Have you considered a get_with_ttl or a get_and_refresh function?

[juancgalvis]

I have a scenario where I have items with a TTL (Time To Live). Each item has a TTL of 5 minutes when inserted. Every time I read the item, if it's cached, I also get the TTL, and if the TTL is less than 30 seconds, I perform a refresh. In this case, I read both the value and the TTL. Would it be optimal to have both values ​​in a new function, Cachex.get_with_ttl?

# The put
Cachex.put(:my_cache, "key", "value", expire: :timer.minutes(5))

# In another code location after unspecified time
case Cachex.get(:my_cache, "key") do
  {:ok, value} when value != nil ->
    {:ok, ttl} = Cachex.ttl(:my_cache, "key")

    if ttl < 30_000 do
      Cachex.refresh(:my_cache, "key")
    end

    value

  _other ->
    :not_found
end

The key and value are hardcoded to show a sample.

or even implement a function with the logic to perform the refresh:

get_and_refresh(:my_cache, "key", min_ttl: 30_000)

[whitfin]

Hi @juancgalvis!

I think this is too specific a pattern to add an API for it.

I'm not sure what the point is of the "if the TTL is less than 30 seconds"; why not just refresh regardless of that? The call is very cheap, if it's a concern of cache writes.

You could also consider writing a hook for this, rather than inlining it into your calls (if you prefer!).