37 lines
1.3 KiB
TypeScript
37 lines
1.3 KiB
TypeScript
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import { Injectable, Logger } from '@nestjs/common';
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import { EventEmitter2 } from '@nestjs/event-emitter';
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import { QueueService } from '../../infrastructure/queue/queue.service';
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import { BaseDomainEvent } from '../events/base-domain.event';
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import { safeLog } from '../../infrastructure/logger/sensitive-logger';
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export const DOMAIN_EVENT = 'domain.event';
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@Injectable()
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export class EventBusService {
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private readonly logger = new Logger(EventBusService.name);
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constructor(
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private readonly eventEmitter: EventEmitter2,
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private readonly queue: QueueService,
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) {}
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/** Sync: process-in-memory, low latency, fire-and-forget */
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publish(event: BaseDomainEvent): void {
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this.logger.log(`[sync] ${event.eventType} id=${event.eventId}`);
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this.eventEmitter.emit(DOMAIN_EVENT, event);
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this.eventEmitter.emit(event.eventType, event);
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}
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/** Async: persistent via BullMQ, retry + DLQ */
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async publishAsync(event: BaseDomainEvent): Promise<string> {
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const job = await this.queue.add('domain-events', {
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eventType: event.eventType,
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eventId: event.eventId,
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payload: safeLog(event),
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occurredAt: event.occurredAt.toISOString(),
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});
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this.logger.log(`[async] ${event.eventType} id=${event.eventId} job=${job.id}`);
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return job.id || '';
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}
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}
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