Trait BackingStore 

pub trait BackingStore<K, V> {
    // Required methods
    fn store(&mut self, key: &K, value: &V) -> Result<(), StoreError>;
    fn load(&self, key: &K) -> Option<V>;
    fn remove(&mut self, key: &K) -> bool;
}

Abstraction over a synchronous persistent store.

Implementations are expected to be synchronous. For async I/O the caller can provide a blocking adapter.

Required Methods

fn store(&mut self, key: &K, value: &V) -> Result<(), StoreError>

Persist (key, value) to the backing store.

fn load(&self, key: &K) -> Option<V>

Load the value associated with key, returning None if absent.

fn remove(&mut self, key: &K) -> bool

Remove key from the backing store.

Returns true if the key existed and was removed.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl<K, V> BackingStore<K, V> for InMemoryStore<K, V>

where K: Eq + Hash + Clone, V: Clone,