[FEATURE] Invalidate complete cache

[kelko]

Problem

internal caches of a ASP.NET WebAPI need to be invalidated in certain conditions (externally triggered). Cache Invalidation per key (cache.Remove(key)) is not suitable, we don't know all keys up front.

Solution

per (named) cache a method to remove / invalidate all entries of the whole cache, on all levels

Alternatives

Additional book-keeping to track all cache keys created, so they can be removed each one individually

Additional context

.NET 7 ASP.NET WebAPI using FusionCache via DI

[jodydonetti]

Hi @kelko and thanks for using FusionCache!

What you are looking for is normally referred to as a Clear() method, and has been requested multiple times like here or here: there you can read the rationale behind not having such a method (and now with Named Caches and Cache Key Prefix even more).

In particular in the second link you can see a potential solution which may be useful to you.

Hope this helps.