refactor(core): Migrate DB setup to use DI (#15324)

packages/cli/src/abstract-server.ts

@@ -11,7 +11,8 @@ import { Logger } from 'n8n-core';
 
 import config from '@/config';
 import { N8N_VERSION, TEMPLATES_DIR, inDevelopment, inTest } from '@/constants';
-import * as Db from '@/db';
+import { DbConnection } from '@/databases/db-connection';
+import { ServiceUnavailableError } from '@/errors/response-errors/service-unavailable.error';
 import { ExternalHooks } from '@/external-hooks';
 import { rawBodyReader, bodyParser, corsMiddleware } from '@/middlewares';
 import { send, sendErrorResponse } from '@/response-helper';
@@ -21,8 +22,6 @@ import { WaitingForms } from '@/webhooks/waiting-forms';
 import { WaitingWebhooks } from '@/webhooks/waiting-webhooks';
 import { createWebhookHandlerFor } from '@/webhooks/webhook-request-handler';
 
-import { ServiceUnavailableError } from './errors/response-errors/service-unavailable.error';
-
 @Service()
 export abstract class AbstractServer {
 	protected logger: Logger;
@@ -35,6 +34,8 @@ export abstract class AbstractServer {
 
 	protected globalConfig = Container.get(GlobalConfig);
 
+	protected dbConnection = Container.get(DbConnection);
+
 	protected sslKey: string;
 
 	protected sslCert: string;
@@ -126,8 +127,10 @@ export abstract class AbstractServer {
 			res.send({ status: 'ok' });
 		});
 
+		const { connectionState } = this.dbConnection;
+
 		this.app.get('/healthz/readiness', (_req, res) => {
-			const { connected, migrated } = Db.connectionState;
+			const { connected, migrated } = connectionState;
 			if (connected && migrated) {
 				res.status(200).send({ status: 'ok' });
 			} else {
@@ -135,7 +138,6 @@ export abstract class AbstractServer {
 			}
 		});
 
-		const { connectionState } = Db;
 		this.app.use((_req, res, next) => {
 			if (connectionState.connected) {
 				if (connectionState.migrated) next();