Struct MemKvStore 

pub struct MemKvStore { /* private fields */ }

Implementations

impl MemKvStore

pub const DEFAULT_BLOCK_SIZE: usize = 4_096usize

pub fn new(config: MemKvConfig) -> MemKvStore

pub fn get(&self, key: &[u8]) -> Option<Bytes>

pub fn set(&mut self, key: &[u8], value: Bytes)

pub fn compare_and_swap( &mut self, key: &[u8], old: Option<Bytes>, new: Bytes, ) -> bool

pub fn remove(&mut self, key: &[u8])

pub fn contains_key(&self, key: &[u8]) -> bool

Check if the key exists in the mem table or the sstable

If the value is empty, it means the key is deleted

pub fn scan( &self, start: Bound<&[u8]>, end: Bound<&[u8]>, ) -> Box<dyn DoubleEndedIterator<Item = (Bytes, Bytes)> + '_>

pub fn len(&self) -> usize

The number of valid keys in the mem table and sstable, it’s expensive to call

pub fn is_empty(&self) -> bool

pub fn size(&self) -> usize

pub fn export_all(&mut self) -> Bytes

pub fn import_all(&mut self, bytes: Bytes) -> Result<(), String>

We can import several times, the latter will override the former.

Trait Implementations

impl Clone for MemKvStore

fn clone(&self) -> MemKvStore

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MemKvStore

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

Formats the value using the given formatter.

impl KvStore for MemKvStore

fn get(&self, key: &[u8]) -> Option<Bytes>

fn set(&mut self, key: &[u8], value: Bytes)

fn compare_and_swap( &mut self, key: &[u8], old: Option<Bytes>, new: Bytes, ) -> bool

fn remove(&mut self, key: &[u8]) -> Option<Bytes>

fn contains_key(&self, key: &[u8]) -> bool

fn scan( &self, start: Bound<&[u8]>, end: Bound<&[u8]>, ) -> Box<dyn DoubleEndedIterator<Item = (Bytes, Bytes)> + '_>

fn len(&self) -> usize

fn is_empty(&self) -> bool

fn size(&self) -> usize

fn export_all(&mut self) -> Bytes

fn import_all(&mut self, bytes: Bytes) -> Result<(), String>

fn clone_store(&self) -> Arc<Mutex<dyn KvStore>>