Query caching

glQiwiApi provides builtin cache storage and cache invalidation strategies such a InMemoryCacheStorage and APIResponsesCacheInvalidationStrategy accordingly. Obviously, you can extend functionality of library and add, for example, Redis based cache storage.

Tip

By default InMemoryCacheStorage use UnrealizedCacheInvalidationStrategy as an invalidation strategy

Straightforward example

import asyncio

from glQiwiApi.core.cache import InMemoryCacheStorage

storage = InMemoryCacheStorage()  # here is UnrealizedCacheInvalidationStrategy as an invalidation strategy


async def cache():
    await storage.update(cached=5)
    cached = await storage.retrieve("cached")
    print(f"You have cached {cached}")


asyncio.run(cache())

Advanced usage

This very cache invalidation by timer strategy is worth using if you want to achieve cache invalidation. It should be noted that previous UnrealizedCacheInvalidationStrategy just ignores the invalidation and don’t get rid of aged cache.

import asyncio

from glQiwiApi.core.cache import InMemoryCacheStorage, CacheInvalidationByTimerStrategy

storage = InMemoryCacheStorage(CacheInvalidationByTimerStrategy(cache_time_in_seconds=1))


async def main():
    await storage.update(x=5)

    await asyncio.sleep(1)

    value = await storage.retrieve("x")  # None


asyncio.run(main())