Struct TimedCache

pub struct TimedCache<Key: Hash + Eq + Clone, Value> { /* private fields */ }

A collection which stores a value for a set amount of time.

Each stored value will keep track of when it was stored, and once the value has been considered valid for the specified length of time, it will be re-generated using the generator function provided when attempting to retrieve a value using TimedCache::get.

Implementations

impl<Key: Hash + Eq + Clone, Value> TimedCache<Key, Value>

pub fn with_time_to_keep(time_to_keep: Duration) -> TimedCache<Key, Value>

Creates a TimedCache with the specified Duration as the length of time the values will be considered ‘valid’ after initial storage.

pub fn get(&mut self, key: &Key, generate_value: impl Fn() -> Value) -> &Value

Retrieves a reference to the value stored in the cache for the key if it exists and is still considered valid, otherwise calls generate_value to generate the value to store in the cache and returns a reference to that value.