Struct MemFileJournal

pub struct MemFileJournal { /* private fields */ }

The memory file journal processes journal entries by writing any memory mutations directly to a file. Later this can be used as a mounting target for resuming a process without having to reload the journal from scratch.

Implementations

impl MemFileJournal

pub fn new(path: &Path) -> Result<MemFileJournal, Error>

Trait Implementations

impl Clone for MemFileJournal

fn clone(&self) -> MemFileJournal

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MemFileJournal

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

Formats the value using the given formatter.

impl Drop for MemFileJournal

fn drop(&mut self)

Executes the destructor for this type.

impl Journal for MemFileJournal

fn split( self, ) -> (Box<dyn WritableJournal + Sync + Send>, Box<dyn ReadableJournal + Sync + Send>)

Splits the journal into a read and write side

impl ReadableJournal for MemFileJournal

fn read(&self) -> Result<Option<LogReadResult<'_>>, Error>

Returns a stream of snapshot objects that the runtime will use to restore the state of a WASM process to a previous moment in time

fn as_restarted(&self) -> Result<Box<dyn ReadableJournal + Sync + Send>, Error>

Resets the journal so that reads will start from the beginning again

impl WritableJournal for MemFileJournal

fn write<'a>(&'a self, entry: JournalEntry<'a>) -> Result<LogWriteResult, Error>

Takes in a stream of snapshot log entries and saves them so that they may be restored at a later moment

fn flush(&self) -> Result<(), Error>

Flushes the data to disk or network

fn commit(&self) -> Result<usize, Error>

Commits the transaction Returns the number of events committed

fn rollback(&self) -> Result<usize, Error>

Rolls back the transaction and aborts its changes Returns the number of events rolled back