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