rudeshark.net/src/misc/app-lock.ts
syuilo f1ef85b636
feat(server): Fetch icon url of an instance (#6591)
* feat(server): Fetch icon url of an instance

Resolve #6589

* chore: Rename the function
2020-07-26 11:04:07 +09:00

31 lines
821 B
TypeScript

import redis from '../db/redis';
import { promisify } from 'util';
/**
* Retry delay (ms) for lock acquisition
*/
const retryDelay = 100;
const lock: (key: string, timeout?: number) => Promise<() => void>
= redis
? promisify(require('redis-lock')(redis, 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);
}