Trait DomainEvent

Source

pub trait DomainEvent:
    Clone
    + Send
    + Sync
    + 'static {
    // Required methods
    fn event_type(&self) -> &'static str;
    fn aggregate_id(&self) -> &str;

    // Provided methods
    fn occurred_at(&self) -> DateTime<Utc> { ... }
    fn aggregate_type(&self) -> &'static str { ... }
    fn version(&self) -> u32 { ... }
}

Expand description

Trait for domain events

All domain events must implement this trait to be used with the EventBus. Domain events represent something that happened in the domain that domain experts care about.

§Example

use backbone_messaging::DomainEvent;
use chrono::{DateTime, Utc};

#[derive(Clone, Debug)]
struct OrderPlaced {
    order_id: String,
    customer_id: String,
    total: f64,
    placed_at: DateTime<Utc>,
}

impl DomainEvent for OrderPlaced {
    fn event_type(&self) -> &'static str {
        "OrderPlaced"
    }

    fn aggregate_id(&self) -> &str {
        &self.order_id
    }

    fn occurred_at(&self) -> DateTime<Utc> {
        self.placed_at
    }
}