Struct TensorStateSnapshot 

pub struct TensorStateSnapshot {
    pub snapshots: HashMap<u64, StateSnapshot>,
    pub next_id: u64,
}

Manages captures and retrieval of StateSnapshots.

Fields

snapshots: HashMap<u64, StateSnapshot>

All retained snapshots keyed by their snapshot_id.

next_id: u64

Counter used to assign the next unique id.

Implementations

impl TensorStateSnapshot

pub fn new() -> Self

Create a new, empty manager.

pub fn capture( &mut self, node_id: &str, fields: Vec<FieldData>, now_secs: u64, ) -> u64

Capture a snapshot for node_id containing fields at now_secs.

Returns the assigned snapshot_id.

pub fn get(&self, id: u64) -> Option<&StateSnapshot>

Retrieve a snapshot by id.

pub fn delete(&mut self, id: u64) -> bool

Delete a snapshot by id. Returns true when the snapshot existed.

pub fn diff(&self, old_id: u64, new_id: u64) -> Option<SnapshotDelta>

Compute the difference between snapshot old_id and snapshot new_id.

Returns None if either id is not found.

pub fn latest(&self) -> Option<&StateSnapshot>

Return a reference to the snapshot with the highest snapshot_id.

pub fn stats(&self) -> StateSnapshotStats

Aggregate statistics over all retained snapshots.

Trait Implementations

impl Default for TensorStateSnapshot

fn default() -> Self

Returns the “default value” for a type.