root / test / ganeti.workerpool_unittest.py @ 25e557a5
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#!/usr/bin/python
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#
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# Copyright (C) 2008 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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# 02110-1301, USA.
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"""Script for unittesting the workerpool module"""
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import unittest |
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import threading |
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import time |
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import sys |
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import zlib |
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from ganeti import workerpool |
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import testutils |
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class CountingContext(object): |
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def __init__(self): |
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self._lock = threading.Condition(threading.Lock())
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self.done = 0 |
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def DoneTask(self): |
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self._lock.acquire()
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try:
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self.done += 1 |
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finally:
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self._lock.release()
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def GetDoneTasks(self): |
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self._lock.acquire()
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try:
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return self.done |
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finally:
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self._lock.release()
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@staticmethod
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def UpdateChecksum(current, value): |
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return zlib.adler32(str(value), current) |
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class CountingBaseWorker(workerpool.BaseWorker): |
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def RunTask(self, ctx, text): |
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ctx.DoneTask() |
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class ChecksumContext: |
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CHECKSUM_START = zlib.adler32("")
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def __init__(self): |
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self.lock = threading.Condition(threading.Lock())
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self.checksum = self.CHECKSUM_START |
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@staticmethod
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def UpdateChecksum(current, value): |
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return zlib.adler32(str(value), current) |
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class ChecksumBaseWorker(workerpool.BaseWorker): |
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def RunTask(self, ctx, number): |
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ctx.lock.acquire() |
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try:
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ctx.checksum = ctx.UpdateChecksum(ctx.checksum, number) |
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finally:
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ctx.lock.release() |
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class TestWorkerpool(unittest.TestCase): |
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"""Workerpool tests"""
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def testCounting(self): |
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ctx = CountingContext() |
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wp = workerpool.WorkerPool("Test", 3, CountingBaseWorker) |
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try:
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self._CheckWorkerCount(wp, 3) |
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for i in range(10): |
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wp.AddTask(ctx, "Hello world %s" % i)
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wp.Quiesce() |
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finally:
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wp.TerminateWorkers() |
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self._CheckWorkerCount(wp, 0) |
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self.assertEquals(ctx.GetDoneTasks(), 10) |
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def testNoTasks(self): |
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wp = workerpool.WorkerPool("Test", 3, CountingBaseWorker) |
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try:
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self._CheckWorkerCount(wp, 3) |
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self._CheckNoTasks(wp)
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finally:
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wp.TerminateWorkers() |
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self._CheckWorkerCount(wp, 0) |
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def testNoTasksQuiesce(self): |
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wp = workerpool.WorkerPool("Test", 3, CountingBaseWorker) |
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try:
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self._CheckWorkerCount(wp, 3) |
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self._CheckNoTasks(wp)
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wp.Quiesce() |
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self._CheckNoTasks(wp)
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finally:
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wp.TerminateWorkers() |
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self._CheckWorkerCount(wp, 0) |
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def testChecksum(self): |
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# Tests whether all tasks are run and, since we're only using a single
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# thread, whether everything is started in order.
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wp = workerpool.WorkerPool("Test", 1, ChecksumBaseWorker) |
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try:
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self._CheckWorkerCount(wp, 1) |
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ctx = ChecksumContext() |
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checksum = ChecksumContext.CHECKSUM_START |
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for i in range(1, 100): |
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checksum = ChecksumContext.UpdateChecksum(checksum, i) |
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wp.AddTask(ctx, i) |
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wp.Quiesce() |
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self._CheckNoTasks(wp)
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# Check sum
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ctx.lock.acquire() |
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try:
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self.assertEqual(checksum, ctx.checksum)
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finally:
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ctx.lock.release() |
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finally:
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wp.TerminateWorkers() |
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self._CheckWorkerCount(wp, 0) |
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def testAddManyTasks(self): |
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ctx = CountingContext() |
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wp = workerpool.WorkerPool("Test", 3, CountingBaseWorker) |
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try:
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self._CheckWorkerCount(wp, 3) |
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wp.AddManyTasks([(ctx, "Hello world %s" % i, ) for i in range(10)]) |
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wp.AddTask(ctx, "A separate hello")
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wp.AddTask(ctx, "Once more, hi!")
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wp.AddManyTasks([(ctx, "Hello world %s" % i, ) for i in range(10)]) |
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wp.Quiesce() |
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self._CheckNoTasks(wp)
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finally:
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wp.TerminateWorkers() |
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self._CheckWorkerCount(wp, 0) |
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self.assertEquals(ctx.GetDoneTasks(), 22) |
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def testManyTasksSequence(self): |
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ctx = CountingContext() |
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wp = workerpool.WorkerPool("Test", 3, CountingBaseWorker) |
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try:
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self._CheckWorkerCount(wp, 3) |
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self.assertRaises(AssertionError, wp.AddManyTasks, |
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["Hello world %s" % i for i in range(10)]) |
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self.assertRaises(AssertionError, wp.AddManyTasks, |
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[i for i in range(10)]) |
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wp.AddManyTasks([(ctx, "Hello world %s" % i, ) for i in range(10)]) |
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wp.AddTask(ctx, "A separate hello")
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wp.Quiesce() |
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self._CheckNoTasks(wp)
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finally:
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wp.TerminateWorkers() |
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self._CheckWorkerCount(wp, 0) |
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self.assertEquals(ctx.GetDoneTasks(), 11) |
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def _CheckNoTasks(self, wp): |
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wp._lock.acquire() |
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try:
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# The task queue must be empty now
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self.failUnless(not wp._tasks) |
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finally:
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wp._lock.release() |
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def _CheckWorkerCount(self, wp, num_workers): |
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wp._lock.acquire() |
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try:
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self.assertEqual(len(wp._workers), num_workers) |
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finally:
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wp._lock.release() |
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if __name__ == '__main__': |
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testutils.GanetiTestProgram() |