Struct InMemoryBackend

pub struct InMemoryBackend;

An in-memory backend that doesn’t persist data.

This backend is useful for testing or when persistence is not needed.

Implementations

impl InMemoryBackend

pub const fn new() -> Self

Creates a new in-memory backend.

Examples

use persistent_map::in_memory::InMemoryBackend;

let backend = InMemoryBackend::new();

Trait Implementations

impl Debug for InMemoryBackend

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

Formats the value using the given formatter.

impl Default for InMemoryBackend

fn default() -> InMemoryBackend

Returns the “default value” for a type.

impl<K, V> StorageBackend<K, V> for InMemoryBackend

where K: Eq + Hash + Clone + Serialize + DeserializeOwned + Send + Sync + 'static, V: Clone + Serialize + DeserializeOwned + Send + Sync + 'static,

fn load_all<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<HashMap<K, V>, PersistentError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Load all key-value pairs from the storage backend.

fn save<'life0, 'async_trait>( &'life0 self, _key: K, _value: V, ) -> Pin<Box<dyn Future<Output = Result<(), PersistentError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Save a key-value pair to the storage backend.

fn delete<'life0, 'life1, 'async_trait>( &'life0 self, _key: &'life1 K, ) -> Pin<Box<dyn Future<Output = Result<(), PersistentError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Delete a key-value pair from the storage backend.

fn flush<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<(), PersistentError>> + Send + 'async_trait>>

where Self: Sync + 'async_trait, 'life0: 'async_trait,

Flush any buffered writes to the storage backend.

fn contains_key<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 K, ) -> Pin<Box<dyn Future<Output = Result<bool, PersistentError>> + Send + 'async_trait>>

where Self: Sync + 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Check if a key exists in the storage backend.

fn len<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<usize, PersistentError>> + Send + 'async_trait>>

where Self: Sync + 'async_trait, 'life0: 'async_trait,

Get the number of key-value pairs in the storage backend.

fn is_empty<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<bool, PersistentError>> + Send + 'async_trait>>

where Self: Sync + 'async_trait, 'life0: 'async_trait,

Check if the storage backend is empty.