Struct ActivityTask 

pub struct ActivityTask {
    pub workflow_id: WorkflowId,
    pub activity_id: ActivityId,
    pub run_id: RunId,
    pub activity_type: String,
    pub attempt: u32,
    pub completion_token: String,
    pub idempotency_key: String,
    pub input: Payload,
    pub labels: BTreeMap<String, String>,
}

SDK-level activity task envelope decoded from the AW-owned worker proto.

Fields

workflow_id: WorkflowId

Owning workflow id, required later when reporting this task’s outcome.

activity_id: ActivityId

Activity id correlating reports and heartbeats with this task.

run_id: RunId

Concrete workflow run that staged this task — the generation axis.

REQUIRED, not optional: a continue-as-new chain reuses one workflow id while activity ordinals and attempt numbers restart in every generation, so (workflow, activity, attempt) alone does not name a dispatch. The run is what every transcript event this task emits is keyed by, and crate::ActivityContext hands it to the handler as a plain value — a handler must never have to invent one. Decoding refuses a wire task without it ([MalformedActivityTask::MissingRunId]), so a hand-built test task names its generation exactly as a live dispatch does.

activity_type: String

Registered activity type name requested by the engine.

attempt: u32

One-based delivery attempt stamped by the dispatching engine seam and read from the wire. Zero is malformed and rejected at decode.

completion_token: String

Opaque execution-generation token echoed verbatim on every outcome.

idempotency_key: String

Stable external-effect key for this run and action site. Identical across retries and available to handlers through crate::ActivityContext.

input: Payload

Opaque activity input payload, preserving its content-type tag.

labels: BTreeMap<String, String>

Human-meaningful display labels the workflow attached to the activity (for example brief=IP-001). Display metadata only — surfaced in the worker’s logs. BTreeMap keeps the rendered order stable; empty when the workflow attached none.

Trait Implementations

impl Clone for ActivityTask

fn clone(&self) -> ActivityTask

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ActivityTask

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

Formats the value using the given formatter.

impl Eq for ActivityTask

impl PartialEq for ActivityTask

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ActivityTask

impl TryFrom<ProtoActivityTask> for ActivityTask

type Error = WorkerError

The type returned in the event of a conversion error.

fn try_from(value: ProtoActivityTask) -> Result<Self, Self::Error>

Performs the conversion.