Struct WorkerStructuredMessage 

pub struct WorkerStructuredMessage {
    pub message_id: u64,
    pub worker_id: WorkerId,
    pub direction: WorkerMessageDirection,
    pub payload: Option<StructuredClonePayload>,
}

A structured-clone message crossing the page↔worker boundary.

Carries both the serialized payload and metadata for CDP observability. Each message gets a unique ID for trace correlation.

@trace REQ-BRW-004 [entity:Worker] [criterion:6] DF-WK-4 / DF-WK-5

Fields

message_id: u64

Unique message ID for CDP trace correlation.

worker_id: WorkerId

Which Worker this message is associated with.

direction: WorkerMessageDirection

Direction of the message.

payload: Option<StructuredClonePayload>

Structured-clone serialized payload (when available from servo). None when only forwarding metadata (e.g., servo handles clone internally).

Implementations

impl WorkerStructuredMessage

pub fn new( worker_id: WorkerId, direction: WorkerMessageDirection, payload: Option<StructuredClonePayload>, ) -> Self

Create a new structured message with a unique ID.

@trace REQ-BRW-004 [entity:Worker] [criterion:6]

pub fn metadata_only( worker_id: WorkerId, direction: WorkerMessageDirection, ) -> Self

Create a metadata-only message (no structured-clone payload). Used when servo handles the clone internally and bao only observes.

@trace REQ-BRW-004 [entity:Worker] DF-WK-4 / DF-WK-5

pub fn with_payload( worker_id: WorkerId, direction: WorkerMessageDirection, data: Vec<u8>, transferable_count: u32, ) -> Self

Create a message with serialized structured-clone data.

@trace REQ-BRW-004 [entity:Worker] [criterion:6]

Trait Implementations

impl Clone for WorkerStructuredMessage

fn clone(&self) -> WorkerStructuredMessage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WorkerStructuredMessage

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

Formats the value using the given formatter.