Struct CompactingTransactionJournal

pub struct CompactingTransactionJournal<W: WritableJournal, R: ReadableJournal> { /* private fields */ }

Journal which will store the events locally in memory until it is either committed or rolled back

Implementations

impl CompactingTransactionJournal<Box<DynWritableJournal>, Box<DynReadableJournal>>

pub fn new<J>(inner: J) -> Self

where J: Journal,

Creates a compacting transactional journal which will hold events in memory until the journal is either committed or rolled back.

When the journal is commited it will perform a compaction of the events before they are misseeed to the underlying journal

impl<W: WritableJournal, R: ReadableJournal> CompactingTransactionJournal<W, R>

pub fn into_inner(self) -> TransactionJournal<W, R>

Trait Implementations

impl<W: Debug + WritableJournal, R: Debug + ReadableJournal> Debug for CompactingTransactionJournal<W, R>

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

Formats the value using the given formatter.

impl Journal for CompactingTransactionJournal<Box<DynWritableJournal>, Box<DynReadableJournal>>

fn split(self) -> (Box<DynWritableJournal>, Box<DynReadableJournal>)

Splits the journal into a read and write side

impl<W: WritableJournal, R: ReadableJournal> ReadableJournal for CompactingTransactionJournal<W, R>

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

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<DynReadableJournal>>

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

impl<W: WritableJournal, R: ReadableJournal> WritableJournal for CompactingTransactionJournal<W, R>

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

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<()>

Flushes the data to disk or network

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

Commits the transaction Returns the number of events committed

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

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