refactor: Extract processor job into separate background jobs

packages/backend/src/queues/flow.ts

@@ -0,0 +1,26 @@
+import process from 'process';
+import { Queue, QueueScheduler } from 'bullmq';
+import redisConfig from '../config/redis';
+import logger from '../helpers/logger';
+
+const CONNECTION_REFUSED = 'ECONNREFUSED';
+
+const redisConnection = {
+  connection: redisConfig,
+};
+
+const flowQueue = new Queue('flow', redisConnection);
+const queueScheduler = new QueueScheduler('flow', redisConnection);
+
+process.on('SIGTERM', async () => {
+  await queueScheduler.close();
+});
+
+flowQueue.on('error', (err) => {
+  if ((err as any).code === CONNECTION_REFUSED) {
+    logger.error('Make sure you have installed Redis and it is running.', err);
+    process.exit();
+  }
+});
+
+export default flowQueue;