Struct Cache 

pub struct Cache;

Implementations

impl Cache

pub async fn get<T: DeserializeOwned>( key: &str, ) -> Result<Option<T>, CacheError>

Retrieve a cached value. Returns None on miss or expiry.

pub async fn set<T: Serialize>( key: &str, value: &T, ttl: Option<Duration>, ) -> Result<(), CacheError>

Store a value. ttl = None means no expiry.

pub async fn forget(key: &str) -> Result<(), CacheError>

Remove a key.

pub async fn flush() -> Result<(), CacheError>

Remove all keys (scoped to the current database / memory store).

pub async fn remember<T, F, Fut, E>( key: &str, ttl: Duration, f: F, ) -> Result<T, CacheError>

where T: Serialize + DeserializeOwned + Send, F: FnOnce() -> Fut, Fut: Future<Output = Result<T, E>>, E: Display,

Return the cached value if present; otherwise call f, store the result for ttl, and return it.

The fallback closure may return any error type that implements Display — it is converted to CacheError::Fetch.