Struct GraphSnapshot 

pub struct GraphSnapshot {
    pub revision: u64,
    pub nodes: Vec<NodeInfo>,
    pub edges: Vec<EdgeInfo>,
}

A consistent copy of the whole topology, taken under the graph’s lock and then read without it.

revision increments on every mutation, so two snapshots can be told apart even when they describe the same shape. This is also what crate::pipeline::Pipeline::topology renders and what a run/attach/ detach log record embeds.

Fields

revision: u64

Monotonically increasing graph version. Each successful mutation increments it exactly once.

nodes: Vec<NodeInfo>

Elements attached when this snapshot was taken.

edges: Vec<EdgeInfo>

Connections attached when this snapshot was taken.

Implementations

impl GraphSnapshot

pub fn node(&self, id: ElementId) -> Option<&NodeInfo>

Finds one node by stable identity within this snapshot.

pub fn terminal_ids(&self) -> Vec<ElementId>

Returns the attached terminal sinks in this snapshot.

A terminal has an incoming edge and no outgoing edge. An empty dynamic crate::elements::Tee is excluded: it is a leaf in the drawing, but has no terminal sink that can acknowledge preroll.

pub fn topology(&self) -> String

Renders every root-to-leaf path in insertion order. Keeping edges separate from nodes means this also remains meaningful for fan-in graphs, where a node can have more than one upstream.

Trait Implementations

impl Clone for GraphSnapshot

fn clone(&self) -> GraphSnapshot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GraphSnapshot

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

Formats the value using the given formatter.