Enum PersistentBackendKind 

pub enum PersistentBackendKind {
    Redb,
}

Selects which persistent L2 cache backend to use at runtime.

When exactly one persistent feature is compiled in, the backend is deduced automatically and this field can be left as None in CacheConfig. When several features are enabled simultaneously, the caller must set CacheConfig::persistent_backend explicitly; leaving it as None causes CacheLayer::from_config to return Error::AmbiguousCacheBackend.

Variants

Redb

Embedded redb backend (cache-redb feature).

Implementations

impl PersistentBackendKind

pub fn resolve(kind: Option<Self>) -> Result<Self>

Resolves the backend to use.

Arguments

• kind - An explicit selection, or None to auto-detect.

Errors

Returns Error::AmbiguousCacheBackend when kind is None and more than one persistent feature is compiled in.

Returns

The resolved PersistentBackendKind.

Trait Implementations

impl Clone for PersistentBackendKind

fn clone(&self) -> PersistentBackendKind

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for PersistentBackendKind

impl Debug for PersistentBackendKind

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for PersistentBackendKind

Available on persistent_cache only.

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for PersistentBackendKind

impl Hash for PersistentBackendKind

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for PersistentBackendKind

fn eq(&self, other: &PersistentBackendKind) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for PersistentBackendKind