How can I run a function every time cache is invalidated for a certain endpoint?

[LoyalPotato]

Hey,

So basically, if I have an endpoint with some cached data and after the keepUnusedDataFor timer runs out and the cache is cleaned, is there a way for me to "listen" to whenever, before or after, the cache is deleted?

[markerikson]

Not directly. What are you trying to accomplish?

[markerikson]

Hmm. Maybe using the https://redux-toolkit.js.org/rtk-query/api/createApi#oncacheentryadded lifecycle in that endpoint, and then waiting for the cache entry to be removed?

[LoyalPotato]

By waiting you mean using a timer with the same wait time as the keepUnusedDataFor? Just to clear any doubt as to what you mean :)

[markerikson]

No, I mean await cacheEntryRemoved, like in https://redux-toolkit.js.org/rtk-query/usage/streaming-updates#websocket-chat-api .

However, I'm a little confused on what you actually want to accomplish. You mentioned cache entries being removed, and invalidateTags, and these are different tools. Are you wanting to refetch the other data, or remove it entirely? We don't currently have an API to flat-out remove a cache entry manually, although it's come up a few times ( #2820 ).

[LoyalPotato]

Oh yeah, sorry, I was reading it now and saw what you mentioned. My bad!

[LoyalPotato]

I'm sorry for not explaining correctly, but I think what you mentioned might be what I want.
I just want to know when the cache for each endpoint + args is removed so that I can then manage my local cache (not related to RTKQ but to the data stored when making the request using RTKQ).