Source code for arpoc.cache

""" Cache Module for OIDCPROXY"""

import collections
import heapq
from dataclasses import dataclass, field
from typing import Any, List

import arpoc.utils

[docs]@dataclass(order=True) class CacheItem: """ CacheItem -- A item in the Cache timestamp: An Unix Timestamp in seconds since beginning of the epoch. item: The Item """ timestamp: int item: Any = field(compare=False)
[docs]class Cache(collections.UserDict): """ The cache. On Every action (get, put) a clean up procedure is triggered """ def __init__(self) -> None: super().__init__({}) self.__valid: List = []
[docs] def expire(self) -> None: """ Deletes invalid entries from the cache""" while len( self.__valid) > 0 and self.__valid[0].timestamp < elem = heapq.heappop(self.__valid) if elem.item in del[elem.item]
[docs] def put(self, key: str, data: Any, valid: int) -> None: """ Inserts the element <data> with <key> into the cache. Expiration time <valid>. """ self.expire() if key in raise Exception[key] = data heapq.heappush(self.__valid, CacheItem(valid, key))
def __getitem__(self, key: str) -> Any: self.expire() return[key]
[docs] def get(self, key: str, default: Any = None) -> Any: """ Returns the element in the cache referenced by key. If no element exists with the key, <default> is returned """ try: return self[key] except KeyError: return default