import { Injectable } from '@nestjs/common'; import Xev from 'xev'; import { QueueService } from '@/core/QueueService.js'; import { bindThis } from '@/decorators.js'; import type { OnApplicationShutdown } from '@nestjs/common'; const ev = new Xev(); const interval = 10000; @Injectable() export class QueueStatsService implements OnApplicationShutdown { private intervalId: NodeJS.Timer; constructor( private queueService: QueueService, ) { } /** * Report queue stats regularly */ @bindThis public start(): void { const log = [] as any[]; ev.on('requestQueueStatsLog', x => { ev.emit(`queueStatsLog:${x.id}`, log.slice(0, x.length ?? 50)); }); let activeDeliverJobs = 0; let activeInboxJobs = 0; this.queueService.deliverQueue.on('global:active', () => { activeDeliverJobs++; }); this.queueService.inboxQueue.on('global:active', () => { activeInboxJobs++; }); const tick = async () => { const deliverJobCounts = await this.queueService.deliverQueue.getJobCounts(); const inboxJobCounts = await this.queueService.inboxQueue.getJobCounts(); const stats = { deliver: { activeSincePrevTick: activeDeliverJobs, active: deliverJobCounts.active, waiting: deliverJobCounts.waiting, delayed: deliverJobCounts.delayed, }, inbox: { activeSincePrevTick: activeInboxJobs, active: inboxJobCounts.active, waiting: inboxJobCounts.waiting, delayed: inboxJobCounts.delayed, }, }; ev.emit('queueStats', stats); log.unshift(stats); if (log.length > 200) log.pop(); activeDeliverJobs = 0; activeInboxJobs = 0; }; tick(); this.intervalId = setInterval(tick, interval); } @bindThis public onApplicationShutdown(signal?: string | undefined) { clearInterval(this.intervalId); } }