vulpes/dist/helper/TimeoutHelper.js

Job management framework

"use strict";

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _get = function get(object, property, receiver) { if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { return get(parent, property, receiver); } } else if ("value" in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } };

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var ms = require("ms");
var VError = require("verror");
var Helper = require("./Helper.js");

var _require = require("../time.js"),
    getTimestamp = _require.getTimestamp;

var _require2 = require("../symbols.js"),
    ERROR_CODE_INVALID_JOB_STATUS = _require2.ERROR_CODE_INVALID_JOB_STATUS,
    JOB_RESULT_TYPE_TIMEOUT = _require2.JOB_RESULT_TYPE_TIMEOUT,
    JOB_STATUS_RUNNING = _require2.JOB_STATUS_RUNNING;

var PROCESSING_LIMIT = 50;

/**
 * Helper for timing-out jobs
 * @augments Helper
 * @memberof module:Vulpes
 */

var TimeoutHelper = function (_Helper) {
    _inherits(TimeoutHelper, _Helper);

    function TimeoutHelper() {
        var interval = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : ms("15s");

        _classCallCheck(this, TimeoutHelper);

        var _this = _possibleConstructorReturn(this, (TimeoutHelper.__proto__ || Object.getPrototypeOf(TimeoutHelper)).call(this));

        _this._interval = interval;
        return _this;
    }

    _createClass(TimeoutHelper, [{
        key: "attach",
        value: function attach(service) {
            var _this2 = this;

            _get(TimeoutHelper.prototype.__proto__ || Object.getPrototypeOf(TimeoutHelper.prototype), "attach", this).call(this, service);
            this._timer = setInterval(this.checkJobs.bind(this), this._interval);
            setTimeout(function () {
                return _this2.checkJobs();
            }, 0);
        }
    }, {
        key: "checkJobs",
        value: function checkJobs() {
            var _this3 = this;

            this.service.queryJobs({
                timeLimit: function timeLimit(_timeLimit) {
                    return _timeLimit !== null;
                },
                status: JOB_STATUS_RUNNING
            }).then(function (runningJobs) {
                return runningJobs.length > PROCESSING_LIMIT ? runningJobs.splice(0, PROCESSING_LIMIT) : runningJobs;
            }).then(function (runningJobs) {
                var work = Promise.resolve();
                runningJobs.forEach(function (job) {
                    work = work.then(function () {
                        var now = getTimestamp();
                        if (now - job.times.started >= job.timeLimit) {
                            return _this3.service.stopJob(job.id, JOB_RESULT_TYPE_TIMEOUT).catch(function (err) {
                                var info = VError.info(err);
                                if (info && info.code === ERROR_CODE_INVALID_JOB_STATUS) {
                                    // Bob status was changed while the helper was
                                    // preparing - we can ignore this error..
                                    return;
                                }
                                throw err;
                            });
                        }
                    });
                });
            });
        }
    }, {
        key: "shutdown",
        value: function shutdown() {
            clearInterval(this._timer);
            _get(TimeoutHelper.prototype.__proto__ || Object.getPrototypeOf(TimeoutHelper.prototype), "shutdown", this).call(this);
        }
    }]);

    return TimeoutHelper;
}(Helper);

module.exports = TimeoutHelper;