Struct MemStorage 

pub struct MemStorage { /* private fields */ }

In-memory Storage: two byte buffers, no failure modes.

The reference implementation for tests and for ephemeral databases (an agent’s scratch memory that intentionally dies with the process).

Implementations

impl MemStorage

pub fn new() -> Self

A storage with no snapshot and an empty journal (first run).

Trait Implementations

impl Clone for MemStorage

fn clone(&self) -> MemStorage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MemStorage

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

Formats the value using the given formatter.

impl Default for MemStorage

fn default() -> MemStorage

Returns the “default value” for a type.

impl Eq for MemStorage

impl PartialEq for MemStorage

fn eq(&self, other: &MemStorage) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Storage for MemStorage

type Error = Infallible

Implementation-specific failure (I/O error, host callback error…).

fn read_snapshot(&mut self) -> Result<Option<Vec<u8>>, Self::Error>

The full snapshot image, or None when no database exists yet (first run).

fn write_snapshot(&mut self, bytes: &[u8]) -> Result<(), Self::Error>

Atomically replaces the snapshot image.

fn read_journal(&mut self) -> Result<Vec<u8>, Self::Error>

All journal bytes accumulated since the last snapshot (empty is normal).

fn append_journal(&mut self, entry: &[u8]) -> Result<(), Self::Error>

Appends one framed journal entry (see crate::journal).

fn clear_journal(&mut self) -> Result<(), Self::Error>

Discards the journal (called after a successful snapshot).

impl StructuralPartialEq for MemStorage