Trait CacheStore 

pub trait CacheStore:
    Send
    + Sync
    + 'static {
    // Required methods
    fn get<'a>(&'a self, key: &'a str) -> BoxFuture<'a, Result<Option<Vec<u8>>>>;
    fn set(
        &self,
        key: String,
        value: Vec<u8>,
        ttl: Option<Duration>,
    ) -> BoxFuture<'_, Result<()>>;
    fn delete<'a>(&'a self, key: &'a str) -> BoxFuture<'a, Result<()>>;
    fn clear(&self) -> BoxFuture<'_, Result<()>>;
}

A cache backend that stores opaque byte values under string keys.

The Cache handle serializes typed values to bytes and talks to a store through this trait, so any backend (in-memory, Redis) works the same from a handler’s point of view. The trait is object-safe: a [Cache] holds an Arc<dyn CacheStore>.

TTL convention: None keeps the entry until the store evicts it (no explicit expiry); Some(duration) expires the entry after duration. A zero duration is normalized to None (“never expire”) by the Cache handle before it reaches the store.

Required Methods

fn get<'a>(&'a self, key: &'a str) -> BoxFuture<'a, Result<Option<Vec<u8>>>>

Returns the bytes stored under key, or None if absent or expired.

fn set( &self, key: String, value: Vec<u8>, ttl: Option<Duration>, ) -> BoxFuture<'_, Result<()>>

Stores value under key, expiring it after ttl when set.

fn delete<'a>(&'a self, key: &'a str) -> BoxFuture<'a, Result<()>>

Removes the entry under key, if any.

fn clear(&self) -> BoxFuture<'_, Result<()>>

Removes every entry from the store.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl CacheStore for MemoryStore