Resolve #4462

src/daemons/queue-stats.ts

@@ -0,0 +1,43 @@
+import * as Deque from 'double-ended-queue';
+import Xev from 'xev';
+import { deliverQueue, inboxQueue } from '../queue';
+
+const ev = new Xev();
+
+const interval = 1000;
+
+/**
+ * Report queue stats regularly
+ */
+export default function() {
+	const log = new Deque<any>();
+
+	ev.on('requestQueueStatsLog', x => {
+		ev.emit(`queueStatsLog:${x.id}`, log.toArray().slice(0, x.length || 50));
+	});
+
+	async function tick() {
+		const deliverJobCounts = await deliverQueue.getJobCounts();
+		const inboxJobCounts = await inboxQueue.getJobCounts();
+
+		const stats = {
+			deliver: {
+				active: Math.floor(Math.random() * 100),
+				delayed: Math.floor(Math.random() * 1000),
+			},
+			inbox: {
+				active: Math.floor(Math.random() * 100),
+				delayed: Math.floor(Math.random() * 1000),
+			}
+		};
+
+		ev.emit('queueStats', stats);
+
+		log.unshift(stats);
+		if (log.length > 200) log.pop();
+	}
+
+	tick();
+
+	setInterval(tick, interval);
+}