Struct InMemoryStore 

pub struct InMemoryStore<K, V>
where
    K: Eq + Hash + Clone,
    V: Clone,
{ /* private fields */ }

A simple in-memory BackingStore backed by a HashMap.

Useful for testing and as a reference implementation.

Implementations

impl<K, V> InMemoryStore<K, V>

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

pub fn new() -> Self

Create an unbounded in-memory store.

pub fn with_capacity(max_entries: usize) -> Self

Create an in-memory store with a hard capacity limit.

pub fn len(&self) -> usize

Number of entries currently in the store.

pub fn is_empty(&self) -> bool

Returns true when the store contains no entries.

pub fn write_count(&self) -> u64

Total number of write operations performed.

pub fn read_count(&self) -> u64

Total number of read operations performed.

Trait Implementations

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

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

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.

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

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

fn clone(&self) -> InMemoryStore<K, V>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

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

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

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

Formats the value using the given formatter.

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

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

fn default() -> InMemoryStore<K, V>

Returns the “default value” for a type.