Mercurial > p > roundup > code
annotate roundup/test/mocknull.py @ 6565:2c2dbfc332ba
Try to handle multiple connections better.
The session database is a hot spot. When multiple requests (e.g. 20)
come in at the same time session database contention can get great.
The original code didn't retry session database access when the open
failed. This resulted in errors at the client.
The second pass delayed 0.01 seconds and retried. It was better but we
still had multiple second stalls. I think the first request got in,
everybody else backed up and then retried at the same time. Again they
stepped on each other. With logging I would see many counters go all
the way to low single digits or to -1 indicating falure.
This pass uses randomint to generate delays from 0-.125 seconds in 5ms
increments. This performs better in testing. I rarely saw a counter
less than 13 (2 failed retries). Current logging starts after 6
failures and counts down until success or failure.
| author | John Rouillard <rouilj@ieee.org> |
|---|---|
| date | Thu, 16 Dec 2021 20:02:00 -0500 |
| parents | f2c31f5ec50b |
| children | 617d85ce4ac3 |
| rev | line source |
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1 |
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2 class MockNull: |
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3 def __init__(self, **kwargs): |
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4 for key, value in kwargs.items(): |
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5 self.__dict__[key] = value |
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6 |
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7 def __call__(self, *args, **kwargs): return MockNull() |
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8 def __getattr__(self, name): |
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9 # This allows assignments which assume all intermediate steps are Null |
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10 # objects if they don't exist yet. |
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11 # |
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12 # For example (with just 'client' defined): |
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13 # |
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14 # client.db.config.TRACKER_WEB = 'BASE/' |
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15 self.__dict__[name] = MockNull() |
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16 return getattr(self, name) |
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17 |
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18 def __getitem__(self, key): return self |
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19 def __bool__(self): return False |
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20 # Python 2 compatibility: |
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21 __nonzero__ = __bool__ |
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22 def __contains__(self, key): return False |
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23 def __eq__(self, rhs): return False |
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24 def __ne__(self, rhs): return False |
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25 def __str__(self): return '' |
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26 def __repr__(self): return '<MockNull 0x%x>'%id(self) |
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27 def gettext(self, str): return str |
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28 _ = gettext |
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29 def get(self, name, default=None): |
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30 try: |
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31 return self.__dict__[name.lower()] |
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32 except KeyError: |
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33 return default |
