Struct CheckpointRecordState 

pub struct CheckpointRecordState {
    pub checkpoint_id: CheckpointId,
    pub namespace_id: NamespaceId,
    pub manifest_id: ManifestId,
    pub manifest_object_id: ManifestObjectId,
    pub manifest_head_seq: ChangeSeq,
    pub manifest_payload_checksum: String,
    pub head_commit_id: CommitId,
    pub created_at_ms: u64,
    pub expires_at_ms: Option<u64>,
    pub owner: CheckpointOwner,
    pub state: CheckpointRecordLifecycle,
}

A checkpoint record: pins one metadata manifest (its basis) so garbage collection keeps everything the manifest references.

Stored as its own object under checkpoints/; never part of a manifest and never an input to latest visibility. Created write-then-verify: the record is written active, then the basis manifest is re-verified against the floor, and a failed verification flips the record to released.

Fields

checkpoint_id: CheckpointId

Freshly generated record identity, one per logical pin. Nothing derives it, and no caller supplies it, so a new pin can never land on a released record’s key.

namespace_id: NamespaceId

Source namespace whose manifest and metadata remain pinned.

manifest_id: ManifestId

Logical manifest position of the pinned basis.

manifest_object_id: ManifestObjectId

Immutable manifest candidate selected at manifest_id.

manifest_head_seq: ChangeSeq

Greatest source sequence materialized by the pinned manifest.

manifest_payload_checksum: String

Must equal payload_checksum in the referenced manifest envelope.

head_commit_id: CommitId

Commit identity at the pinned manifest head, verified against its payload.

created_at_ms: u64

Unix-millisecond creation stamp used by GC grace policy, never validity ordering.

expires_at_ms: Option<u64>

When garbage collection may release this record without asking anyone.

A user pin carries the caller’s ttl_ms, or nothing at all, in which case it is held until released. A fork-owned record always carries one: it is the lease covering a single fork attempt, and its expiry is how an abandoned attempt becomes collectable.

owner: CheckpointOwner

Party whose durable lifecycle determines when this pin can be released.

state: CheckpointRecordLifecycle

Current lifecycle, advanced only by the one-way release compare-and-swap.

Trait Implementations

impl Clone for CheckpointRecordState

fn clone(&self) -> CheckpointRecordState

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CheckpointRecordState

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CheckpointRecordState

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for CheckpointRecordState

impl PartialEq for CheckpointRecordState

fn eq(&self, other: &CheckpointRecordState) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for CheckpointRecordState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for CheckpointRecordState