refactoring

Resolve #7779

src/misc/app-lock.ts

@@ -1,31 +0,0 @@
-import { redisClient } from '../db/redis';
-import { promisify } from 'util';
-import * as redisLock from 'redis-lock';
-
-/**
- * Retry delay (ms) for lock acquisition
- */
-const retryDelay = 100;
-
-const lock: (key: string, timeout?: number) => Promise<() => void>
-	= redisClient
-	? promisify(redisLock(redisClient, retryDelay))
-	: async () => () => { };
-
-/**
- * Get AP Object lock
- * @param uri AP object ID
- * @param timeout Lock timeout (ms), The timeout releases previous lock.
- * @returns Unlock function
- */
-export function getApLock(uri: string, timeout = 30 * 1000) {
-	return lock(`ap-object:${uri}`, timeout);
-}
-
-export function getFetchInstanceMetadataLock(host: string, timeout = 30 * 1000) {
-	return lock(`instance:${host}`, timeout);
-}
-
-export function getChartInsertLock(lockKey: string, timeout = 30 * 1000) {
-	return lock(`chart-insert:${lockKey}`, timeout);
-}