45 lines
1.2 KiB
TypeScript
45 lines
1.2 KiB
TypeScript
import { promisify } from 'node:util';
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import { Inject, Injectable } from '@nestjs/common';
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import redisLock from 'redis-lock';
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import * as Redis from 'ioredis';
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import { DI } from '@/di-symbols.js';
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import { bindThis } from '@/decorators.js';
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/**
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* Retry delay (ms) for lock acquisition
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*/
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const retryDelay = 100;
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@Injectable()
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export class AppLockService {
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private lock: (key: string, timeout?: number, _?: (() => Promise<void>) | undefined) => Promise<() => void>;
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constructor(
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@Inject(DI.redis)
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private redisClient: Redis.Redis,
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) {
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this.lock = promisify(redisLock(this.redisClient, retryDelay));
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}
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/**
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* Get AP Object lock
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* @param uri AP object ID
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* @param timeout Lock timeout (ms), The timeout releases previous lock.
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* @returns Unlock function
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*/
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@bindThis
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public getApLock(uri: string, timeout = 30 * 1000): Promise<() => void> {
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return this.lock(`ap-object:${uri}`, timeout);
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}
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@bindThis
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public getFetchInstanceMetadataLock(host: string, timeout = 30 * 1000): Promise<() => void> {
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return this.lock(`instance:${host}`, timeout);
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}
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@bindThis
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public getChartInsertLock(lockKey: string, timeout = 30 * 1000): Promise<() => void> {
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return this.lock(`chart-insert:${lockKey}`, timeout);
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}
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}
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