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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | 31x 29x 29x 29x 29x 14x 14x 21x 21x 2x | import { DomainEvent } from "../../domain/events/DomainEvent";
type EventHandler = (event: DomainEvent) => Promise<void> | void;
export class DomainEventPublisher {
private handlers: Map<string, EventHandler[]> = new Map();
subscribe(eventType: string, handler: EventHandler): () => void {
const handlers = this.handlers.get(eventType) || [];
handlers.push(handler);
this.handlers.set(eventType, handlers);
return () => {
// Unsubscribe logic to remove the handler and prevent memory leaks
const updatedHandlers =
this.handlers.get(eventType)?.filter((h) => h !== handler) || [];
this.handlers.set(eventType, updatedHandlers);
};
}
async publish(event: DomainEvent): Promise<void> {
const handlers = this.handlers.get(event.eventType) || [];
for (const handler of handlers) {
try {
await handler(event);
} catch (error) {
console.error(`Error handling event ${event.eventType}:`, error);
}
}
}
}
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