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4fad8efbfb
1. make it not blow out the stack when there are more than 50 things waiting for a lock. Fixes https://github.com/matrix-org/synapse/issues/2505. 2. Make it not mess up the log contexts.
65 lines
1.9 KiB
Python
65 lines
1.9 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from synapse.util import async, logcontext
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from tests import unittest
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from twisted.internet import defer
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from synapse.util.async import Linearizer
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class LinearizerTestCase(unittest.TestCase):
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@defer.inlineCallbacks
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def test_linearizer(self):
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linearizer = Linearizer()
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key = object()
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d1 = linearizer.queue(key)
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cm1 = yield d1
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d2 = linearizer.queue(key)
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self.assertFalse(d2.called)
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with cm1:
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self.assertFalse(d2.called)
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with (yield d2):
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pass
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def test_lots_of_queued_things(self):
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# we have one slow thing, and lots of fast things queued up behind it.
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# it should *not* explode the stack.
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linearizer = Linearizer()
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@defer.inlineCallbacks
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def func(i, sleep=False):
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with logcontext.LoggingContext("func(%s)" % i) as lc:
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with (yield linearizer.queue("")):
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self.assertEqual(
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logcontext.LoggingContext.current_context(), lc)
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if sleep:
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yield async.sleep(0)
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self.assertEqual(
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logcontext.LoggingContext.current_context(), lc)
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func(0, sleep=True)
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for i in xrange(1, 100):
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func(i)
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return func(1000)
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