1184 |
@_Repeat
|
1185 |
def testConcurrentExclusiveSetLock(self): |
1186 |
# acquire the set-lock...
|
1187 |
self.ls.acquire(None, shared=0) |
1188 |
# ...no one can do anything else
|
1189 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
1190 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
1191 |
self._addThread(target=self._doLockSet, args=(['three'], 0)) |
1192 |
self._addThread(target=self._doLockSet, args=(['two'], 1)) |
1193 |
self._addThread(target=self._doAddSet, args=(['nine'])) |
1194 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1195 |
self.ls.release()
|
1196 |
self._waitThreads()
|
1197 |
for _ in range(5): |
1198 |
self.assertEqual(self.done.get(True, 1), 'DONE') |
1199 |
# cleanup
|
1200 |
self._setUpLS()
|
1201 |
|
1202 |
@_Repeat
|
1203 |
def testConcurrentSetLockAdd(self): |
1204 |
self.ls.acquire('one') |
1205 |
# Another thread wants the whole SetLock
|
1206 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
1207 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
1208 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1209 |
self.assertRaises(AssertionError, self.ls.add, 'four') |
1210 |
self.ls.release()
|
1211 |
self._waitThreads()
|
1212 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1213 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1214 |
self.ls.acquire(None) |
1215 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
1216 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
1217 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1218 |
self.ls.add('four') |
1219 |
self.ls.add('five', acquired=1) |
1220 |
self.ls.add('six', acquired=1, shared=1) |
1221 |
self.assertEquals(self.ls._list_owned(), |
1222 |
set(['one', 'two', 'three', 'five', 'six'])) |
1223 |
self.assertEquals(self.ls._is_owned(), True) |
1224 |
self.assertEquals(self.ls._names(), |
1225 |
set(['one', 'two', 'three', 'four', 'five', 'six'])) |
1226 |
self.ls.release()
|
1227 |
self._waitThreads()
|
1228 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1229 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1230 |
self._setUpLS()
|
1231 |
|
1232 |
@_Repeat
|
1233 |
def testEmptyLockSet(self): |
1234 |
# get the set-lock
|
1235 |
self.assertEqual(self.ls.acquire(None), set(['one', 'two', 'three'])) |
1236 |
# now empty it...
|
1237 |
self.ls.remove(['one', 'two', 'three']) |
1238 |
# and adds/locks by another thread still wait
|
1239 |
self._addThread(target=self._doAddSet, args=(['nine'])) |
1240 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
1241 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
1242 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1243 |
self.ls.release()
|
1244 |
self._waitThreads()
|
1245 |
for _ in range(3): |
1246 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1247 |
# empty it again...
|
1248 |
self.assertEqual(self.ls.remove(['nine']), ['nine']) |
1249 |
# now share it...
|
1250 |
self.assertEqual(self.ls.acquire(None, shared=1), set()) |
1251 |
# other sharers can go, adds still wait
|
1252 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
1253 |
self._waitThreads()
|
1254 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1255 |
self._addThread(target=self._doAddSet, args=(['nine'])) |
1256 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1257 |
self.ls.release()
|
1258 |
self._waitThreads()
|
1259 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1260 |
self._setUpLS()
|
1261 |
|
1262 |
|
1263 |
class TestGanetiLockManager(_ThreadedTestCase): |
1264 |
|
1265 |
def setUp(self): |
1266 |
_ThreadedTestCase.setUp(self)
|
1267 |
self.nodes=['n1', 'n2'] |
1268 |
self.instances=['i1', 'i2', 'i3'] |
1269 |
self.GL = locking.GanetiLockManager(nodes=self.nodes, |
1270 |
instances=self.instances)
|
1271 |
|
1272 |
def tearDown(self): |
1273 |
# Don't try this at home...
|
1274 |
locking.GanetiLockManager._instance = None
|
1275 |
|
1276 |
def testLockingConstants(self): |
1277 |
# The locking library internally cheats by assuming its constants have some
|
1278 |
# relationships with each other. Check those hold true.
|
1279 |
# This relationship is also used in the Processor to recursively acquire
|
1280 |
# the right locks. Again, please don't break it.
|
1281 |
for i in range(len(locking.LEVELS)): |
1282 |
self.assertEqual(i, locking.LEVELS[i])
|
1283 |
|
1284 |
def testDoubleGLFails(self): |
1285 |
self.assertRaises(AssertionError, locking.GanetiLockManager) |
1286 |
|
1287 |
def testLockNames(self): |
1288 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
1289 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set(self.nodes)) |
1290 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), |
1291 |
set(self.instances)) |
1292 |
|
1293 |
def testInitAndResources(self): |
1294 |
locking.GanetiLockManager._instance = None
|
1295 |
self.GL = locking.GanetiLockManager([], [])
|
1296 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
1297 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set()) |
1298 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), set()) |
1299 |
|
1300 |
locking.GanetiLockManager._instance = None
|
1301 |
self.GL = locking.GanetiLockManager(self.nodes, []) |
1302 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
1303 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set(self.nodes)) |
1304 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), set()) |
1305 |
|
1306 |
locking.GanetiLockManager._instance = None
|
1307 |
self.GL = locking.GanetiLockManager([], self.instances) |
1308 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
1309 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set()) |
1310 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), |
1311 |
set(self.instances)) |
1312 |
|
1313 |
def testAcquireRelease(self): |
1314 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
1315 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_CLUSTER), set(['BGL'])) |
1316 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i1']) |
1317 |
self.GL.acquire(locking.LEVEL_NODE, ['n1', 'n2'], shared=1) |
1318 |
self.GL.release(locking.LEVEL_NODE, ['n2']) |
1319 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), set(['n1'])) |
1320 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), set(['i1'])) |
1321 |
self.GL.release(locking.LEVEL_NODE)
|
1322 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), set()) |
1323 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), set(['i1'])) |
1324 |
self.GL.release(locking.LEVEL_INSTANCE)
|
1325 |
self.assertRaises(errors.LockError, self.GL.acquire, |
1326 |
locking.LEVEL_INSTANCE, ['i5'])
|
1327 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i3'], shared=1) |
1328 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), set(['i3'])) |
1329 |
|
1330 |
def testAcquireWholeSets(self): |
1331 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
1332 |
self.assertEquals(self.GL.acquire(locking.LEVEL_INSTANCE, None), |
1333 |
set(self.instances)) |
1334 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), |
1335 |
set(self.instances)) |
1336 |
self.assertEquals(self.GL.acquire(locking.LEVEL_NODE, None, shared=1), |
1337 |
set(self.nodes)) |
1338 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), |
1339 |
set(self.nodes)) |
1340 |
self.GL.release(locking.LEVEL_NODE)
|
1341 |
self.GL.release(locking.LEVEL_INSTANCE)
|
1342 |
self.GL.release(locking.LEVEL_CLUSTER)
|
1343 |
|
1344 |
def testAcquireWholeAndPartial(self): |
1345 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
1346 |
self.assertEquals(self.GL.acquire(locking.LEVEL_INSTANCE, None), |
1347 |
set(self.instances)) |
1348 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), |
1349 |
set(self.instances)) |
1350 |
self.assertEquals(self.GL.acquire(locking.LEVEL_NODE, ['n2'], shared=1), |
1351 |
set(['n2'])) |
1352 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), |
1353 |
set(['n2'])) |
1354 |
self.GL.release(locking.LEVEL_NODE)
|
1355 |
self.GL.release(locking.LEVEL_INSTANCE)
|
1356 |
self.GL.release(locking.LEVEL_CLUSTER)
|
1357 |
|
1358 |
def testBGLDependency(self): |
1359 |
self.assertRaises(AssertionError, self.GL.acquire, |
1360 |
locking.LEVEL_NODE, ['n1', 'n2']) |
1361 |
self.assertRaises(AssertionError, self.GL.acquire, |
1362 |
locking.LEVEL_INSTANCE, ['i3'])
|
1363 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
1364 |
self.GL.acquire(locking.LEVEL_NODE, ['n1']) |
1365 |
self.assertRaises(AssertionError, self.GL.release, |
1366 |
locking.LEVEL_CLUSTER, ['BGL'])
|
1367 |
self.assertRaises(AssertionError, self.GL.release, |
1368 |
locking.LEVEL_CLUSTER) |
1369 |
self.GL.release(locking.LEVEL_NODE)
|
1370 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i1', 'i2']) |
1371 |
self.assertRaises(AssertionError, self.GL.release, |
1372 |
locking.LEVEL_CLUSTER, ['BGL'])
|
1373 |
self.assertRaises(AssertionError, self.GL.release, |
1374 |
locking.LEVEL_CLUSTER) |
1375 |
self.GL.release(locking.LEVEL_INSTANCE)
|
1376 |
|
1377 |
def testWrongOrder(self): |
1378 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
1379 |
self.GL.acquire(locking.LEVEL_NODE, ['n2']) |
1380 |
self.assertRaises(AssertionError, self.GL.acquire, |
1381 |
locking.LEVEL_NODE, ['n1'])
|
1382 |
self.assertRaises(AssertionError, self.GL.acquire, |
1383 |
locking.LEVEL_INSTANCE, ['i2'])
|
1384 |
|
1385 |
# Helper function to run as a thread that shared the BGL and then acquires
|
1386 |
# some locks at another level.
|
1387 |
def _doLock(self, level, names, shared): |
1388 |
try:
|
1389 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
1390 |
self.GL.acquire(level, names, shared=shared)
|
1391 |
self.done.put('DONE') |
1392 |
self.GL.release(level)
|
1393 |
self.GL.release(locking.LEVEL_CLUSTER)
|
1394 |
except errors.LockError:
|
1395 |
self.done.put('ERR') |
1396 |
|
1397 |
@_Repeat
|
1398 |
def testConcurrency(self): |
1399 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
1400 |
self._addThread(target=self._doLock, |
1401 |
args=(locking.LEVEL_INSTANCE, 'i1', 1)) |
1402 |
self._waitThreads()
|
1403 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1404 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i3']) |
1405 |
self._addThread(target=self._doLock, |
1406 |
args=(locking.LEVEL_INSTANCE, 'i1', 1)) |
1407 |
self._waitThreads()
|
1408 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1409 |
self._addThread(target=self._doLock, |
1410 |
args=(locking.LEVEL_INSTANCE, 'i3', 1)) |
1411 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1412 |
self.GL.release(locking.LEVEL_INSTANCE)
|
1413 |
self._waitThreads()
|
1414 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1415 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i2'], shared=1) |
1416 |
self._addThread(target=self._doLock, |
1417 |
args=(locking.LEVEL_INSTANCE, 'i2', 1)) |
1418 |
self._waitThreads()
|
1419 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
1420 |
self._addThread(target=self._doLock, |
1421 |
args=(locking.LEVEL_INSTANCE, 'i2', 0)) |
1422 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
1423 |
self.GL.release(locking.LEVEL_INSTANCE)
|
1424 |
self._waitThreads()
|
1425 |
self.assertEqual(self.done.get(True, 1), 'DONE') |
1426 |
self.GL.release(locking.LEVEL_CLUSTER, ['BGL']) |
1427 |
|
1428 |
|
1429 |
class TestLockMonitor(_ThreadedTestCase): |
1430 |
def setUp(self): |
1431 |
_ThreadedTestCase.setUp(self)
|
1432 |
self.lm = locking.LockMonitor()
|
1433 |
|
1434 |
def testSingleThread(self): |
1435 |
locks = [] |
1436 |
|
1437 |
for i in range(100): |
1438 |
name = "TestLock%s" % i
|
1439 |
locks.append(locking.SharedLock(name, monitor=self.lm))
|
1440 |
|
1441 |
self.assertEqual(len(self.lm._locks), len(locks)) |
1442 |
|
1443 |
self.assertEqual(len(self.lm.QueryLocks(["name"], False)), |
1444 |
100)
|
1445 |
|
1446 |
# Delete all locks
|
1447 |
del locks[:]
|
1448 |
|
1449 |
# The garbage collector might needs some time
|
1450 |
def _CheckLocks(): |
1451 |
if self.lm._locks: |
1452 |
raise utils.RetryAgain()
|
1453 |
|
1454 |
utils.Retry(_CheckLocks, 0.1, 30.0) |
1455 |
|
1456 |
self.assertFalse(self.lm._locks) |
1457 |
|
1458 |
def testMultiThread(self): |
1459 |
locks = [] |
1460 |
|
1461 |
def _CreateLock(prev, next, name): |
1462 |
prev.wait() |
1463 |
locks.append(locking.SharedLock(name, monitor=self.lm))
|
1464 |
if next: |
1465 |
next.set()
|
1466 |
|
1467 |
expnames = [] |
1468 |
|
1469 |
first = threading.Event() |
1470 |
prev = first |
1471 |
|
1472 |
# Use a deterministic random generator
|
1473 |
for i in random.Random(4263).sample(range(100), 33): |
1474 |
name = "MtTestLock%s" % i
|
1475 |
expnames.append(name) |
1476 |
|
1477 |
ev = threading.Event() |
1478 |
self._addThread(target=_CreateLock, args=(prev, ev, name))
|
1479 |
prev = ev |
1480 |
|
1481 |
# Add locks
|
1482 |
first.set() |
1483 |
self._waitThreads()
|
1484 |
|
1485 |
# Check order in which locks were added
|
1486 |
self.assertEqual([i.name for i in locks], expnames) |
1487 |
|
1488 |
# Sync queries are not supported
|
1489 |
self.assertRaises(NotImplementedError, self.lm.QueryLocks, ["name"], True) |
1490 |
|
1491 |
# Check query result
|
1492 |
self.assertEqual(self.lm.QueryLocks(["name", "mode", "owner", "pending"], |
1493 |
False),
|
1494 |
[[name, None, None, []] |
1495 |
for name in utils.NiceSort(expnames)]) |
1496 |
|
1497 |
# Test exclusive acquire
|
1498 |
for tlock in locks[::4]: |
1499 |
tlock.acquire(shared=0)
|
1500 |
try:
|
1501 |
def _GetExpResult(name): |
1502 |
if tlock.name == name:
|
1503 |
return [name, "exclusive", [threading.currentThread().getName()], |
1504 |
[]] |
1505 |
return [name, None, None, []] |
1506 |
|
1507 |
self.assertEqual(self.lm.QueryLocks(["name", "mode", "owner", |
1508 |
"pending"], False), |
1509 |
[_GetExpResult(name) |
1510 |
for name in utils.NiceSort(expnames)]) |
1511 |
finally:
|
1512 |
tlock.release() |
1513 |
|
1514 |
# Test shared acquire
|
1515 |
def _Acquire(lock, shared, ev, notify): |
1516 |
lock.acquire(shared=shared) |
1517 |
try:
|
1518 |
notify.set() |
1519 |
ev.wait() |
1520 |
finally:
|
1521 |
lock.release() |
1522 |
|
1523 |
for tlock1 in locks[::11]: |
1524 |
for tlock2 in locks[::-15]: |
1525 |
if tlock2 == tlock1:
|
1526 |
# Avoid deadlocks
|
1527 |
continue
|
1528 |
|
1529 |
for tlock3 in locks[::10]: |
1530 |
if tlock3 in (tlock2, tlock1): |
1531 |
# Avoid deadlocks
|
1532 |
continue
|
1533 |
|
1534 |
releaseev = threading.Event() |
1535 |
|
1536 |
# Acquire locks
|
1537 |
acquireev = [] |
1538 |
tthreads1 = [] |
1539 |
for i in range(3): |
1540 |
ev = threading.Event() |
1541 |
tthreads1.append(self._addThread(target=_Acquire,
|
1542 |
args=(tlock1, 1, releaseev, ev)))
|
1543 |
acquireev.append(ev) |
1544 |
|
1545 |
ev = threading.Event() |
1546 |
tthread2 = self._addThread(target=_Acquire,
|
1547 |
args=(tlock2, 1, releaseev, ev))
|
1548 |
acquireev.append(ev) |
1549 |
|
1550 |
ev = threading.Event() |
1551 |
tthread3 = self._addThread(target=_Acquire,
|
1552 |
args=(tlock3, 0, releaseev, ev))
|
1553 |
acquireev.append(ev) |
1554 |
|
1555 |
# Wait for all locks to be acquired
|
1556 |
for i in acquireev: |
1557 |
i.wait() |
1558 |
|
1559 |
# Check query result
|
1560 |
for (name, mode, owner) in self.lm.QueryLocks(["name", "mode", |
1561 |
"owner"], False): |
1562 |
if name == tlock1.name:
|
1563 |
self.assertEqual(mode, "shared") |
1564 |
self.assertEqual(set(owner), set(i.getName() for i in tthreads1)) |
1565 |
continue
|
1566 |
|
1567 |
if name == tlock2.name:
|
1568 |
self.assertEqual(mode, "shared") |
1569 |
self.assertEqual(owner, [tthread2.getName()])
|
1570 |
continue
|
1571 |
|
1572 |
if name == tlock3.name:
|
1573 |
self.assertEqual(mode, "exclusive") |
1574 |
self.assertEqual(owner, [tthread3.getName()])
|
1575 |
continue
|
1576 |
|
1577 |
self.assert_(name in expnames) |
1578 |
self.assert_(mode is None) |
1579 |
self.assert_(owner is None) |
1580 |
|
1581 |
# Release locks again
|
1582 |
releaseev.set() |
1583 |
|
1584 |
self._waitThreads()
|
1585 |
|
1586 |
self.assertEqual(self.lm.QueryLocks(["name", "mode", "owner"], False), |
1587 |
[[name, None, None] |
1588 |
for name in utils.NiceSort(expnames)]) |
1589 |
|
1590 |
def testDelete(self): |
1591 |
lock = locking.SharedLock("TestLock", monitor=self.lm) |
1592 |
|
1593 |
self.assertEqual(len(self.lm._locks), 1) |
1594 |
self.assertEqual(self.lm.QueryLocks(["name", "mode", "owner"], False), |
1595 |
[[lock.name, None, None]]) |
1596 |
|
1597 |
lock.delete() |
1598 |
|
1599 |
self.assertEqual(self.lm.QueryLocks(["name", "mode", "owner"], False), |
1600 |
[[lock.name, "deleted", None]]) |
1601 |
self.assertEqual(len(self.lm._locks), 1) |
1602 |
|
1603 |
def testPending(self): |
1604 |
def _Acquire(lock, shared, prev, next): |
1605 |
prev.wait() |
1606 |
|
1607 |
lock.acquire(shared=shared, test_notify=next.set)
|
1608 |
try:
|
1609 |
pass
|
1610 |
finally:
|
1611 |
lock.release() |
1612 |
|
1613 |
lock = locking.SharedLock("ExcLock", monitor=self.lm) |
1614 |
|
1615 |
for shared in [0, 1]: |
1616 |
lock.acquire() |
1617 |
try:
|
1618 |
self.assertEqual(len(self.lm._locks), 1) |
1619 |
self.assertEqual(self.lm.QueryLocks(["name", "mode", "owner"], False), |
1620 |
[[lock.name, "exclusive",
|
1621 |
[threading.currentThread().getName()]]]) |
1622 |
|
1623 |
threads = [] |
1624 |
|
1625 |
first = threading.Event() |
1626 |
prev = first |
1627 |
|
1628 |
for i in range(5): |
1629 |
ev = threading.Event() |
1630 |
threads.append(self._addThread(target=_Acquire,
|
1631 |
args=(lock, shared, prev, ev))) |
1632 |
prev = ev |
1633 |
|
1634 |
# Start acquires
|
1635 |
first.set() |
1636 |
|
1637 |
# Wait for last acquire to start waiting
|
1638 |
prev.wait() |
1639 |
|
1640 |
# NOTE: This works only because QueryLocks will acquire the
|
1641 |
# lock-internal lock again and won't be able to get the information
|
1642 |
# until it has the lock. By then the acquire should be registered in
|
1643 |
# SharedLock.__pending (otherwise it's a bug).
|
1644 |
|
1645 |
# All acquires are waiting now
|
1646 |
if shared:
|
1647 |
pending = [("shared", sorted([t.getName() for t in threads]))] |
1648 |
else:
|
1649 |
pending = [("exclusive", [t.getName()]) for t in threads] |
1650 |
|
1651 |
self.assertEqual(self.lm.QueryLocks(["name", "mode", "owner", |
1652 |
"pending"], False), |
1653 |
[[lock.name, "exclusive",
|
1654 |
[threading.currentThread().getName()], |
1655 |
pending]]) |
1656 |
|
1657 |
self.assertEqual(len(self.lm._locks), 1) |
1658 |
finally:
|
1659 |
lock.release() |
1660 |
|
1661 |
self._waitThreads()
|
1662 |
|
1663 |
# No pending acquires
|
1664 |
self.assertEqual(self.lm.QueryLocks(["name", "mode", "owner", "pending"], |
1665 |
False),
|
1666 |
[[lock.name, None, None, []]]) |
1667 |
|
1668 |
self.assertEqual(len(self.lm._locks), 1) |
1669 |
|
1670 |
|
1671 |
if __name__ == '__main__': |
1672 |
testutils.GanetiTestProgram() |