Struct DagCheckpointSnapshot 

pub struct DagCheckpointSnapshot {
    pub checkpoint_id: u64,
    pub epoch: u64,
    pub timestamp: i64,
    pub node_states: HashMap<u32, SerializableOperatorState>,
    pub source_offsets: HashMap<String, u64>,
    pub watermark: Option<i64>,
}

A point-in-time snapshot of the entire DAG’s operator state.

Produced by DagCheckpointCoordinator::finalize_checkpoint(). The snapshot is serializable — persistence is the caller’s responsibility.

Fields

checkpoint_id: u64

Unique checkpoint identifier.

epoch: u64

Monotonically increasing epoch.

timestamp: i64

Timestamp when the checkpoint was triggered (millis since epoch).

node_states: HashMap<u32, SerializableOperatorState>

Per-node operator state, keyed by NodeId.0.

source_offsets: HashMap<String, u64>

Per-source offset tracking (source name → offset).

watermark: Option<i64>

Watermark at checkpoint time.

Implementations

impl DagCheckpointSnapshot

pub fn to_operator_states(&self) -> FxHashMap<NodeId, OperatorState>

Converts node states back to FxHashMap<NodeId, OperatorState>.

Trait Implementations

impl Clone for DagCheckpointSnapshot

fn clone(&self) -> DagCheckpointSnapshot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DagCheckpointSnapshot

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DagCheckpointSnapshot

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for DagCheckpointSnapshot

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

where __S: Serializer,

Serialize this value into the given Serde serializer.