Trait VersionedStateStore

pub trait VersionedStateStore<V>: VersionedStateStoreR<V>
where
    V: VersionIdentifier,
{
    // Required method
    fn atomic_write<'a>(
        &'a self,
        base: Option<&V>,
        version_id: &V,
        changes: Box<dyn Iterator<Item = (Key, Option<Value>)> + 'a>,
    ) -> Result<(), VersionedStateStoreError>;
}

Storage with versioning.

Required Methods

fn atomic_write<'a>( &'a self, base: Option<&V>, version_id: &V, changes: Box<dyn Iterator<Item = (Key, Option<Value>)> + 'a>, ) -> Result<(), VersionedStateStoreError>

Atomically apply a list of changes described by the iterator to the state of the base version, saved in the new version. Also set the latest version to version. For each iterated item, a None value will remove the value if it exists.

Implementors

impl<V: VersionIdentifier> VersionedStateStore<V> for MemVersionedStateStore<V>

impl<V: VersionIdentifier, T: KVStore> VersionedStateStore<V> for DBVersionedStateStore<V, T>