ZapCheckpointStore class

Checkpoint persistence: atomic tmp+rename writes (the SnapshotStore discipline from #808), restorable across host processes when the directory is shared.

Constructors

ZapCheckpointStore({String? dir})

Properties

dir → String?

Directory holding <stateId>.json snapshots; null = memory only.

final

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

load(String stateId) → Future<Map<String, Object?>?>

Loads the record for stateId, from disk when persistent.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

save(Map<String, Object?> snapshot) → Future<({String digest, String stateId})>

Saves snapshot, returning (stateId, digest).

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

digestOf(Map<String, Object?> snapshot) → String

The digest stamped on a snapshot record: sha256 over the canonical (sorted-key) JSON of snapshot. save stamps it; the restore path recomputes it over whatever is actually on disk, so an edited or planted checkpoint file is rejected instead of restored.