apiplant-cache

An optional Redis cache, for functions to use.

Nothing in the framework caches through it. Resources, permissions, hooks and the admin manifest behave identically whether or not a cache is configured, and that is deliberate: a cache in front of CRUD would have to guess when a row changes, and guessing wrong means serving stale data through an API that never said it might. What a cache is good for is the work a function does — a third-party response worth memoising, a rate-limit counter, a one-time token with a natural expiry — and that is work only the function author can invalidate correctly.

So the cache is exposed, deliberately, only through a function's Context:

[cache]
url = "redis://127.0.0.1:6379"
prefix = "my-app:"

if let Some(hit) = ctx.cache_get("rates:eur")? { return Ok(hit); }
let rates = fetch_rates()?;
ctx.cache_set("rates:eur", &rates, Some(900))?;

Failing soft

A cache that is down is not an outage. Every operation here returns a [Result], and the host reports failures to the function rather than to the caller — a function that treats a miss and an error alike keeps working when Redis is restarted, which is the whole point of the data being disposable.