root / test / ganeti.locking_unittest.py @ 5aab242c
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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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import threading |
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from ganeti import locking |
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from ganeti import errors |
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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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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.assert_(not 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.assert_(not 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.assert_(not 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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self._addThread(target=fn)
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self._addThread(target=fn)
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self._addThread(target=fn)
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# Wait for threads to be waiting
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self.assertEqual(self.done.get(True, 1), "A") |
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self.assertEqual(self.done.get(True, 1), "A") |
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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(self.cond._nwaiters, 3) |
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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()
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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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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()
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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 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()
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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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@_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
|
| 480 |
# on the queue
|
| 481 |
self.failUnless(self.sl.acquire(shared=shared, timeout=60, |
| 482 |
test_notify=release_exclusive.set)) |
| 483 |
|
| 484 |
self.done.put("got 2nd") |
| 485 |
self.sl.release()
|
| 486 |
|
| 487 |
self._waitThreads()
|
| 488 |
|
| 489 |
self.assertEqual(self.done.get_nowait(), "A: end wait") |
| 490 |
self.assertEqual(self.done.get_nowait(), "got 2nd") |
| 491 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 492 |
|
| 493 |
@_Repeat
|
| 494 |
def testAcquireExpiringTimeout(self): |
| 495 |
def _AcquireWithTimeout(shared, timeout): |
| 496 |
if not self.sl.acquire(shared=shared, timeout=timeout): |
| 497 |
self.done.put("timeout") |
| 498 |
|
| 499 |
for shared in [0, 1]: |
| 500 |
# Lock exclusively
|
| 501 |
self.sl.acquire()
|
| 502 |
|
| 503 |
# Start shared acquires with timeout between 0 and 20 ms
|
| 504 |
for i in range(11): |
| 505 |
self._addThread(target=_AcquireWithTimeout,
|
| 506 |
args=(shared, i * 2.0 / 1000.0)) |
| 507 |
|
| 508 |
# Wait for threads to finish (makes sure the acquire timeout expires
|
| 509 |
# before releasing the lock)
|
| 510 |
self._waitThreads()
|
| 511 |
|
| 512 |
# Release lock
|
| 513 |
self.sl.release()
|
| 514 |
|
| 515 |
for _ in range(11): |
| 516 |
self.assertEqual(self.done.get_nowait(), "timeout") |
| 517 |
|
| 518 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 519 |
|
| 520 |
@_Repeat
|
| 521 |
def testSharedSkipExclusiveAcquires(self): |
| 522 |
# Tests whether shared acquires jump in front of exclusive acquires in the
|
| 523 |
# queue.
|
| 524 |
|
| 525 |
def _Acquire(shared, name, notify_ev, wait_ev): |
| 526 |
if notify_ev:
|
| 527 |
notify_fn = notify_ev.set |
| 528 |
else:
|
| 529 |
notify_fn = None
|
| 530 |
|
| 531 |
if wait_ev:
|
| 532 |
wait_ev.wait() |
| 533 |
|
| 534 |
if not self.sl.acquire(shared=shared, test_notify=notify_fn): |
| 535 |
return
|
| 536 |
|
| 537 |
self.done.put(name)
|
| 538 |
self.sl.release()
|
| 539 |
|
| 540 |
# Get exclusive lock while we fill the queue
|
| 541 |
self.sl.acquire()
|
| 542 |
|
| 543 |
shrcnt1 = 5
|
| 544 |
shrcnt2 = 7
|
| 545 |
shrcnt3 = 9
|
| 546 |
shrcnt4 = 2
|
| 547 |
|
| 548 |
# Add acquires using threading.Event for synchronization. They'll be
|
| 549 |
# acquired exactly in the order defined in this list.
|
| 550 |
acquires = (shrcnt1 * [(1, "shared 1")] + |
| 551 |
3 * [(0, "exclusive 1")] + |
| 552 |
shrcnt2 * [(1, "shared 2")] + |
| 553 |
shrcnt3 * [(1, "shared 3")] + |
| 554 |
shrcnt4 * [(1, "shared 4")] + |
| 555 |
3 * [(0, "exclusive 2")]) |
| 556 |
|
| 557 |
ev_cur = None
|
| 558 |
ev_prev = None
|
| 559 |
|
| 560 |
for args in acquires: |
| 561 |
ev_cur = threading.Event() |
| 562 |
self._addThread(target=_Acquire, args=args + (ev_cur, ev_prev))
|
| 563 |
ev_prev = ev_cur |
| 564 |
|
| 565 |
# Wait for last acquire to start
|
| 566 |
ev_prev.wait() |
| 567 |
|
| 568 |
# Expect 6 pending exclusive acquires and 1 for all shared acquires
|
| 569 |
# together
|
| 570 |
self.assertEqual(self.sl._count_pending(), 7) |
| 571 |
|
| 572 |
# Release exclusive lock and wait
|
| 573 |
self.sl.release()
|
| 574 |
|
| 575 |
self._waitThreads()
|
| 576 |
|
| 577 |
# Check sequence
|
| 578 |
for _ in range(shrcnt1 + shrcnt2 + shrcnt3 + shrcnt4): |
| 579 |
# Shared locks aren't guaranteed to be notified in order, but they'll be
|
| 580 |
# first
|
| 581 |
tmp = self.done.get_nowait()
|
| 582 |
if tmp == "shared 1": |
| 583 |
shrcnt1 -= 1
|
| 584 |
elif tmp == "shared 2": |
| 585 |
shrcnt2 -= 1
|
| 586 |
elif tmp == "shared 3": |
| 587 |
shrcnt3 -= 1
|
| 588 |
elif tmp == "shared 4": |
| 589 |
shrcnt4 -= 1
|
| 590 |
self.assertEqual(shrcnt1, 0) |
| 591 |
self.assertEqual(shrcnt2, 0) |
| 592 |
self.assertEqual(shrcnt3, 0) |
| 593 |
self.assertEqual(shrcnt3, 0) |
| 594 |
|
| 595 |
for _ in range(3): |
| 596 |
self.assertEqual(self.done.get_nowait(), "exclusive 1") |
| 597 |
|
| 598 |
for _ in range(3): |
| 599 |
self.assertEqual(self.done.get_nowait(), "exclusive 2") |
| 600 |
|
| 601 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 602 |
|
| 603 |
@_Repeat
|
| 604 |
def testMixedAcquireTimeout(self): |
| 605 |
sync = threading.Condition() |
| 606 |
|
| 607 |
def _AcquireShared(ev): |
| 608 |
if not self.sl.acquire(shared=1, timeout=None): |
| 609 |
return
|
| 610 |
|
| 611 |
self.done.put("shared") |
| 612 |
|
| 613 |
# Notify main thread
|
| 614 |
ev.set() |
| 615 |
|
| 616 |
# Wait for notification
|
| 617 |
sync.acquire() |
| 618 |
try:
|
| 619 |
sync.wait() |
| 620 |
finally:
|
| 621 |
sync.release() |
| 622 |
|
| 623 |
# Release lock
|
| 624 |
self.sl.release()
|
| 625 |
|
| 626 |
acquires = [] |
| 627 |
for _ in range(3): |
| 628 |
ev = threading.Event() |
| 629 |
self._addThread(target=_AcquireShared, args=(ev, ))
|
| 630 |
acquires.append(ev) |
| 631 |
|
| 632 |
# Wait for all acquires to finish
|
| 633 |
for i in acquires: |
| 634 |
i.wait() |
| 635 |
|
| 636 |
self.assertEqual(self.sl._count_pending(), 0) |
| 637 |
|
| 638 |
# Try to get exclusive lock
|
| 639 |
self.failIf(self.sl.acquire(shared=0, timeout=0.02)) |
| 640 |
|
| 641 |
# Acquire exclusive without timeout
|
| 642 |
exclsync = threading.Condition() |
| 643 |
exclev = threading.Event() |
| 644 |
|
| 645 |
def _AcquireExclusive(): |
| 646 |
if not self.sl.acquire(shared=0): |
| 647 |
return
|
| 648 |
|
| 649 |
self.done.put("exclusive") |
| 650 |
|
| 651 |
# Notify main thread
|
| 652 |
exclev.set() |
| 653 |
|
| 654 |
exclsync.acquire() |
| 655 |
try:
|
| 656 |
exclsync.wait() |
| 657 |
finally:
|
| 658 |
exclsync.release() |
| 659 |
|
| 660 |
self.sl.release()
|
| 661 |
|
| 662 |
self._addThread(target=_AcquireExclusive)
|
| 663 |
|
| 664 |
# Try to get exclusive lock
|
| 665 |
self.failIf(self.sl.acquire(shared=0, timeout=0.02)) |
| 666 |
|
| 667 |
# Make all shared holders release their locks
|
| 668 |
sync.acquire() |
| 669 |
try:
|
| 670 |
sync.notifyAll() |
| 671 |
finally:
|
| 672 |
sync.release() |
| 673 |
|
| 674 |
# Wait for exclusive acquire to succeed
|
| 675 |
exclev.wait() |
| 676 |
|
| 677 |
self.assertEqual(self.sl._count_pending(), 0) |
| 678 |
|
| 679 |
# Try to get exclusive lock
|
| 680 |
self.failIf(self.sl.acquire(shared=0, timeout=0.02)) |
| 681 |
|
| 682 |
def _AcquireSharedSimple(): |
| 683 |
if self.sl.acquire(shared=1, timeout=None): |
| 684 |
self.done.put("shared2") |
| 685 |
self.sl.release()
|
| 686 |
|
| 687 |
for _ in range(10): |
| 688 |
self._addThread(target=_AcquireSharedSimple)
|
| 689 |
|
| 690 |
# Tell exclusive lock to release
|
| 691 |
exclsync.acquire() |
| 692 |
try:
|
| 693 |
exclsync.notifyAll() |
| 694 |
finally:
|
| 695 |
exclsync.release() |
| 696 |
|
| 697 |
# Wait for everything to finish
|
| 698 |
self._waitThreads()
|
| 699 |
|
| 700 |
self.assertEqual(self.sl._count_pending(), 0) |
| 701 |
|
| 702 |
# Check sequence
|
| 703 |
for _ in range(3): |
| 704 |
self.assertEqual(self.done.get_nowait(), "shared") |
| 705 |
|
| 706 |
self.assertEqual(self.done.get_nowait(), "exclusive") |
| 707 |
|
| 708 |
for _ in range(10): |
| 709 |
self.assertEqual(self.done.get_nowait(), "shared2") |
| 710 |
|
| 711 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 712 |
|
| 713 |
|
| 714 |
class TestSSynchronizedDecorator(_ThreadedTestCase): |
| 715 |
"""Shared Lock Synchronized decorator test"""
|
| 716 |
|
| 717 |
def setUp(self): |
| 718 |
_ThreadedTestCase.setUp(self)
|
| 719 |
|
| 720 |
@locking.ssynchronized(_decoratorlock)
|
| 721 |
def _doItExclusive(self): |
| 722 |
self.assert_(_decoratorlock._is_owned())
|
| 723 |
self.done.put('EXC') |
| 724 |
|
| 725 |
@locking.ssynchronized(_decoratorlock, shared=1) |
| 726 |
def _doItSharer(self): |
| 727 |
self.assert_(_decoratorlock._is_owned(shared=1)) |
| 728 |
self.done.put('SHR') |
| 729 |
|
| 730 |
def testDecoratedFunctions(self): |
| 731 |
self._doItExclusive()
|
| 732 |
self.assert_(not _decoratorlock._is_owned()) |
| 733 |
self._doItSharer()
|
| 734 |
self.assert_(not _decoratorlock._is_owned()) |
| 735 |
|
| 736 |
def testSharersCanCoexist(self): |
| 737 |
_decoratorlock.acquire(shared=1)
|
| 738 |
threading.Thread(target=self._doItSharer).start()
|
| 739 |
self.assert_(self.done.get(True, 1)) |
| 740 |
_decoratorlock.release() |
| 741 |
|
| 742 |
@_Repeat
|
| 743 |
def testExclusiveBlocksExclusive(self): |
| 744 |
_decoratorlock.acquire() |
| 745 |
self._addThread(target=self._doItExclusive) |
| 746 |
# give it a bit of time to check that it's not actually doing anything
|
| 747 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 748 |
_decoratorlock.release() |
| 749 |
self._waitThreads()
|
| 750 |
self.failUnlessEqual(self.done.get_nowait(), 'EXC') |
| 751 |
|
| 752 |
@_Repeat
|
| 753 |
def testExclusiveBlocksSharer(self): |
| 754 |
_decoratorlock.acquire() |
| 755 |
self._addThread(target=self._doItSharer) |
| 756 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 757 |
_decoratorlock.release() |
| 758 |
self._waitThreads()
|
| 759 |
self.failUnlessEqual(self.done.get_nowait(), 'SHR') |
| 760 |
|
| 761 |
@_Repeat
|
| 762 |
def testSharerBlocksExclusive(self): |
| 763 |
_decoratorlock.acquire(shared=1)
|
| 764 |
self._addThread(target=self._doItExclusive) |
| 765 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 766 |
_decoratorlock.release() |
| 767 |
self._waitThreads()
|
| 768 |
self.failUnlessEqual(self.done.get_nowait(), 'EXC') |
| 769 |
|
| 770 |
|
| 771 |
class TestLockSet(_ThreadedTestCase): |
| 772 |
"""LockSet tests"""
|
| 773 |
|
| 774 |
def setUp(self): |
| 775 |
_ThreadedTestCase.setUp(self)
|
| 776 |
self._setUpLS()
|
| 777 |
|
| 778 |
def _setUpLS(self): |
| 779 |
"""Helper to (re)initialize the lock set"""
|
| 780 |
self.resources = ['one', 'two', 'three'] |
| 781 |
self.ls = locking.LockSet(members=self.resources) |
| 782 |
|
| 783 |
def testResources(self): |
| 784 |
self.assertEquals(self.ls._names(), set(self.resources)) |
| 785 |
newls = locking.LockSet() |
| 786 |
self.assertEquals(newls._names(), set()) |
| 787 |
|
| 788 |
def testAcquireRelease(self): |
| 789 |
self.assert_(self.ls.acquire('one')) |
| 790 |
self.assertEquals(self.ls._list_owned(), set(['one'])) |
| 791 |
self.ls.release()
|
| 792 |
self.assertEquals(self.ls._list_owned(), set()) |
| 793 |
self.assertEquals(self.ls.acquire(['one']), set(['one'])) |
| 794 |
self.assertEquals(self.ls._list_owned(), set(['one'])) |
| 795 |
self.ls.release()
|
| 796 |
self.assertEquals(self.ls._list_owned(), set()) |
| 797 |
self.ls.acquire(['one', 'two', 'three']) |
| 798 |
self.assertEquals(self.ls._list_owned(), set(['one', 'two', 'three'])) |
| 799 |
self.ls.release('one') |
| 800 |
self.assertEquals(self.ls._list_owned(), set(['two', 'three'])) |
| 801 |
self.ls.release(['three']) |
| 802 |
self.assertEquals(self.ls._list_owned(), set(['two'])) |
| 803 |
self.ls.release()
|
| 804 |
self.assertEquals(self.ls._list_owned(), set()) |
| 805 |
self.assertEquals(self.ls.acquire(['one', 'three']), set(['one', 'three'])) |
| 806 |
self.assertEquals(self.ls._list_owned(), set(['one', 'three'])) |
| 807 |
self.ls.release()
|
| 808 |
self.assertEquals(self.ls._list_owned(), set()) |
| 809 |
|
| 810 |
def testNoDoubleAcquire(self): |
| 811 |
self.ls.acquire('one') |
| 812 |
self.assertRaises(AssertionError, self.ls.acquire, 'one') |
| 813 |
self.assertRaises(AssertionError, self.ls.acquire, ['two']) |
| 814 |
self.assertRaises(AssertionError, self.ls.acquire, ['two', 'three']) |
| 815 |
self.ls.release()
|
| 816 |
self.ls.acquire(['one', 'three']) |
| 817 |
self.ls.release('one') |
| 818 |
self.assertRaises(AssertionError, self.ls.acquire, ['two']) |
| 819 |
self.ls.release('three') |
| 820 |
|
| 821 |
def testNoWrongRelease(self): |
| 822 |
self.assertRaises(AssertionError, self.ls.release) |
| 823 |
self.ls.acquire('one') |
| 824 |
self.assertRaises(AssertionError, self.ls.release, 'two') |
| 825 |
|
| 826 |
def testAddRemove(self): |
| 827 |
self.ls.add('four') |
| 828 |
self.assertEquals(self.ls._list_owned(), set()) |
| 829 |
self.assert_('four' in self.ls._names()) |
| 830 |
self.ls.add(['five', 'six', 'seven'], acquired=1) |
| 831 |
self.assert_('five' in self.ls._names()) |
| 832 |
self.assert_('six' in self.ls._names()) |
| 833 |
self.assert_('seven' in self.ls._names()) |
| 834 |
self.assertEquals(self.ls._list_owned(), set(['five', 'six', 'seven'])) |
| 835 |
self.assertEquals(self.ls.remove(['five', 'six']), ['five', 'six']) |
| 836 |
self.assert_('five' not in self.ls._names()) |
| 837 |
self.assert_('six' not in self.ls._names()) |
| 838 |
self.assertEquals(self.ls._list_owned(), set(['seven'])) |
| 839 |
self.assertRaises(AssertionError, self.ls.add, 'eight', acquired=1) |
| 840 |
self.ls.remove('seven') |
| 841 |
self.assert_('seven' not in self.ls._names()) |
| 842 |
self.assertEquals(self.ls._list_owned(), set([])) |
| 843 |
self.ls.acquire(None, shared=1) |
| 844 |
self.assertRaises(AssertionError, self.ls.add, 'eight') |
| 845 |
self.ls.release()
|
| 846 |
self.ls.acquire(None) |
| 847 |
self.ls.add('eight', acquired=1) |
| 848 |
self.assert_('eight' in self.ls._names()) |
| 849 |
self.assert_('eight' in self.ls._list_owned()) |
| 850 |
self.ls.add('nine') |
| 851 |
self.assert_('nine' in self.ls._names()) |
| 852 |
self.assert_('nine' not in self.ls._list_owned()) |
| 853 |
self.ls.release()
|
| 854 |
self.ls.remove(['two']) |
| 855 |
self.assert_('two' not in self.ls._names()) |
| 856 |
self.ls.acquire('three') |
| 857 |
self.assertEquals(self.ls.remove(['three']), ['three']) |
| 858 |
self.assert_('three' not in self.ls._names()) |
| 859 |
self.assertEquals(self.ls.remove('three'), []) |
| 860 |
self.assertEquals(self.ls.remove(['one', 'three', 'six']), ['one']) |
| 861 |
self.assert_('one' not in self.ls._names()) |
| 862 |
|
| 863 |
def testRemoveNonBlocking(self): |
| 864 |
self.ls.acquire('one') |
| 865 |
self.assertEquals(self.ls.remove('one'), ['one']) |
| 866 |
self.ls.acquire(['two', 'three']) |
| 867 |
self.assertEquals(self.ls.remove(['two', 'three']), |
| 868 |
['two', 'three']) |
| 869 |
|
| 870 |
def testNoDoubleAdd(self): |
| 871 |
self.assertRaises(errors.LockError, self.ls.add, 'two') |
| 872 |
self.ls.add('four') |
| 873 |
self.assertRaises(errors.LockError, self.ls.add, 'four') |
| 874 |
|
| 875 |
def testNoWrongRemoves(self): |
| 876 |
self.ls.acquire(['one', 'three'], shared=1) |
| 877 |
# Cannot remove 'two' while holding something which is not a superset
|
| 878 |
self.assertRaises(AssertionError, self.ls.remove, 'two') |
| 879 |
# Cannot remove 'three' as we are sharing it
|
| 880 |
self.assertRaises(AssertionError, self.ls.remove, 'three') |
| 881 |
|
| 882 |
def testAcquireSetLock(self): |
| 883 |
# acquire the set-lock exclusively
|
| 884 |
self.assertEquals(self.ls.acquire(None), set(['one', 'two', 'three'])) |
| 885 |
self.assertEquals(self.ls._list_owned(), set(['one', 'two', 'three'])) |
| 886 |
self.assertEquals(self.ls._is_owned(), True) |
| 887 |
self.assertEquals(self.ls._names(), set(['one', 'two', 'three'])) |
| 888 |
# I can still add/remove elements...
|
| 889 |
self.assertEquals(self.ls.remove(['two', 'three']), ['two', 'three']) |
| 890 |
self.assert_(self.ls.add('six')) |
| 891 |
self.ls.release()
|
| 892 |
# share the set-lock
|
| 893 |
self.assertEquals(self.ls.acquire(None, shared=1), set(['one', 'six'])) |
| 894 |
# adding new elements is not possible
|
| 895 |
self.assertRaises(AssertionError, self.ls.add, 'five') |
| 896 |
self.ls.release()
|
| 897 |
|
| 898 |
def testAcquireWithRepetitions(self): |
| 899 |
self.assertEquals(self.ls.acquire(['two', 'two', 'three'], shared=1), |
| 900 |
set(['two', 'two', 'three'])) |
| 901 |
self.ls.release(['two', 'two']) |
| 902 |
self.assertEquals(self.ls._list_owned(), set(['three'])) |
| 903 |
|
| 904 |
def testEmptyAcquire(self): |
| 905 |
# Acquire an empty list of locks...
|
| 906 |
self.assertEquals(self.ls.acquire([]), set()) |
| 907 |
self.assertEquals(self.ls._list_owned(), set()) |
| 908 |
# New locks can still be addded
|
| 909 |
self.assert_(self.ls.add('six')) |
| 910 |
# "re-acquiring" is not an issue, since we had really acquired nothing
|
| 911 |
self.assertEquals(self.ls.acquire([], shared=1), set()) |
| 912 |
self.assertEquals(self.ls._list_owned(), set()) |
| 913 |
# We haven't really acquired anything, so we cannot release
|
| 914 |
self.assertRaises(AssertionError, self.ls.release) |
| 915 |
|
| 916 |
def _doLockSet(self, names, shared): |
| 917 |
try:
|
| 918 |
self.ls.acquire(names, shared=shared)
|
| 919 |
self.done.put('DONE') |
| 920 |
self.ls.release()
|
| 921 |
except errors.LockError:
|
| 922 |
self.done.put('ERR') |
| 923 |
|
| 924 |
def _doAddSet(self, names): |
| 925 |
try:
|
| 926 |
self.ls.add(names, acquired=1) |
| 927 |
self.done.put('DONE') |
| 928 |
self.ls.release()
|
| 929 |
except errors.LockError:
|
| 930 |
self.done.put('ERR') |
| 931 |
|
| 932 |
def _doRemoveSet(self, names): |
| 933 |
self.done.put(self.ls.remove(names)) |
| 934 |
|
| 935 |
@_Repeat
|
| 936 |
def testConcurrentSharedAcquire(self): |
| 937 |
self.ls.acquire(['one', 'two'], shared=1) |
| 938 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 1)) |
| 939 |
self._waitThreads()
|
| 940 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 941 |
self._addThread(target=self._doLockSet, args=(['one', 'two', 'three'], 1)) |
| 942 |
self._waitThreads()
|
| 943 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 944 |
self._addThread(target=self._doLockSet, args=('three', 1)) |
| 945 |
self._waitThreads()
|
| 946 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 947 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 0)) |
| 948 |
self._addThread(target=self._doLockSet, args=(['two', 'three'], 0)) |
| 949 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 950 |
self.ls.release()
|
| 951 |
self._waitThreads()
|
| 952 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 953 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 954 |
|
| 955 |
@_Repeat
|
| 956 |
def testConcurrentExclusiveAcquire(self): |
| 957 |
self.ls.acquire(['one', 'two']) |
| 958 |
self._addThread(target=self._doLockSet, args=('three', 1)) |
| 959 |
self._waitThreads()
|
| 960 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 961 |
self._addThread(target=self._doLockSet, args=('three', 0)) |
| 962 |
self._waitThreads()
|
| 963 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 964 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 965 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 0)) |
| 966 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 1)) |
| 967 |
self._addThread(target=self._doLockSet, args=('one', 0)) |
| 968 |
self._addThread(target=self._doLockSet, args=('one', 1)) |
| 969 |
self._addThread(target=self._doLockSet, args=(['two', 'three'], 0)) |
| 970 |
self._addThread(target=self._doLockSet, args=(['two', 'three'], 1)) |
| 971 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 972 |
self.ls.release()
|
| 973 |
self._waitThreads()
|
| 974 |
for _ in range(6): |
| 975 |
self.failUnlessEqual(self.done.get_nowait(), 'DONE') |
| 976 |
|
| 977 |
@_Repeat
|
| 978 |
def testSimpleAcquireTimeoutExpiring(self): |
| 979 |
names = sorted(self.ls._names()) |
| 980 |
self.assert_(len(names) >= 3) |
| 981 |
|
| 982 |
# Get name of first lock
|
| 983 |
first = names[0]
|
| 984 |
|
| 985 |
# Get name of last lock
|
| 986 |
last = names.pop() |
| 987 |
|
| 988 |
checks = [ |
| 989 |
# Block first and try to lock it again
|
| 990 |
(first, first), |
| 991 |
|
| 992 |
# Block last and try to lock all locks
|
| 993 |
(None, first),
|
| 994 |
|
| 995 |
# Block last and try to lock it again
|
| 996 |
(last, last), |
| 997 |
] |
| 998 |
|
| 999 |
for (wanted, block) in checks: |
| 1000 |
# Lock in exclusive mode
|
| 1001 |
self.assert_(self.ls.acquire(block, shared=0)) |
| 1002 |
|
| 1003 |
def _AcquireOne(): |
| 1004 |
# Try to get the same lock again with a timeout (should never succeed)
|
| 1005 |
if self.ls.acquire(wanted, timeout=0.1, shared=0): |
| 1006 |
self.done.put("acquired") |
| 1007 |
self.ls.release()
|
| 1008 |
else:
|
| 1009 |
self.assert_(not self.ls._list_owned()) |
| 1010 |
self.assert_(not self.ls._is_owned()) |
| 1011 |
self.done.put("not acquired") |
| 1012 |
|
| 1013 |
self._addThread(target=_AcquireOne)
|
| 1014 |
|
| 1015 |
# Wait for timeout in thread to expire
|
| 1016 |
self._waitThreads()
|
| 1017 |
|
| 1018 |
# Release exclusive lock again
|
| 1019 |
self.ls.release()
|
| 1020 |
|
| 1021 |
self.assertEqual(self.done.get_nowait(), "not acquired") |
| 1022 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1023 |
|
| 1024 |
@_Repeat
|
| 1025 |
def testDelayedAndExpiringLockAcquire(self): |
| 1026 |
self._setUpLS()
|
| 1027 |
self.ls.add(['five', 'six', 'seven', 'eight', 'nine']) |
| 1028 |
|
| 1029 |
for expire in (False, True): |
| 1030 |
names = sorted(self.ls._names()) |
| 1031 |
self.assertEqual(len(names), 8) |
| 1032 |
|
| 1033 |
lock_ev = dict([(i, threading.Event()) for i in names]) |
| 1034 |
|
| 1035 |
# Lock all in exclusive mode
|
| 1036 |
self.assert_(self.ls.acquire(names, shared=0)) |
| 1037 |
|
| 1038 |
if expire:
|
| 1039 |
# We'll wait at least 300ms per lock
|
| 1040 |
lockwait = len(names) * [0.3] |
| 1041 |
|
| 1042 |
# Fail if we can't acquire all locks in 400ms. There are 8 locks, so
|
| 1043 |
# this gives us up to 2.4s to fail.
|
| 1044 |
lockall_timeout = 0.4
|
| 1045 |
else:
|
| 1046 |
# This should finish rather quickly
|
| 1047 |
lockwait = None
|
| 1048 |
lockall_timeout = len(names) * 5.0 |
| 1049 |
|
| 1050 |
def _LockAll(): |
| 1051 |
def acquire_notification(name): |
| 1052 |
if not expire: |
| 1053 |
self.done.put("getting %s" % name) |
| 1054 |
|
| 1055 |
# Kick next lock
|
| 1056 |
lock_ev[name].set() |
| 1057 |
|
| 1058 |
if self.ls.acquire(names, shared=0, timeout=lockall_timeout, |
| 1059 |
test_notify=acquire_notification): |
| 1060 |
self.done.put("got all") |
| 1061 |
self.ls.release()
|
| 1062 |
else:
|
| 1063 |
self.done.put("timeout on all") |
| 1064 |
|
| 1065 |
# Notify all locks
|
| 1066 |
for ev in lock_ev.values(): |
| 1067 |
ev.set() |
| 1068 |
|
| 1069 |
t = self._addThread(target=_LockAll)
|
| 1070 |
|
| 1071 |
for idx, name in enumerate(names): |
| 1072 |
# Wait for actual acquire on this lock to start
|
| 1073 |
lock_ev[name].wait(10.0)
|
| 1074 |
|
| 1075 |
if expire and t.isAlive(): |
| 1076 |
# Wait some time after getting the notification to make sure the lock
|
| 1077 |
# acquire will expire
|
| 1078 |
SafeSleep(lockwait[idx]) |
| 1079 |
|
| 1080 |
self.ls.release(names=name)
|
| 1081 |
|
| 1082 |
self.assert_(not self.ls._list_owned()) |
| 1083 |
|
| 1084 |
self._waitThreads()
|
| 1085 |
|
| 1086 |
if expire:
|
| 1087 |
# Not checking which locks were actually acquired. Doing so would be
|
| 1088 |
# too timing-dependant.
|
| 1089 |
self.assertEqual(self.done.get_nowait(), "timeout on all") |
| 1090 |
else:
|
| 1091 |
for i in names: |
| 1092 |
self.assertEqual(self.done.get_nowait(), "getting %s" % i) |
| 1093 |
self.assertEqual(self.done.get_nowait(), "got all") |
| 1094 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1095 |
|
| 1096 |
@_Repeat
|
| 1097 |
def testConcurrentRemove(self): |
| 1098 |
self.ls.add('four') |
| 1099 |
self.ls.acquire(['one', 'two', 'four']) |
| 1100 |
self._addThread(target=self._doLockSet, args=(['one', 'four'], 0)) |
| 1101 |
self._addThread(target=self._doLockSet, args=(['one', 'four'], 1)) |
| 1102 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 0)) |
| 1103 |
self._addThread(target=self._doLockSet, args=(['one', 'two'], 1)) |
| 1104 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1105 |
self.ls.remove('one') |
| 1106 |
self.ls.release()
|
| 1107 |
self._waitThreads()
|
| 1108 |
for i in range(4): |
| 1109 |
self.failUnlessEqual(self.done.get_nowait(), 'ERR') |
| 1110 |
self.ls.add(['five', 'six'], acquired=1) |
| 1111 |
self._addThread(target=self._doLockSet, args=(['three', 'six'], 1)) |
| 1112 |
self._addThread(target=self._doLockSet, args=(['three', 'six'], 0)) |
| 1113 |
self._addThread(target=self._doLockSet, args=(['four', 'six'], 1)) |
| 1114 |
self._addThread(target=self._doLockSet, args=(['four', 'six'], 0)) |
| 1115 |
self.ls.remove('five') |
| 1116 |
self.ls.release()
|
| 1117 |
self._waitThreads()
|
| 1118 |
for i in range(4): |
| 1119 |
self.failUnlessEqual(self.done.get_nowait(), 'DONE') |
| 1120 |
self.ls.acquire(['three', 'four']) |
| 1121 |
self._addThread(target=self._doRemoveSet, args=(['four', 'six'], )) |
| 1122 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1123 |
self.ls.remove('four') |
| 1124 |
self._waitThreads()
|
| 1125 |
self.assertEqual(self.done.get_nowait(), ['six']) |
| 1126 |
self._addThread(target=self._doRemoveSet, args=(['two'])) |
| 1127 |
self._waitThreads()
|
| 1128 |
self.assertEqual(self.done.get_nowait(), ['two']) |
| 1129 |
self.ls.release()
|
| 1130 |
# reset lockset
|
| 1131 |
self._setUpLS()
|
| 1132 |
|
| 1133 |
@_Repeat
|
| 1134 |
def testConcurrentSharedSetLock(self): |
| 1135 |
# share the set-lock...
|
| 1136 |
self.ls.acquire(None, shared=1) |
| 1137 |
# ...another thread can share it too
|
| 1138 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 1139 |
self._waitThreads()
|
| 1140 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1141 |
# ...or just share some elements
|
| 1142 |
self._addThread(target=self._doLockSet, args=(['one', 'three'], 1)) |
| 1143 |
self._waitThreads()
|
| 1144 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1145 |
# ...but not add new ones or remove any
|
| 1146 |
t = self._addThread(target=self._doAddSet, args=(['nine'])) |
| 1147 |
self._addThread(target=self._doRemoveSet, args=(['two'], )) |
| 1148 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1149 |
# this just releases the set-lock
|
| 1150 |
self.ls.release([])
|
| 1151 |
t.join(60)
|
| 1152 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1153 |
# release the lock on the actual elements so remove() can proceed too
|
| 1154 |
self.ls.release()
|
| 1155 |
self._waitThreads()
|
| 1156 |
self.failUnlessEqual(self.done.get_nowait(), ['two']) |
| 1157 |
# reset lockset
|
| 1158 |
self._setUpLS()
|
| 1159 |
|
| 1160 |
@_Repeat
|
| 1161 |
def testConcurrentExclusiveSetLock(self): |
| 1162 |
# acquire the set-lock...
|
| 1163 |
self.ls.acquire(None, shared=0) |
| 1164 |
# ...no one can do anything else
|
| 1165 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 1166 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
| 1167 |
self._addThread(target=self._doLockSet, args=(['three'], 0)) |
| 1168 |
self._addThread(target=self._doLockSet, args=(['two'], 1)) |
| 1169 |
self._addThread(target=self._doAddSet, args=(['nine'])) |
| 1170 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1171 |
self.ls.release()
|
| 1172 |
self._waitThreads()
|
| 1173 |
for _ in range(5): |
| 1174 |
self.assertEqual(self.done.get(True, 1), 'DONE') |
| 1175 |
# cleanup
|
| 1176 |
self._setUpLS()
|
| 1177 |
|
| 1178 |
@_Repeat
|
| 1179 |
def testConcurrentSetLockAdd(self): |
| 1180 |
self.ls.acquire('one') |
| 1181 |
# Another thread wants the whole SetLock
|
| 1182 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
| 1183 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 1184 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1185 |
self.assertRaises(AssertionError, self.ls.add, 'four') |
| 1186 |
self.ls.release()
|
| 1187 |
self._waitThreads()
|
| 1188 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1189 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1190 |
self.ls.acquire(None) |
| 1191 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
| 1192 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 1193 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1194 |
self.ls.add('four') |
| 1195 |
self.ls.add('five', acquired=1) |
| 1196 |
self.ls.add('six', acquired=1, shared=1) |
| 1197 |
self.assertEquals(self.ls._list_owned(), |
| 1198 |
set(['one', 'two', 'three', 'five', 'six'])) |
| 1199 |
self.assertEquals(self.ls._is_owned(), True) |
| 1200 |
self.assertEquals(self.ls._names(), |
| 1201 |
set(['one', 'two', 'three', 'four', 'five', 'six'])) |
| 1202 |
self.ls.release()
|
| 1203 |
self._waitThreads()
|
| 1204 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1205 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1206 |
self._setUpLS()
|
| 1207 |
|
| 1208 |
@_Repeat
|
| 1209 |
def testEmptyLockSet(self): |
| 1210 |
# get the set-lock
|
| 1211 |
self.assertEqual(self.ls.acquire(None), set(['one', 'two', 'three'])) |
| 1212 |
# now empty it...
|
| 1213 |
self.ls.remove(['one', 'two', 'three']) |
| 1214 |
# and adds/locks by another thread still wait
|
| 1215 |
self._addThread(target=self._doAddSet, args=(['nine'])) |
| 1216 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 1217 |
self._addThread(target=self._doLockSet, args=(None, 0)) |
| 1218 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1219 |
self.ls.release()
|
| 1220 |
self._waitThreads()
|
| 1221 |
for _ in range(3): |
| 1222 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1223 |
# empty it again...
|
| 1224 |
self.assertEqual(self.ls.remove(['nine']), ['nine']) |
| 1225 |
# now share it...
|
| 1226 |
self.assertEqual(self.ls.acquire(None, shared=1), set()) |
| 1227 |
# other sharers can go, adds still wait
|
| 1228 |
self._addThread(target=self._doLockSet, args=(None, 1)) |
| 1229 |
self._waitThreads()
|
| 1230 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1231 |
self._addThread(target=self._doAddSet, args=(['nine'])) |
| 1232 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1233 |
self.ls.release()
|
| 1234 |
self._waitThreads()
|
| 1235 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1236 |
self._setUpLS()
|
| 1237 |
|
| 1238 |
|
| 1239 |
class TestGanetiLockManager(_ThreadedTestCase): |
| 1240 |
|
| 1241 |
def setUp(self): |
| 1242 |
_ThreadedTestCase.setUp(self)
|
| 1243 |
self.nodes=['n1', 'n2'] |
| 1244 |
self.instances=['i1', 'i2', 'i3'] |
| 1245 |
self.GL = locking.GanetiLockManager(nodes=self.nodes, |
| 1246 |
instances=self.instances)
|
| 1247 |
|
| 1248 |
def tearDown(self): |
| 1249 |
# Don't try this at home...
|
| 1250 |
locking.GanetiLockManager._instance = None
|
| 1251 |
|
| 1252 |
def testLockingConstants(self): |
| 1253 |
# The locking library internally cheats by assuming its constants have some
|
| 1254 |
# relationships with each other. Check those hold true.
|
| 1255 |
# This relationship is also used in the Processor to recursively acquire
|
| 1256 |
# the right locks. Again, please don't break it.
|
| 1257 |
for i in range(len(locking.LEVELS)): |
| 1258 |
self.assertEqual(i, locking.LEVELS[i])
|
| 1259 |
|
| 1260 |
def testDoubleGLFails(self): |
| 1261 |
self.assertRaises(AssertionError, locking.GanetiLockManager) |
| 1262 |
|
| 1263 |
def testLockNames(self): |
| 1264 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
| 1265 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set(self.nodes)) |
| 1266 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), |
| 1267 |
set(self.instances)) |
| 1268 |
|
| 1269 |
def testInitAndResources(self): |
| 1270 |
locking.GanetiLockManager._instance = None
|
| 1271 |
self.GL = locking.GanetiLockManager()
|
| 1272 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
| 1273 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set()) |
| 1274 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), set()) |
| 1275 |
|
| 1276 |
locking.GanetiLockManager._instance = None
|
| 1277 |
self.GL = locking.GanetiLockManager(nodes=self.nodes) |
| 1278 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
| 1279 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set(self.nodes)) |
| 1280 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), set()) |
| 1281 |
|
| 1282 |
locking.GanetiLockManager._instance = None
|
| 1283 |
self.GL = locking.GanetiLockManager(instances=self.instances) |
| 1284 |
self.assertEqual(self.GL._names(locking.LEVEL_CLUSTER), set(['BGL'])) |
| 1285 |
self.assertEqual(self.GL._names(locking.LEVEL_NODE), set()) |
| 1286 |
self.assertEqual(self.GL._names(locking.LEVEL_INSTANCE), |
| 1287 |
set(self.instances)) |
| 1288 |
|
| 1289 |
def testAcquireRelease(self): |
| 1290 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 1291 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_CLUSTER), set(['BGL'])) |
| 1292 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i1']) |
| 1293 |
self.GL.acquire(locking.LEVEL_NODE, ['n1', 'n2'], shared=1) |
| 1294 |
self.GL.release(locking.LEVEL_NODE, ['n2']) |
| 1295 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), set(['n1'])) |
| 1296 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), set(['i1'])) |
| 1297 |
self.GL.release(locking.LEVEL_NODE)
|
| 1298 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), set()) |
| 1299 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), set(['i1'])) |
| 1300 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 1301 |
self.assertRaises(errors.LockError, self.GL.acquire, |
| 1302 |
locking.LEVEL_INSTANCE, ['i5'])
|
| 1303 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i3'], shared=1) |
| 1304 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), set(['i3'])) |
| 1305 |
|
| 1306 |
def testAcquireWholeSets(self): |
| 1307 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 1308 |
self.assertEquals(self.GL.acquire(locking.LEVEL_INSTANCE, None), |
| 1309 |
set(self.instances)) |
| 1310 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), |
| 1311 |
set(self.instances)) |
| 1312 |
self.assertEquals(self.GL.acquire(locking.LEVEL_NODE, None, shared=1), |
| 1313 |
set(self.nodes)) |
| 1314 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), |
| 1315 |
set(self.nodes)) |
| 1316 |
self.GL.release(locking.LEVEL_NODE)
|
| 1317 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 1318 |
self.GL.release(locking.LEVEL_CLUSTER)
|
| 1319 |
|
| 1320 |
def testAcquireWholeAndPartial(self): |
| 1321 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 1322 |
self.assertEquals(self.GL.acquire(locking.LEVEL_INSTANCE, None), |
| 1323 |
set(self.instances)) |
| 1324 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_INSTANCE), |
| 1325 |
set(self.instances)) |
| 1326 |
self.assertEquals(self.GL.acquire(locking.LEVEL_NODE, ['n2'], shared=1), |
| 1327 |
set(['n2'])) |
| 1328 |
self.assertEquals(self.GL._list_owned(locking.LEVEL_NODE), |
| 1329 |
set(['n2'])) |
| 1330 |
self.GL.release(locking.LEVEL_NODE)
|
| 1331 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 1332 |
self.GL.release(locking.LEVEL_CLUSTER)
|
| 1333 |
|
| 1334 |
def testBGLDependency(self): |
| 1335 |
self.assertRaises(AssertionError, self.GL.acquire, |
| 1336 |
locking.LEVEL_NODE, ['n1', 'n2']) |
| 1337 |
self.assertRaises(AssertionError, self.GL.acquire, |
| 1338 |
locking.LEVEL_INSTANCE, ['i3'])
|
| 1339 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 1340 |
self.GL.acquire(locking.LEVEL_NODE, ['n1']) |
| 1341 |
self.assertRaises(AssertionError, self.GL.release, |
| 1342 |
locking.LEVEL_CLUSTER, ['BGL'])
|
| 1343 |
self.assertRaises(AssertionError, self.GL.release, |
| 1344 |
locking.LEVEL_CLUSTER) |
| 1345 |
self.GL.release(locking.LEVEL_NODE)
|
| 1346 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i1', 'i2']) |
| 1347 |
self.assertRaises(AssertionError, self.GL.release, |
| 1348 |
locking.LEVEL_CLUSTER, ['BGL'])
|
| 1349 |
self.assertRaises(AssertionError, self.GL.release, |
| 1350 |
locking.LEVEL_CLUSTER) |
| 1351 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 1352 |
|
| 1353 |
def testWrongOrder(self): |
| 1354 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 1355 |
self.GL.acquire(locking.LEVEL_NODE, ['n2']) |
| 1356 |
self.assertRaises(AssertionError, self.GL.acquire, |
| 1357 |
locking.LEVEL_NODE, ['n1'])
|
| 1358 |
self.assertRaises(AssertionError, self.GL.acquire, |
| 1359 |
locking.LEVEL_INSTANCE, ['i2'])
|
| 1360 |
|
| 1361 |
# Helper function to run as a thread that shared the BGL and then acquires
|
| 1362 |
# some locks at another level.
|
| 1363 |
def _doLock(self, level, names, shared): |
| 1364 |
try:
|
| 1365 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 1366 |
self.GL.acquire(level, names, shared=shared)
|
| 1367 |
self.done.put('DONE') |
| 1368 |
self.GL.release(level)
|
| 1369 |
self.GL.release(locking.LEVEL_CLUSTER)
|
| 1370 |
except errors.LockError:
|
| 1371 |
self.done.put('ERR') |
| 1372 |
|
| 1373 |
@_Repeat
|
| 1374 |
def testConcurrency(self): |
| 1375 |
self.GL.acquire(locking.LEVEL_CLUSTER, ['BGL'], shared=1) |
| 1376 |
self._addThread(target=self._doLock, |
| 1377 |
args=(locking.LEVEL_INSTANCE, 'i1', 1)) |
| 1378 |
self._waitThreads()
|
| 1379 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1380 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i3']) |
| 1381 |
self._addThread(target=self._doLock, |
| 1382 |
args=(locking.LEVEL_INSTANCE, 'i1', 1)) |
| 1383 |
self._waitThreads()
|
| 1384 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1385 |
self._addThread(target=self._doLock, |
| 1386 |
args=(locking.LEVEL_INSTANCE, 'i3', 1)) |
| 1387 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1388 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 1389 |
self._waitThreads()
|
| 1390 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1391 |
self.GL.acquire(locking.LEVEL_INSTANCE, ['i2'], shared=1) |
| 1392 |
self._addThread(target=self._doLock, |
| 1393 |
args=(locking.LEVEL_INSTANCE, 'i2', 1)) |
| 1394 |
self._waitThreads()
|
| 1395 |
self.assertEqual(self.done.get_nowait(), 'DONE') |
| 1396 |
self._addThread(target=self._doLock, |
| 1397 |
args=(locking.LEVEL_INSTANCE, 'i2', 0)) |
| 1398 |
self.assertRaises(Queue.Empty, self.done.get_nowait) |
| 1399 |
self.GL.release(locking.LEVEL_INSTANCE)
|
| 1400 |
self._waitThreads()
|
| 1401 |
self.assertEqual(self.done.get(True, 1), 'DONE') |
| 1402 |
self.GL.release(locking.LEVEL_CLUSTER, ['BGL']) |
| 1403 |
|
| 1404 |
|
| 1405 |
if __name__ == '__main__': |
| 1406 |
unittest.main() |
| 1407 |
#suite = unittest.TestLoader().loadTestsFromTestCase(TestSharedLock)
|
| 1408 |
#unittest.TextTestRunner(verbosity=2).run(suite)
|