Struct VersionStore 

pub struct VersionStore { /* private fields */ }

In-memory version store backed by a BTreeMap.

Keys are (entity_id, version_seq) where entity_id is the node/edge ID and version_seq is a monotonically increasing sequence number per entity.

Implementations

impl VersionStore

pub fn new() -> Self

Create a new empty version store.

pub fn snapshot_node(&mut self, entity_id: u64, record: NodeRecord) -> u64

Snapshot a node record before an update. Returns the version sequence number assigned.

pub fn snapshot_relationship( &mut self, entity_id: u64, record: RelationshipRecord, ) -> u64

Snapshot a relationship record before an update. Returns the version sequence number assigned.

pub fn get_version( &self, entity_id: u64, version_seq: u64, ) -> Option<&VersionRecord>

Get a specific version of an entity.

pub fn get_latest_version(&self, entity_id: u64) -> Option<&VersionRecord>

Get the latest version of an entity (the most recent snapshot).

pub fn get_version_chain(&self, entity_id: u64) -> Vec<(u64, &VersionRecord)>

Get the full version chain for an entity (oldest to newest).

pub fn version_count(&self, entity_id: u64) -> u64

Get the number of versions stored for an entity.

pub fn total_versions(&self) -> usize

Get the total number of version records stored.

pub fn insert_loaded_record( &mut self, entity_id: u64, version_seq: u64, record: VersionRecord, )

Insert a version record loaded from persistent storage.

Updates next_seq to ensure new sequence numbers don’t collide.

pub fn all(&self) -> impl Iterator<Item = (&(u64, u64), &VersionRecord)>

Returns an iterator over all (entity_id, version_seq, record) tuples.

Trait Implementations

impl Default for VersionStore

fn default() -> Self

Returns the “default value” for a type.