Struct EventRecord 

pub struct EventRecord {
    pub event_name: String,
    pub payload_codec: Cow<'static, str>,
    pub payload_codec_version: u16,
    pub payload: Vec<u8>,
    pub event_version: u64,
    pub sequence: u64,
    pub timestamp: SystemTime,
    pub metadata: HashMap<String, String>,
}

Replayable aggregate event record stored in an event-sourced entity stream.

EventRecord is model history for aggregate hydration. It is not automatically a domain event or integration message; publishable messages belong in the outbox/bus boundary.

Fields

event_name: String

payload_codec: Cow<'static, str>

Payload codec name. Cow because virtually every event carries the crate’s own codec constant — the borrowed variant avoids one heap allocation per event created and per row decoded.

payload_codec_version: u16

payload: Vec<u8>

event_version: u64

sequence: u64

timestamp: SystemTime

metadata: HashMap<String, String>

Implementations

impl EventRecord

pub fn new( event_name: impl Into<String>, payload: Vec<u8>, sequence: u64, ) -> Self

pub fn new_versioned( event_name: impl Into<String>, payload: Vec<u8>, sequence: u64, version: u64, ) -> Self

Create an event record at a specific version.

pub fn with_metadata( event_name: impl Into<String>, payload: Vec<u8>, sequence: u64, metadata: HashMap<String, String>, ) -> Self

Create an event record with metadata.

pub fn decode<T: DeserializeOwned>(&self) -> Result<T, EventRecordError>

Deserialize the payload into the specified type.

pub fn payload_bytes(&self) -> &[u8]

Get the raw payload bytes.

pub fn meta(&self, key: &str) -> Option<&str>

Get a metadata value by key.

pub fn correlation_id(&self) -> Option<&str>

Get the correlation ID, if set.

pub fn causation_id(&self) -> Option<&str>

Get the causation ID, if set.

pub fn traceparent(&self) -> Option<&str>

Get the W3C traceparent, if set.

pub fn tracestate(&self) -> Option<&str>

Get the W3C tracestate, if set.

pub fn trace_context(&self) -> TraceContext

Extract W3C trace context from event metadata.

Trait Implementations

impl Clone for EventRecord

fn clone(&self) -> EventRecord

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EventRecord

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for EventRecord

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for EventRecord

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for EventRecord

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 EventRecord