Struct MemoryTransaction 

pub struct MemoryTransaction<'a> { /* private fields */ }

An in-memory transaction that enforces snapshot isolation.

Trait Implementations

impl<'a> Drop for MemoryTransaction<'a>

fn drop(&mut self)

Executes the destructor for this type.

impl<'a> KVTransaction<'a> for MemoryTransaction<'a>

fn id(&self) -> TxnId

Returns the transaction’s unique ID.

fn mode(&self) -> TxnMode

Returns the transaction’s mode (ReadOnly or ReadWrite).

fn get(&mut self, key: &Key) -> Result<Option<Value>>

Retrieves the value for a given key.

fn put(&mut self, key: Key, value: Value) -> Result<()>

Sets a value for a given key. This operation is buffered and will be applied on commit.

fn delete(&mut self, key: Key) -> Result<()>

Deletes a key-value pair. This operation is buffered and will be applied on commit.

fn scan_prefix( &mut self, prefix: &[u8], ) -> Result<Box<dyn Iterator<Item = (Key, Value)> + '_>>

Scans all key-value pairs whose keys start with the given prefix.

fn scan_range( &mut self, start: &[u8], end: &[u8], ) -> Result<Box<dyn Iterator<Item = (Key, Value)> + '_>>

Scans key-value pairs in the half-open range [start, end).

fn commit_self(self) -> Result<()>

Commits the transaction, applying all buffered writes.

fn rollback_self(self) -> Result<()>

Rolls back the transaction, discarding all buffered writes.

impl<'a> TxnManager<'a, MemoryTransaction<'a>> for &'a MemoryTxnManager

fn begin(&'a self, mode: TxnMode) -> Result<MemoryTransaction<'a>>

Begins a new transaction in the specified mode.

fn commit(&'a self, txn: MemoryTransaction<'a>) -> Result<()>

Commits a transaction, applying its changes to the store.

fn rollback(&'a self, txn: MemoryTransaction<'a>) -> Result<()>

Rolls back a transaction, discarding its changes.