adding monkeytype

backend/src/jobs/log-queue-sizes.ts

@@ -0,0 +1,31 @@
+import { CronJob } from "cron";
+import Queues from "../queues/index";
+import { setQueueLength } from "../utils/prometheus";
+
+const CRON_SCHEDULE = "0 */5 * * * *";
+
+async function main(): Promise<void> {
+  await Promise.all(
+    Queues.map(async (queue) => {
+      const counts = await queue.getJobCounts();
+
+      const active = counts["active"] ?? 0;
+      const completed = counts["completed"] ?? 0;
+      const failed = counts["failed"] ?? 0;
+
+      const waiting = counts["waiting"] ?? 0;
+      const paused = counts["paused"] ?? 0;
+      const delayed = counts["delayed"] ?? 0;
+      const waitingChildren = counts["waiting-children"] ?? 0;
+
+      const waitingTotal = waiting + paused + delayed + waitingChildren;
+
+      setQueueLength(queue.queueName, "completed", completed);
+      setQueueLength(queue.queueName, "active", active);
+      setQueueLength(queue.queueName, "failed", failed);
+      setQueueLength(queue.queueName, "waiting", waitingTotal);
+    }),
+  );
+}
+
+export default new CronJob(CRON_SCHEDULE, main);