31 lines
1.0 KiB
Python
31 lines
1.0 KiB
Python
"""Cache for commonly shared data that is intended to be immutable."""
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from __future__ import annotations
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import typing as t
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from .config import (
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CommonConfig,
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)
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TValue = t.TypeVar('TValue')
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class CommonCache:
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"""Common cache."""
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def __init__(self, args): # type: (CommonConfig) -> None
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self.args = args
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def get(self, key, factory): # type: (str, t.Callable[[], TValue]) -> TValue
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"""Return the value from the cache identified by the given key, using the specified factory method if it is not found."""
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if key not in self.args.cache:
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self.args.cache[key] = factory()
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return self.args.cache[key]
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def get_with_args(self, key, factory): # type: (str, t.Callable[[CommonConfig], TValue]) -> TValue
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"""Return the value from the cache identified by the given key, using the specified factory method (which accepts args) if it is not found."""
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if key not in self.args.cache:
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self.args.cache[key] = factory(self.args)
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return self.args.cache[key]
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