Struct StepInfo 

pub struct StepInfo {
    pub step: usize,
    pub checkpoint_id: String,
    pub timestamp: Option<String>,
    pub pending_nodes: Vec<String>,
    pub state_keys: Vec<String>,
}

Available on crate feature graph only.

Information about a single execution step in the graph history.

Each StepInfo corresponds to a checkpoint saved after a super-step in the Pregel execution model. It provides metadata useful for navigating and understanding the execution timeline.

Example

use adk_graph::time_travel::StepInfo;

let step = StepInfo {
    step: 3,
    checkpoint_id: "abc-123".to_string(),
    timestamp: Some("2025-01-15T10:30:00Z".to_string()),
    pending_nodes: vec!["transform".to_string()],
    state_keys: vec!["data".to_string(), "result".to_string()],
};

println!("Step {} has {} pending nodes", step.step, step.pending_nodes.len());

Fields

step: usize

The step number in the execution sequence (0-indexed).

checkpoint_id: String

The unique checkpoint identifier for this step.

timestamp: Option<String>

ISO 8601 timestamp when this step was checkpointed, if available.

pending_nodes: Vec<String>

Node names that were pending execution at this step.

state_keys: Vec<String>

State keys that were present at this step.

Trait Implementations

impl Clone for StepInfo

fn clone(&self) -> StepInfo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StepInfo

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

Formats the value using the given formatter.

impl Serialize for StepInfo

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

where __S: Serializer,

Serialize this value into the given Serde serializer.