ad842ee8a5
- Added type hinting (for now, 3.5-compatible) - Split `db` namespace into `db` module and `model` namespace - Changed elastic search to be created lazily for each operation - Changed to class based approach in entity serialization to allow stronger typing - Removed `required` argument from `context.get_*` family of functions; now it's implied if `default` argument is omitted - Changed `unalias_dict` implementation to use less magic inputs
65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
from typing import Any, List, Dict
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from datetime import datetime
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class LruCacheItem:
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def __init__(self, key: object, value: Any) -> None:
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self.key = key
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self.value = value
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self.timestamp = datetime.utcnow()
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class LruCache:
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def __init__(self, length: int) -> None:
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self.length = length
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self.hash = {} # type: Dict[object, LruCacheItem]
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self.item_list = [] # type: List[LruCacheItem]
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def insert_item(self, item: LruCacheItem) -> None:
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if item.key in self.hash:
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item_index = next(
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i
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for i, v in enumerate(self.item_list)
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if v.key == item.key)
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self.item_list[:] \
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= self.item_list[:item_index] \
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+ self.item_list[item_index + 1:]
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self.item_list.insert(0, item)
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else:
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if len(self.item_list) > self.length:
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self.remove_item(self.item_list[-1])
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self.hash[item.key] = item
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self.item_list.insert(0, item)
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def remove_all(self) -> None:
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self.hash = {}
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self.item_list = []
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def remove_item(self, item: LruCacheItem) -> None:
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del self.hash[item.key]
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del self.item_list[self.item_list.index(item)]
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_CACHE = LruCache(length=100)
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def purge() -> None:
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_CACHE.remove_all()
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def has(key: object) -> bool:
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return key in _CACHE.hash
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def get(key: object) -> Any:
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return _CACHE.hash[key].value
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def remove(key: object) -> None:
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if has(key):
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del _CACHE.hash[key]
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def put(key: object, value: Any) -> None:
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_CACHE.insert_item(LruCacheItem(key, value))
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