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24 lines
915 B
Python
24 lines
915 B
Python
import threading
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from datetime import timedelta
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from requests_cache import CachedSession
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# Cache for "semi-static" data retrieved from a URL. This is a layet of caching in addition to the normal caching of
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# spots, alerts and other data in the DataStore class. Its purpose is to avoid hitting remote endpoints frequently when
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# e.g. restarting Spothole many times during testing.
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_session = CachedSession("cache/semi_static_urls", expire_after=timedelta(days=1),
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allowable_codes=(200, 400, 401, 403, 404))
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_lock = threading.Lock()
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class _ThreadSafeSession:
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"""Wraps CachedSession with a lock to prevent concurrent SQLite access across threads. This allows a single object
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to be used freely across the application."""
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def get(self, *args, **kwargs):
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with _lock:
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return _session.get(*args, **kwargs)
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# Global object
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URL_DATA_CACHE = _ThreadSafeSession()
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