Struct ProcessHistoryEntry 

pub struct ProcessHistoryEntry {
    pub element_id: String,
    pub transition: String,
    pub via_flow: Option<String>,
    pub note: Option<String>,
    pub at: String,
}

ProcessHistoryEntry : One per-element transition record, in chronological (push) order. Populated by the engine since #421, correcting the text that stood here until #1613 ("Not currently populated by the engine – always an empty array today"). That sentence was true of the Phase 5 Task 3 contract and stopped being true when the engine gained a persisted transition log; it outlived the change, and the run overlay was built to infer edge state from element state on the strength of it. Bounded at 2000 records (worker_bpmn::MAX_HISTORY), oldest dropped first, so a long-running or heavily looping instance carries the most recent window rather than its whole run.

Fields

element_id: String

transition: String

via_flow: Option<String>

The incoming sequence flow the token arrived at this element by (#1613). Not keyed to the transition kind (#1627): the engine snapshots the token’s arrival flow once per visit and stamps it on whichever record that visit produces – entered, completed or failed alike. Absent only where there is no arrival flow to name: a token freshly created at a start event, a multi-instance body token, and the records written on the async job-resume path. This is what makes per-edge run state a fact rather than an inference. From element state alone a traversal is only derivable as "source completed AND target now active", which cannot express a parallel join mid-execution (the branch that already delivered reads idle) or a re-traversed loop-back (indistinguishable from a single pass). The engine records an entered on a converging gateway for every arrival, satisfying or not, so each delivered branch is named here by its own flow id; and a loop-back is two entered records with the same via_flow and different at.

note: Option<String>

why this transition is not what it looks like. Set only by a noop delegate binding today (#923): the activity reports completed without having run anything, and this carries the binding’s mandatory reason.

at: String

Implementations

impl ProcessHistoryEntry

pub fn new( element_id: String, transition: String, at: String, ) -> ProcessHistoryEntry

One per-element transition record, in chronological (push) order. Populated by the engine since #421, correcting the text that stood here until #1613 ("Not currently populated by the engine – always an empty array today"). That sentence was true of the Phase 5 Task 3 contract and stopped being true when the engine gained a persisted transition log; it outlived the change, and the run overlay was built to infer edge state from element state on the strength of it. Bounded at 2000 records (worker_bpmn::MAX_HISTORY), oldest dropped first, so a long-running or heavily looping instance carries the most recent window rather than its whole run.

Trait Implementations

impl Clone for ProcessHistoryEntry

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ProcessHistoryEntry

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

Formats the value using the given formatter.

impl Default for ProcessHistoryEntry

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ProcessHistoryEntry

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ProcessHistoryEntry

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for ProcessHistoryEntry

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ProcessHistoryEntry