update deps (MisskeyIO#889)

- メンテナンスされないredis-lockを自前実装に変更
- 既にロックされている場合のリトライ間隔を調整

packages/backend/src/misc/distributed-lock.ts

@@ -0,0 +1,44 @@
+import * as Redis from 'ioredis';
+
+export async function acquireDistributedLock(
+	redis: Redis.Redis,
+	name: string,
+	timeout: number,
+	maxRetries: number,
+	retryInterval: number,
+): Promise<() => Promise<void>> {
+	const lockKey = `lock:${name}`;
+	const identifier = Math.random().toString(36).slice(2);
+
+	let retries = 0;
+	while (retries < maxRetries) {
+		const result = await redis.set(lockKey, identifier, 'PX', timeout, 'NX');
+		if (result === 'OK') {
+			return async () => {
+				const currentIdentifier = await redis.get(lockKey);
+				if (currentIdentifier === identifier) {
+					await redis.del(lockKey);
+				}
+			};
+		}
+
+		await new Promise(resolve => setTimeout(resolve, retryInterval));
+		retries++;
+	}
+
+	throw new Error(`Failed to acquire lock ${name}`);
+}
+
+export function acquireApObjectLock(
+	redis: Redis.Redis,
+	uri: string,
+): Promise<() => Promise<void>> {
+	return acquireDistributedLock(redis, `ap-object:${uri}`, 30 * 1000, 600, 100);
+}
+
+export function acquireChartInsertLock(
+	redis: Redis.Redis,
+	name: string,
+): Promise<() => Promise<void>> {
+	return acquireDistributedLock(redis, `chart-insert:${name}`, 30 * 1000, 120, 500);
+}