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https://github.com/blockchain-etl/ethereum-etl.git
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39 lines
1.6 KiB
Python
39 lines
1.6 KiB
Python
# MIT License
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#
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# Copyright (c) 2018 Evgeny Medvedev, evge.medvedev@gmail.com
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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import threading
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class ThreadLocalProxy:
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def __init__(self, delegate_factory):
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self._thread_local = threading.local()
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self._delegate_factory = delegate_factory
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def __getattr__(self, name):
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return getattr(self._get_thread_local_delegate(), name)
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def _get_thread_local_delegate(self):
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if getattr(self._thread_local, '_delegate', None) is None:
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self._thread_local._delegate = self._delegate_factory()
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return self._thread_local._delegate
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