Struct CacheBackend 

pub struct CacheBackend<K, V>
where
    K: Clone + Eq + Hash + Ord + Debug + Send + 'static,
    V: Clone + Debug + Send + 'static,
{ /* private fields */ }

Backend to keep and manage stored entries.

A backend might remove entries at any point, e.g. due to memory pressure or expiration.

Implementations

impl<K, V> CacheBackend<K, V>

where K: Clone + Eq + Hash + Ord + Debug + Send + 'static, V: Clone + Debug + Send + 'static,

pub fn new(policy: impl CachePolicy<K = K, V = V>) -> Self

pub fn get(&mut self, k: &K) -> Option<V>

Get value for given key if it exists.

pub fn peek(&mut self, k: &K) -> Option<V>

Peek value for given key if it exists.

In contrast to get this will only return a value if there is a stored value. This will not change the cache contents.

pub fn put(&mut self, k: K, v: V) -> Option<V>

Put value for given key.

If a key already exists, its old value will be returned.

pub fn remove(&mut self, k: &K) -> Option<V>

Remove value for given key.

If a key does not exist, none will be returned.

Trait Implementations

impl<K, V> Debug for CacheBackend<K, V>

where K: Clone + Eq + Hash + Ord + Debug + Send + 'static + Debug, V: Clone + Debug + Send + 'static + Debug,

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

Formats the value using the given formatter.