Struct KvStateBackend 

pub struct KvStateBackend { /* private fields */ }

Persistent LSM-tree state backend.

Backed by oxistore_kv_fjall::FjallStore, a Pure-Rust, RocksDB-inspired LSM-tree key-value engine with built-in (Pure-Rust LZ4) compression. This is a drop-in, FFI-free replacement for the former RocksDB backend.

Implementations

impl KvStateBackend

pub fn new(path: PathBuf) -> Result<Self>

Create a new LSM-tree state backend rooted at path.

The store directory is created if it does not already exist.

pub fn path(&self) -> &PathBuf

Get the database path.

Trait Implementations

impl StateBackend for KvStateBackend

fn get<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 [u8], ) -> Pin<Box<dyn Future<Output = Result<Option<Vec<u8>>>> + Send + 'async_trait>>

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

Get a value from the state.

fn put<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, key: &'life1 [u8], value: &'life2 [u8], ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Put a value into the state.

fn delete<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 [u8], ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

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

Delete a value from the state.

fn contains<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 [u8], ) -> Pin<Box<dyn Future<Output = Result<bool>> + Send + 'async_trait>>

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

Check if a key exists.

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 state.

fn snapshot<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<Vec<u8>>> + Send + 'async_trait>>

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

Create a snapshot of the state.

fn restore<'life0, 'life1, 'async_trait>( &'life0 self, snapshot: &'life1 [u8], ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

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

Restore state from a snapshot.

fn keys<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<Vec<Vec<u8>>>> + Send + 'async_trait>>

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

Get all keys.

fn name(&self) -> &str

Get the backend name.