Struct UnsupportedJournal

pub struct UnsupportedJournal {}

The default for runtime is to use the unsupported journal which will fail to write journal entries if one attempts to do so.

Trait Implementations

impl Debug for UnsupportedJournal

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

Formats the value using the given formatter.

impl Default for UnsupportedJournal

fn default() -> UnsupportedJournal

Returns the “default value” for a type.

impl Journal for UnsupportedJournal

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

Splits the journal into a read and write side

impl ReadableJournal for UnsupportedJournal

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 + Send + Sync>, Error>

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

impl WritableJournal for UnsupportedJournal

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