Struct MemoryBackend 

pub struct MemoryBackend<K, V, M = ()>
where
    K: StorageKey,
    V: StorageValue,
    M: StorageMeta,
{ /* private fields */ }

In-memory storage backend

Implementations

impl<K, V, M> MemoryBackend<K, V, M>

where K: StorageKey, V: StorageValue, M: StorageMeta,

pub fn new() -> Self

Create a new memory backend

Trait Implementations

impl<K, V, M> Clone for MemoryBackend<K, V, M>

where K: StorageKey, V: StorageValue, M: StorageMeta,

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K, V, M> Default for MemoryBackend<K, V, M>

where K: StorageKey, V: StorageValue, M: StorageMeta,

fn default() -> Self

Returns the “default value” for a type.

impl<K, V, M> StorageBackend for MemoryBackend<K, V, M>

where K: StorageKey, V: StorageValue, M: StorageMeta,

type Key = K

Key type for the storage

type Value = V

Value type for the storage

type Metadata = M

Metadata type for entries

fn save<'life0, 'life1, 'async_trait>( &'life0 self, entries: &'life1 EntryMap<K, V, M>, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

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

Save entries to storage

fn load<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<EntryMap<K, V, M>>> + Send + 'async_trait>>

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

Load entries from storage

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

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

Remove entries for a specific key

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

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

Clear all entries from storage

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

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

Check if storage contains a key

fn size_bytes<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<u64>> + Send + 'async_trait>>

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

Get approximate size of storage in bytes

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

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

Compact storage (optional operation for backends that support it)