Struct Event 

pub struct Event {
    pub id: String,
    pub payload: Map<String, Value>,
    pub metadata: Map<String, Value>,
}

An immutable unit of work moving through a branch’s step chain.

Fields

id: String

Stable id, minted fresh per ingress emission.

payload: Map<String, Value>

Trigger data (the ingress payload: cron tick, bus message, feed item, …).

metadata: Map<String, Value>

Platform/trace metadata. Nodes add via Event::with_metadata.

Implementations

impl Event

pub fn new(payload: Map<String, Value>) -> Self

Mint a new event with a fresh id from a payload object.

pub fn from_json(value: Value) -> Self

Convenience constructor from any JSON value; non-object payloads are wrapped as { "value": <v> } so the payload is always an object.

pub fn with_payload(&self, patch: Map<String, Value>) -> Event

Return a copy with patch merged into the payload. Same id.

pub fn with_metadata(&self, patch: Map<String, Value>) -> Event

Return a copy with patch merged into the metadata. Same id.

pub fn payload_path(&self, path: &str) -> Option<&Value>

Read a dotted path out of the payload (a.b.c), or None if absent.

Trait Implementations

impl Clone for Event

fn clone(&self) -> Event

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Event

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

Formats the value using the given formatter.