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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 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | 2x 2x 2x 2x 2x 2x 2x 3x 3x 3x 2x 2x 2x 1x 1x 1x | import { RabbitSubscribe } from '@golevelup/nestjs-rabbitmq';
import { Injectable, Logger } from '@nestjs/common';
import { EXCHANGES, WORK_ORDER_EVENTS } from '@app/contracts';
import type { WorkOrderEvent } from '@app/contracts';
import { TriageClassifier } from './triage-classifier';
import { TriageService } from './triage.service';
export const TRIAGE_QUEUE = 'work-orders.triage';
/**
* Triage rides the same event that fans out to notifications — the service
* reacts to its own domain event instead of classifying inline, so the write
* path never waits on (or fails with) the LLM call. No retry/DLQ here on
* purpose: a failed classification returns null rather than throwing, and
* re-running a paid, non-deterministic call on redelivery buys little.
*/
@Injectable()
export class WorkOrderTriageConsumer {
private readonly logger = new Logger(WorkOrderTriageConsumer.name);
constructor(
private readonly classifier: TriageClassifier,
private readonly triage: TriageService,
) {}
@RabbitSubscribe({
exchange: EXCHANGES.EVENTS,
routingKey: WORK_ORDER_EVENTS.CREATED,
queue: TRIAGE_QUEUE,
queueOptions: { durable: true },
})
async onWorkOrderCreated(event: WorkOrderEvent): Promise<void> {
const triage = await this.classifier.classify({
title: event.data.title,
description: event.data.description,
priority: event.data.priority,
});
if (!triage) {
this.logger.warn(
`no classification for work order ${event.data.workOrderId}, skipping`,
);
return;
}
await this.triage.apply(event.data.workOrderId, triage);
}
}
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