Struct ElementMeta 

pub struct ElementMeta {
    pub sequence: u64,
    pub timestamp_ns: u64,
    pub content_type: String,
}

Metadata accompanying each stream element.

Maps to the WIT element-meta record in torvyn:streaming@0.1.0 (Doc 01, Section 3.1). This is a plain data record — cheap to copy.

Per consolidated review (C01-4): the runtime (reactor’s flow driver) assigns sequence and timestamp_ns before delivery. Component-provided values are advisory and may be overwritten.

Examples

use torvyn_types::ElementMeta;

let meta = ElementMeta {
    sequence: 42,
    timestamp_ns: 1_700_000_000_000_000_000,
    content_type: "application/json".into(),
};
assert_eq!(meta.sequence, 42);

Fields

sequence: u64

Monotonic sequence number within this flow. Starts at 0 and increments by 1 for each element. The runtime guarantees uniqueness and ordering within a single flow.

timestamp_ns: u64

Wall-clock timestamp in nanoseconds since Unix epoch. Set by the runtime when the element enters the pipeline.

content_type: String

Content type of the payload (e.g., “application/json”). Mirrors the buffer’s content-type for convenience; components can use this for dispatch without reading the buffer.

Implementations

impl ElementMeta

pub fn new(sequence: u64, timestamp_ns: u64, content_type: String) -> Self

Create a new ElementMeta with the given values.

HOT PATH — called per stream element.

Trait Implementations

impl Clone for ElementMeta

fn clone(&self) -> ElementMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ElementMeta

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ElementMeta

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ElementMeta

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

Formats the value using the given formatter.

impl PartialEq for ElementMeta

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ElementMeta

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for ElementMeta

impl StructuralPartialEq for ElementMeta