loopback-datasource-juggler/lib/kvao/expire.js

35 lines
1.1 KiB
JavaScript

'use strict';
const assert = require('assert');
const utils = require('../utils');
/**
* Set the TTL (time to live) in ms (milliseconds) for a given key. TTL is the
* remaining time before a key-value pair is discarded from the database.
*
* @param {String} key Key to use when searching the database.
* @param {Number} ttl TTL in ms to set for the key.
* @options {Object} options
* @callback {Function} callback
* @param {Error} err Error object.
* @promise
*
* @header KVAO.expire(key, ttl, cb)
*/
module.exports = function keyValueExpire(key, ttl, options, callback) {
if (callback == undefined && typeof options === 'function') {
callback = options;
options = {};
} else if (!options) {
options = {};
}
assert(typeof key === 'string' && key, 'key must be a non-empty string');
assert(typeof ttl === 'number' && ttl > 0, 'ttl must be a positive integer');
assert(typeof options === 'object', 'options must be an object');
callback = callback || utils.createPromiseCallback();
this.getConnector().expire(this.modelName, key, ttl, options, callback);
return callback.promise;
};