Struct DataChunk 

pub struct DataChunk {
    pub stream_id: String,
    pub sequence: u64,
    pub payload: Bytes,
    pub metadata: Vec<MetadataEntry>,
    pub timestamp_ms: Option<i64>,
}

DataChunk - A single chunk of an application data stream (Fast Path)

For streaming application data (non-media):

• File transfer chunks
• Game state updates
• Custom protocol streams

Fields

stream_id: String

sequence: u64

payload: Bytes

metadata: Vec<MetadataEntry>

timestamp_ms: Option<i64>

Producer-defined data time for the chunk’s content (sampling instant, simulation tick, authoring time — the producing application chooses the clock and the meaning). Purely an application annotation: the runtime never reads it, ordering is carried by sequence alone, it is not a freshness or timeout input, and receivers must not compare it against their local clocks.

Deliberately the only application-semantic annotation promoted to a dedicated field: time is the overwhelmingly common stream annotation, and a typed slot keeps every SDK on one name and one type instead of per-app string conventions. Not a precedent — any other application annotation belongs in metadata.

Implementations

impl DataChunk

pub fn timestamp_ms(&self) -> i64

Returns the value of timestamp_ms, or the default value if timestamp_ms is unset.

Trait Implementations

impl Clone for DataChunk

fn clone(&self) -> DataChunk

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataChunk

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

Formats the value using the given formatter.

impl Default for DataChunk

fn default() -> Self

Returns the “default value” for a type.

impl Message for DataChunk

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for DataChunk

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DataChunk