Method getPromise

lib/CacheFacade.js:295–305

* Returns promise with the data. * @template T * @param {string} identifier the cache identifier * @param {Etag | null} etag the etag * @returns {Promise<T>} promise with the data

(identifier, etag)

	 * @returns {Promise<T>} promise with the data
	 */
	getPromise(identifier, etag) {
		return new Promise((resolve, reject) => {
			this._cache.get(`${this._name}|${identifier}`, etag, (err, data) => {
				if (err) {
					reject(err);
				} else {
					resolve(data);
				}
			});
		});
	}

	/**
	 * Processes the provided identifier.