Struct EventMetadata 

pub struct EventMetadata {
    pub event_id: String,
    pub timestamp: DateTime<Utc>,
    pub correlation_id: Option<String>,
    pub entity_type: &'static str,
    pub aggregate_id: String,
}

Infrastructure metadata attached to every CRUD event.

Carries correlation tracking, timestamps, and entity identification without polluting the entity type itself.

Fields

event_id: String

Unique ID for this event instance (UUID v4).

timestamp: DateTime<Utc>

When the event was created (UTC).

correlation_id: Option<String>

Correlation ID for distributed tracing across services.

entity_type: &'static str

The static entity type name (e.g. "order", "stored_file").

aggregate_id: String

The entity’s aggregate root ID at the time of the event.

Implementations

impl EventMetadata

pub fn new(aggregate_id: impl Into<String>, entity_type: &'static str) -> Self

Construct metadata for an event on aggregate_id of type entity_type.

pub fn with_correlation(self, id: impl Into<String>) -> Self

Attach a correlation ID (builder).

Trait Implementations

impl Clone for EventMetadata

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EventMetadata

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

Formats the value using the given formatter.