Struct Transaction 

pub struct Transaction { /* private fields */ }

Transaction — snapshots the versions, performs modify operations, and commits/rolls back at the end.

Implementations

impl Transaction

pub fn begin(cache: &ObjectCache, level: ConsistencyLevel) -> Self

begin — Spec §B.7.4.1.

pub fn id(&self) -> TransactionId

Transaction ID.

pub fn level(&self) -> ConsistencyLevel

Consistency level.

pub fn state(&self) -> TransactionState

Current state.

pub fn snapshot_size(&self) -> usize

Number of objects in the snapshot.

pub fn expected_version(&self, id: &ObjectId) -> Option<u64>

Expected version of an object in the snapshot.

pub fn commit( &mut self, cache: &mut ObjectCache, ) -> Result<(), TransactionError>

commit — Spec §B.7.4.4. Checks for all snapshotted objects whether the version still matches; on conflict returns OptimisticConflict and sets state → Aborted.

Errors

Siehe TransactionError.

pub fn rollback( &mut self, cache: &mut ObjectCache, ) -> Result<(), TransactionError>

rollback — Spec §B.7.4.5.

Errors

NotActive if the transaction is already finished.

Trait Implementations

impl Debug for Transaction

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

Formats the value using the given formatter.