ember-introjs
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An Ember Component for intro.js
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JavaScript
/**
* workerpool.js
* https://github.com/josdejong/workerpool
*
* Offload tasks to a pool of workers on node.js and in the browser.
*
* @version 2.3.0
* @date 2017-09-30
*
* @license
* Copyright (C) 2014-2016 Jos de Jong <wjosdejong@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
(function webpackUniversalModuleDefinition(root, factory) {
if(typeof exports === 'object' && typeof module === 'object')
module.exports = factory();
else if(typeof define === 'function' && define.amd)
define([], factory);
else if(typeof exports === 'object')
exports["workerpool"] = factory();
else
root["workerpool"] = factory();
})(this, function() {
return /******/ (function(modules) { // webpackBootstrap
/******/ // The module cache
/******/ var installedModules = {};
/******/ // The require function
/******/ function __webpack_require__(moduleId) {
/******/ // Check if module is in cache
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/******/ return installedModules[moduleId].exports;
/******/ // Create a new module (and put it into the cache)
/******/ var module = installedModules[moduleId] = {
/******/ exports: {},
/******/ id: moduleId,
/******/ loaded: false
/******/ };
/******/ // Execute the module function
/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
/******/ // Flag the module as loaded
/******/ module.loaded = true;
/******/ // Return the exports of the module
/******/ return module.exports;
/******/ }
/******/ // expose the modules object (__webpack_modules__)
/******/ __webpack_require__.m = modules;
/******/ // expose the module cache
/******/ __webpack_require__.c = installedModules;
/******/ // __webpack_public_path__
/******/ __webpack_require__.p = "";
/******/ // Load entry module and return exports
/******/ return __webpack_require__(0);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/***/ (function(module, exports, __webpack_require__) {
var environment = __webpack_require__(1);
/**
* Create a new worker pool
* @param {Object} [options]
* @returns {Pool} pool
*/
exports.pool = function pool(script, options) {
var Pool = __webpack_require__(3);
return new Pool(script, options);
};
/**
* Create a worker and optionally register a set of methods to the worker.
* @param {Object} [methods]
*/
exports.worker = function worker(methods) {
var worker = __webpack_require__(9);
worker.add(methods);
};
/**
* Create a promise.
* @type {Promise} promise
*/
exports.Promise = __webpack_require__(4);
exports.platform = environment.platform;
exports.isMainThread = environment.isMainThread;
exports.cpus = environment.cpus;
/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {
// used to prevent webpack from resolving requires on node libs
var node = {require: __webpack_require__(2)};
// determines the JavaScript platform: browser or node
module.exports.platform = typeof Window !== 'undefined' || typeof WorkerGlobalScope !== 'undefined' ? 'browser' : 'node';
// determines whether the code is running in main thread or not
module.exports.isMainThread = module.exports.platform === 'browser' ? typeof Window !== 'undefined' : !process.connected;
// determines the number of cpus available
module.exports.cpus = module.exports.platform === 'browser'
? self.navigator.hardwareConcurrency
: node.require('os').cpus().length; // call node.require to prevent `os` to be required when loading with AMD
/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {
var map = {
"./Pool": 3,
"./Pool.js": 3,
"./Promise": 4,
"./Promise.js": 4,
"./WorkerHandler": 5,
"./WorkerHandler.js": 5,
"./environment": 1,
"./environment.js": 1,
"./generated/embeddedWorker": 7,
"./generated/embeddedWorker.js": 7,
"./header": 8,
"./header.js": 8,
"./worker": 9,
"./worker.js": 9
};
function webpackContext(req) {
return __webpack_require__(webpackContextResolve(req));
};
function webpackContextResolve(req) {
return map[req] || (function() { throw new Error("Cannot find module '" + req + "'.") }());
};
webpackContext.keys = function webpackContextKeys() {
return Object.keys(map);
};
webpackContext.resolve = webpackContextResolve;
module.exports = webpackContext;
webpackContext.id = 2;
/***/ }),
/* 3 */
/***/ (function(module, exports, __webpack_require__) {
var Promise = __webpack_require__(4);
var WorkerHandler = __webpack_require__(5);
var environment = __webpack_require__(1);
/**
* A pool to manage workers
* @param {String} [script] Optional worker script
* @param {Object} [options] Available options: maxWorkers: Number
* @constructor
*/
function Pool(script, options) {
if (typeof script === 'string') {
this.script = script || null;
}
else {
this.script = null;
options = script;
}
this.workers = []; // queue with all workers
this.tasks = []; // queue with tasks awaiting execution
options = options || {};
this.forkArgs = options.forkArgs || [];
this.forkOpts = options.forkOpts || {};
this.debugPortStart = options.debugPortStart || 43210;
// configuration
if (options && 'maxWorkers' in options) {
validateMaxWorkers(options.maxWorkers);
this.maxWorkers = options.maxWorkers;
}
else {
this.maxWorkers = Math.max((environment.cpus || 4) - 1, 1);
}
if (options && 'minWorkers' in options) {
if(options.minWorkers === 'max') {
this.minWorkers = Math.max((environment.cpus || 4) - 1, 1);
} else {
validateMinWorkers(options.minWorkers);
this.minWorkers = options.minWorkers;
this.maxWorkers = Math.max(this.minWorkers, this.maxWorkers); // in case minWorkers is higher than maxWorkers
}
this._ensureMinWorkers();
}
}
/**
* Execute a function on a worker.
*
* Example usage:
*
* var pool = new Pool()
*
* // call a function available on the worker
* pool.exec('fibonacci', [6])
*
* // offload a function
* function add(a, b) {
* return a + b
* };
* pool.exec(add, [2, 4])
* .then(function (result) {
* console.log(result); // outputs 6
* })
* .catch(function(error) {
* console.log(error);
* });
*
* @param {String | Function} method Function name or function.
* If `method` is a string, the corresponding
* method on the worker will be executed
* If `method` is a Function, the function
* will be stringified and executed via the
* workers built-in function `run(fn, args)`.
* @param {Array} [params] Function arguments applied when calling the function
* @return {Promise.<*, Error>} result
*/
Pool.prototype.exec = function (method, params) {
// validate type of arguments
if (params && !Array.isArray(params)) {
throw new TypeError('Array expected as argument "params"');
}
if (typeof method === 'string') {
var resolver = Promise.defer();
// add a new task to the queue
var tasks = this.tasks;
var task = {
method: method,
params: params,
resolver: resolver,
timeout: null
};
tasks.push(task);
// replace the timeout method of the Promise with our own,
// which starts the timer as soon as the task is actually started
var originalTimeout = resolver.promise.timeout
resolver.promise.timeout = function timeout (delay) {
if (tasks.indexOf(task) !== -1) {
// task is still queued -> start the timer later on
task.timeout = delay;
return resolver.promise;
}
else {
// task is already being executed -> start timer immediately
return originalTimeout.call(resolver.promise, delay);
}
}
// trigger task execution
this._next();
return resolver.promise;
}
else if (typeof method === 'function') {
// send stringified function and function arguments to worker
return this.exec('run', [String(method), params]);
}
else {
throw new TypeError('Function or string expected as argument "method"');
}
};
/**
* Create a proxy for current worker. Returns an object containing all
* methods available on the worker. The methods always return a promise.
*
* @return {Promise.<Object, Error>} proxy
*/
Pool.prototype.proxy = function () {
if (arguments.length > 0) {
throw new Error('No arguments expected');
}
var pool = this;
return this.exec('methods')
.then(function (methods) {
var proxy = {};
methods.forEach(function (method) {
proxy[method] = function () {
return pool.exec(method, Array.prototype.slice.call(arguments));
}
});
return proxy;
});
};
/**
* Creates new array with the results of calling a provided callback function
* on every element in this array.
* @param {Array} array
* @param {function} callback Function taking two arguments:
* `callback(currentValue, index)`
* @return {Promise.<Array>} Returns a promise which resolves with an Array
* containing the results of the callback function
* executed for each of the array elements.
*/
/* TODO: implement map
Pool.prototype.map = function (array, callback) {
};
*/
/**
* Grab the first task from the queue, find a free worker, and assign the
* worker to the task.
* @protected
*/
Pool.prototype._next = function () {
if (this.tasks.length > 0) {
// there are tasks in the queue
// find an available worker
var worker = this._getWorker();
if (worker) {
// get the first task from the queue
var me = this;
var task = this.tasks.shift();
// check if the task is still pending (and not cancelled -> promise rejected)
if (task.resolver.promise.pending) {
// send the request to the worker
var promise = worker.exec(task.method, task.params, task.resolver)
.then(function () {
me._next(); // trigger next task in the queue
})
.catch(function () {
// if the worker crashed and terminated, remove it from the pool
if (worker.terminated) {
me._removeWorker(worker);
// If minWorkers set, spin up new workers to replace the crashed ones
me._ensureMinWorkers();
}
me._next(); // trigger next task in the queue
});
// start queued timer now
if (typeof task.timeout === 'number') {
promise.timeout(task.timeout);
}
}
}
}
};
/**
* Get an available worker. If no worker is available and the maximum number
* of workers isn't yet reached, a new worker will be created and returned.
* If no worker is available and the maximum number of workers is reached,
* null will be returned.
*
* @return {WorkerHandler | null} worker
* @private
*/
Pool.prototype._getWorker = function() {
// find a non-busy worker
for (var i = 0, ii = this.workers.length; i < ii; i++) {
var worker = this.workers[i];
if (!worker.busy()) {
return worker;
}
}
if (this.workers.length < this.maxWorkers) {
// create a new worker
worker = new WorkerHandler(this.script, {
forkArgs: this.forkArgs,
forkOpts: this.forkOpts,
debugPort: this.debugPortStart + this.workers.length
});
this.workers.push(worker);
return worker;
}
return null;
};
/**
* Remove a worker from the pool. For example after a worker terminated for
* whatever reason
* @param {WorkerHandler} worker
* @protected
*/
Pool.prototype._removeWorker = function(worker) {
// terminate the worker (if not already terminated)
worker.terminate();
this._removeWorkerFromList(worker);
};
/**
* Remove a worker from the pool list.
* @param {WorkerHandler} worker
* @protected
*/
Pool.prototype._removeWorkerFromList = function(worker) {
// remove from the list with workers
var index = this.workers.indexOf(worker);
if (index != -1) {
this.workers.splice(index, 1);
}
};
/**
* Close all active workers. Tasks currently being executed will be finished first.
* @param {boolean} [force=false] If false (default), the workers are terminated
* after finishing all tasks currently in
* progress. If true, the workers will be
* terminated immediately.
* @param {number} [timeout] If provided and non-zero, worker termination promise will be rejected
* after timeout if worker process has not been terminated.
* @return {Promise.<void, Error>}
*/
Pool.prototype.terminate = function (force, timeout) {
var f = function (worker) {
this._removeWorkerFromList(worker);
};
var removeWorker = f.bind(this);
var promises = [];
var workers = this.workers.slice();
workers.forEach(function (worker) {
var termPromise = worker.terminateAndNotify(force, timeout)
.then(removeWorker);
promises.push(termPromise);
});
return Promise.all(promises);
};
// DEPRECATED
/**
* Close all active workers. Unlike terminate, this function does not return a promise.
* @param force
*/
Pool.prototype.clear = function (force) {
this.terminate(force);
};
/**
* Retrieve statistics on tasks and workers.
* @return {{totalWorkers: number, busyWorkers: number, idleWorkers: number, pendingTasks: number, activeTasks: number}} Returns an object with statistics
*/
Pool.prototype.stats = function () {
var totalWorkers = this.workers.length;
var busyWorkers = this.workers.filter(function (worker) {
return worker.busy();
}).length;
return {
totalWorkers: totalWorkers,
busyWorkers: busyWorkers,
idleWorkers: totalWorkers - busyWorkers,
pendingTasks: this.tasks.length,
activeTasks: busyWorkers
};
};
/**
* Ensures that a minimum of minWorkers is up and running
* @protected
*/
Pool.prototype._ensureMinWorkers = function() {
if (this.minWorkers) {
for(var i = this.workers.length; i < this.minWorkers; i++) {
this.workers.push(new WorkerHandler(this.script, {
forkArgs: this.forkArgs,
forkOpts: this.forkOpts,
debugPort: this.debugPortStart + i
}));
}
}
};
/**
* Ensure that the maxWorkers option is an integer >= 1
* @param {*} maxWorkers
* @returns {boolean} returns true maxWorkers has a valid value
*/
function validateMaxWorkers(maxWorkers) {
if (!isNumber(maxWorkers) || !isInteger(maxWorkers) || maxWorkers < 1) {
throw new TypeError('Option maxWorkers must be an integer number >= 1');
}
}
/**
* Ensure that the minWorkers option is an integer >= 0
* @param {*} minWorkers
* @returns {boolean} returns true when minWorkers has a valid value
*/
function validateMinWorkers(minWorkers) {
if (!isNumber(minWorkers) || !isInteger(minWorkers) || minWorkers < 0) {
throw new TypeError('Option minWorkers must be an integer number >= 0');
}
}
/**
* Test whether a variable is a number
* @param {*} value
* @returns {boolean} returns true when value is a number
*/
function isNumber(value) {
return typeof value === 'number';
}
/**
* Test whether a number is an integer
* @param {number} value
* @returns {boolean} Returns true if value is an integer
*/
function isInteger(value) {
return Math.round(value) == value;
}
module.exports = Pool;
/***/ }),
/* 4 */
/***/ (function(module, exports) {
'use strict';
/**
* Promise
*
* Inspired by https://gist.github.com/RubaXa/8501359 from RubaXa <trash@rubaxa.org>
*
* @param {Function} handler Called as handler(resolve: Function, reject: Function)
* @param {Promise} [parent] Parent promise for propagation of cancel and timeout
*/
function Promise(handler, parent) {
var me = this;
if (!(this instanceof Promise)) {
throw new SyntaxError('Constructor must be called with the new operator');
}
if (typeof handler !== 'function') {
throw new SyntaxError('Function parameter handler(resolve, reject) missing');
}
var _onSuccess = [];
var _onFail = [];
// status
this.resolved = false;
this.rejected = false;
this.pending = true;
/**
* Process onSuccess and onFail callbacks: add them to the queue.
* Once the promise is resolve, the function _promise is replace.
* @param {Function} onSuccess
* @param {Function} onFail
* @private
*/
var _process = function (onSuccess, onFail) {
_onSuccess.push(onSuccess);
_onFail.push(onFail);
};
/**
* Add an onSuccess callback and optionally an onFail callback to the Promise
* @param {Function} onSuccess
* @param {Function} [onFail]
* @returns {Promise} promise
*/
this.then = function (onSuccess, onFail) {
return new Promise(function (resolve, reject) {
var s = onSuccess ? _then(onSuccess, resolve, reject) : resolve;
var f = onFail ? _then(onFail, resolve, reject) : reject;
_process(s, f);
}, me);
};
/**
* Resolve the promise
* @param {*} result
* @type {Function}
*/
var _resolve = function (result) {
// update status
me.resolved = true;
me.rejected = false;
me.pending = false;
_onSuccess.forEach(function (fn) {
fn(result);
});
_process = function (onSuccess, onFail) {
onSuccess(result);
};
_resolve = _reject = function () {
throw new Error('Promise is already resolved');
};
return me;
};
/**
* Reject the promise
* @param {Error} error
* @type {Function}
*/
var _reject = function (error) {
// update status
me.resolved = false;
me.rejected = true;
me.pending = false;
_onFail.forEach(function (fn) {
fn(error);
});
_process = function (onSuccess, onFail) {
onFail(error);
};
_resolve = _reject = function () {
throw new Error('Promise is already resolved');
};
return me;
};
/**
* Cancel te promise. This will reject the promise with a CancellationError
* @returns {Promise} self
*/
this.cancel = function () {
if (parent) {
parent.cancel();
}
else {
_reject(new CancellationError());
}
return me;
};
/**
* Set a timeout for the promise. If the promise is not resolved within
* the time, the promise will be cancelled and a TimeoutError is thrown.
* If the promise is resolved in time, the timeout is removed.
* @param {number} delay Delay in milliseconds
* @returns {Promise} self
*/
this.timeout = function (delay) {
if (parent) {
parent.timeout(delay);
}
else {
var timer = setTimeout(function () {
_reject(new TimeoutError('Promise timed out after ' + delay + ' ms'));
}, delay);
me.always(function () {
clearTimeout(timer);
});
}
return me;
};
// attach handler passing the resolve and reject functions
handler(function (result) {
_resolve(result);
}, function (error) {
_reject(error);
});
}
/**
* Execute given callback, then call resolve/reject based on the returned result
* @param {Function} callback
* @param {Function} resolve
* @param {Function} reject
* @returns {Function}
* @private
*/
function _then(callback, resolve, reject) {
return function (result) {
try {
var res = callback(result);
if (res && typeof res.then === 'function' && typeof res['catch'] === 'function') {
// method returned a promise
res.then(resolve, reject);
}
else {
resolve(res);
}
}
catch (error) {
reject(error);
}
}
}
/**
* Add an onFail callback to the Promise
* @param {Function} onFail
* @returns {Promise} promise
*/
Promise.prototype['catch'] = function (onFail) {
return this.then(null, onFail);
};
// TODO: add support for Promise.catch(Error, callback)
// TODO: add support for Promise.catch(Error, Error, callback)
/**
* Execute given callback when the promise either resolves or rejects.
* @param {Function} fn
* @returns {Promise} promise
*/
Promise.prototype.always = function (fn) {
return this.then(fn, fn);
};
/**
* Create a promise which resolves when all provided promises are resolved,
* and fails when any of the promises resolves.
* @param {Promise[]} promises
* @returns {Promise} promise
*/
Promise.all = function (promises){
return new Promise(function (resolve, reject) {
var remaining = promises.length,
results = [];
if (remaining) {
promises.forEach(function (p, i) {
p.then(function (result) {
results[i] = result;
remaining--;
if (remaining == 0) {
resolve(results);
}
}, function (error) {
remaining = 0;
reject(error);
});
});
}
else {
resolve(results);
}
});
};
/**
* Create a promise resolver
* @returns {{promise: Promise, resolve: Function, reject: Function}} resolver
*/
Promise.defer = function () {
var resolver = {};
resolver.promise = new Promise(function (resolve, reject) {
resolver.resolve = resolve;
resolver.reject = reject;
});
return resolver;
};
/**
* Create a cancellation error
* @param {String} [message]
* @extends Error
*/
function CancellationError(message) {
this.message = message || 'promise cancelled';
this.stack = (new Error()).stack;
}
CancellationError.prototype = new Error();
CancellationError.prototype.constructor = Error;
CancellationError.prototype.name = 'CancellationError';
Promise.CancellationError = CancellationError;
/**
* Create a timeout error
* @param {String} [message]
* @extends Error
*/
function TimeoutError(message) {
this.message = message || 'timeout exceeded';
this.stack = (new Error()).stack;
}
TimeoutError.prototype = new Error();
TimeoutError.prototype.constructor = Error;
TimeoutError.prototype.name = 'TimeoutError';
Promise.TimeoutError = TimeoutError;
module.exports = Promise;
/***/ }),
/* 5 */
/***/ (function(module, exports, __webpack_require__) {
var Promise = __webpack_require__(4);
var assign = __webpack_require__(6);
// determine environment
var environment = __webpack_require__(1);
// used to prevent webpack from resolving requires on node libs
var node = {require: __webpack_require__(2)};
// get the default worker script
function getDefaultWorker() {
if (environment.platform == 'browser') {
// test whether the browser supports all features that we need
if (typeof Blob === 'undefined') {
throw new Error('Blob not supported by the browser');
}
if (!window.URL || typeof window.URL.createObjectURL !== 'function') {
throw new Error('URL.createObjectURL not supported by the browser');
}
// use embedded worker.js
var blob = new Blob([__webpack_require__(7)], {type: 'text/javascript'});
return window.URL.createObjectURL(blob);
}
else {
// use external worker.js in current directory
return __dirname + '/worker.js';
}
}
// add debug flags to child processes if the node inspector is active
function resolveForkOptions(opts) {
opts = opts || {};
var processExecArgv = process.execArgv.join(' ');
var inspectorActive = processExecArgv.indexOf('--inspect') !== -1;
var debugBrk = processExecArgv.indexOf('--debug-brk') !== -1;
var execArgv = [];
if (inspectorActive) {
execArgv.push('--inspect=' + opts.debugPort);
if (debugBrk) {
execArgv.push('--debug-brk');
}
}
return assign({}, opts, {
forkArgs: opts.forkArgs,
forkOpts: assign({}, opts.forkOpts, {
execArgv: (opts.forkOpts && opts.forkOpts.execArgv || [])
.concat(execArgv)
})
});
}
/**
* Converts a serialized error to Error
* @param {Object} obj Error that has been serialized and parsed to object
* @return {Error} The equivalent Error.
*/
function objectToError (obj) {
var temp = new Error('')
var props = Object.keys(obj)
for (var i = 0; i < props.length; i++) {
temp[props[i]] = obj[props[i]]
}
return temp
}
/**
* A WorkerHandler controls a single worker. This worker can be a child process
* on node.js or a WebWorker in a browser environment.
* @param {String} [script] If no script is provided, a default worker with a
* function run will be created.
* @constructor
*/
function WorkerHandler(script, options) {
this.script = script || getDefaultWorker();
var forkOptions;
if (environment.platform == 'browser') {
// check whether Worker is supported by the browser
// Workaround for a bug in PhantomJS (Or QtWebkit): https://github.com/ariya/phantomjs/issues/14534
if (typeof Worker !== 'function' && (typeof Worker !== 'object' || typeof Worker.prototype.constructor !== 'function')) {
throw new Error('Web workers not supported by the browser');
}
// create the web worker
this.worker = new Worker(this.script);
// add node.js API to the web worker
this.worker.on = function (event, callback) {
this.addEventListener(event, function (message) {
callback(message.data);
});
};
this.worker.send = function (message) {
this.postMessage(message);
};
}
else {
// on node.js, create a child process
forkOptions = resolveForkOptions(options);
// call node.require to prevent child_process to be required when loading with AMD
this.worker = node.require('child_process').fork(
this.script,
forkOptions.forkArgs,
forkOptions.forkOpts
);
}
var me = this;
// The ready message is only sent if the worker.add method is called (And the default script is not used)
if (!script) {
this.worker.ready = true;
}
// queue for requests that are received before the worker is ready
this.requestQueue = [];
this.worker.on('message', function (response) {
if (typeof response === 'string' && response === 'ready') {
me.worker.ready = true;
dispatchQueuedRequests();
} else {
// find the task from the processing queue, and run the tasks callback
var id = response.id;
var task = me.processing[id];
if (task) {
// remove the task from the queue
delete me.processing[id];
// test if we need to terminate
if (me.terminating) {
// complete worker termination if all tasks are finished
me.terminate();
}
// resolve the task's promise
if (response.error) {
task.resolver.reject(objectToError(response.error));
}
else {
task.resolver.resolve(response.result);
}
}
}
});
// reject all running tasks on worker error
function onError(error) {
me.terminated = true;
if (me.terminating && me.terminationHandler) {
me.terminationHandler(me);
}
me.terminating = false;
for (var id in me.processing) {
if (me.processing.hasOwnProperty(id)) {
me.processing[id].resolver.reject(error);
}
}
me.processing = {};
}
// send all queued requests to worker
function dispatchQueuedRequests()
{
me.requestQueue.forEach(me.worker.send.bind(me.worker));
me.requestQueue = [];
}
// listen for worker messages error and exit
this.worker.on('error', onError);
this.worker.on('exit', function () {
var error = new Error('Worker terminated unexpectedly');
onError(error);
});
this.processing = {}; // queue with tasks currently in progress
this.terminating = false;
this.terminated = false;
this.terminationHandler = null;
this.lastId = 0;
}
/**
* Get a list with methods available on the worker.
* @return {Promise.<String[], Error>} methods
*/
WorkerHandler.prototype.methods = function () {
return this.exec('methods');
};
/**
* Execute a method with given parameters on the worker
* @param {String} method
* @param {Array} [params]
* @param {{resolve: Function, reject: Function}} [resolver]
* @return {Promise.<*, Error>} result
*/
WorkerHandler.prototype.exec = function(method, params, resolver) {
if (!resolver) {
resolver = Promise.defer();
}
// generate a unique id for the task
var id = ++this.lastId;
// register a new task as being in progress
this.processing[id] = {
id: id,
resolver: resolver
};
// build a JSON-RPC request
var request = {
id: id,
method: method,
params: params
};
if (this.terminated) {
resolver.reject(new Error('Worker is terminated'));
} else if (this.worker.ready) {
// send the request to the worker
this.worker.send(request);
} else {
this.requestQueue.push(request);
}
// on cancellation, force the worker to terminate
var me = this;
resolver.promise
.catch(function (error) {
if (error instanceof Promise.CancellationError || error instanceof Promise.TimeoutError) {
// remove this task from the queue. It is already rejected (hence this
// catch event), and else it will be rejected again when terminating
delete me.processing[id];
// terminate worker
me.terminate(true);
}
});
return resolver.promise;
};
/**
* Test whether the worker is working or not
* @return {boolean} Returns true if the worker is busy
*/
WorkerHandler.prototype.busy = function () {
return Object.keys(this.processing).length > 0;
};
/**
* Terminate the worker.
* @param {boolean} [force=false] If false (default), the worker is terminated
* after finishing all tasks currently in
* progress. If true, the worker will be
* terminated immediately.
* @param {function} [callback=null] If provided, will be called when process terminates.
*/
WorkerHandler.prototype.terminate = function (force, callback) {
if (force) {
// cancel all tasks in progress
for (var id in this.processing) {
if (this.processing.hasOwnProperty(id)) {
this.processing[id].resolver.reject(new Error('Worker terminated'));
}
}
this.processing = {};
}
if (typeof callback === 'function') {
this.terminationHandler = callback;
}
if (!this.busy()) {
// all tasks are finished. kill the worker
if (this.worker) {
if (typeof this.worker.kill === 'function') {
this.worker.kill(); // child process
}
else if (typeof this.worker.terminate === 'function') {
this.worker.terminate(); // web worker
}
else {
throw new Error('Failed to terminate worker');
}
this.worker = null;
}
this.terminating = false;
this.terminated = true;
if (this.terminationHandler) {
this.terminationHandler(this);
}
}
else {
// we can't terminate immediately, there are still tasks being executed
this.terminating = true;
}
};
/**
* Terminate the worker, returning a Promise that resolves when the termination has been done.
* @param {boolean} [force=false] If false (default), the worker is terminated
* after finishing all tasks currently in
* progress. If true, the worker will be
* terminated immediately.
* @param {number} [timeout] If provided and non-zero, worker termination promise will be rejected
* after timeout if worker process has not been terminated.
* @return {Promise.<WorkerHandler, Error>}
*/
WorkerHandler.prototype.terminateAndNotify = function (force, timeout) {
var resolver = Promise.defer();
if (timeout) {
resolver.promise.timeout = timeout;
}
this.terminate(force, function(worker) {
resolver.resolve(worker);
});
return resolver.promise;
};
module.exports = WorkerHandler;
/***/ }),
/* 6 */
/***/ (function(module, exports) {
/*
object-assign
(c) Sindre Sorhus
@license MIT
*/
'use strict';
/* eslint-disable no-unused-vars */
var getOwnPropertySymbols = Object.getOwnPropertySymbols;
var hasOwnProperty = Object.prototype.hasOwnProperty;
var propIsEnumerable = Object.prototype.propertyIsEnumerable;
function toObject(val) {
if (val === null || val === undefined) {
throw new TypeError('Object.assign cannot be called with null or undefined');
}
return Object(val);
}
function shouldUseNative() {
try {
if (!Object.assign) {
return false;
}
// Detect buggy property enumeration order in older V8 versions.
// https://bugs.chromium.org/p/v8/issues/detail?id=4118
var test1 = new String('abc'); // eslint-disable-line no-new-wrappers
test1[5] = 'de';
if (Object.getOwnPropertyNames(test1)[0] === '5') {
return false;
}
// https://bugs.chromium.org/p/v8/issues/detail?id=3056
var test2 = {};
for (var i = 0; i < 10; i++) {
test2['_' + String.fromCharCode(i)] = i;
}
var order2 = Object.getOwnPropertyNames(test2).map(function (n) {
return test2[n];
});
if (order2.join('') !== '0123456789') {
return false;
}
// https://bugs.chromium.org/p/v8/issues/detail?id=3056
var test3 = {};
'abcdefghijklmnopqrst'.split('').forEach(function (letter) {
test3[letter] = letter;
});
if (Object.keys(Object.assign({}, test3)).join('') !==
'abcdefghijklmnopqrst') {
return false;
}
return true;
} catch (err) {
// We don't expect any of the above to throw, but better to be safe.
return false;
}
}
module.exports = shouldUseNative() ? Object.assign : function (target, source) {
var from;
var to = toObject(target);
var symbols;
for (var s = 1; s < arguments.length; s++) {
from = Object(arguments[s]);
for (var key in from) {
if (hasOwnProperty.call(from, key)) {
to[key] = from[key];
}
}
if (getOwnPropertySymbols) {
symbols = getOwnPropertySymbols(from);
for (var i = 0; i < symbols.length; i++) {
if (propIsEnumerable.call(from, symbols[i])) {
to[symbols[i]] = from[symbols[i]];
}
}
}
}
return to;
};
/***/ }),
/* 7 */
/***/ (function(module, exports) {
/**
* embeddedWorker.js contains an embedded version of worker.js.
* This file is automatically generated,
* changes made in this file will be overwritten.
*/
module.exports = "!function(r){function e(n){if(o[n])return o[n].exports;var t=o[n]={exports:{},id:n,loaded:!1};return r[n].call(t.exports,t,t.exports,e),t.loaded=!0,t.exports}var o={};e.m=r,e.c=o,e.p=\"\",e(0)}([function(module,exports,__webpack_require__){function convertError(r){return Object.getOwnPropertyNames(r).reduce(function(e,o){return Object.defineProperty(e,o,{value:r[o],enumerable:!0})},{})}function isPromise(r){return r&&\"function\"==typeof r.then&&\"function\"==typeof r.catch}var worker={};if(\"undefined\"!=typeof self&&\"function\"==typeof postMessage&&\"function\"==typeof addEventListener)worker.on=function(r,e){addEventListener(r,function(r){e(r.data)})},worker.send=function(r){postMessage(r)};else{if(\"undefined\"==typeof process)throw new Error(\"Script must be executed as a worker\");worker.on=process.on.bind(process),worker.send=process.send.bind(process)}worker.methods={},worker.methods.run=function run(fn,args){var f=eval(\"(\"+fn+\")\");return f.apply(f,args)},worker.methods.methods=function(){return Object.keys(worker.methods)},worker.on(\"message\",function(r){try{var e=worker.methods[r.method];if(!e)throw new Error('Unknown method \"'+r.method+'\"');var o=e.apply(e,r.params);isPromise(o)?o.then(function(e){worker.send({id:r.id,result:e,error:null})}).catch(function(e){worker.send({id:r.id,result:null,error:convertError(e)})}):worker.send({id:r.id,result:o,error:null})}catch(e){worker.send({id:r.id,result:null,error:convertError(e)})}}),worker.register=function(r){if(r)for(var e in r)r.hasOwnProperty(e)&&(worker.methods[e]=r[e]);worker.send(\"ready\")},exports.add=worker.register}]);";
/***/ }),
/* 8 */
/***/ (function(module, exports) {
/**
* workerpool.js
* https://github.com/josdejong/workerpool
*
* Offload tasks to a pool of workers on node.js and in the browser.
*
* @version @@version
* @date @@date
*
* @license
* Copyright (C) 2014-2016 Jos de Jong <wjosdejong@gmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
/***/ }),
/* 9 */
/***/ (function(module, exports, __webpack_require__) {
/**
* worker must be started as a child process or a web worker.
* It listens for RPC messages from the parent process.
*/
// create a worker API for sending and receiving messages which works both on
// node.js and in the browser
var worker = {};
if (typeof self !== 'undefined' && typeof postMessage === 'function' && typeof addEventListener === 'function') {
// worker in the browser
worker.on = function (event, callback) {
addEventListener(event, function (message) {
callback(message.data);
})
};
worker.send = function (message) {
postMessage(message);
};
}
else if (typeof process !== 'undefined') {
// node.js
worker.on = process.on.bind(process);
worker.send = process.send.bind(process);
}
else {
throw new Error('Script must be executed as a worker');
}
function convertError(error) {
return Object.getOwnPropertyNames(error).reduce(function(product, name) {
return Object.defineProperty(product, name, {
value: error[name],
enumerable: true
});
}, {});
}
/**
* Test whether a value is a Promise via duck typing.
* @param {*} value
* @returns {boolean} Returns true when given value is an object
* having functions `then` and `catch`.
*/
function isPromise(value) {
return value && (typeof value.then === 'function') && (typeof value.catch === 'function');
}
// functions available externally
worker.methods = {};
/**
* Execute a function with provided arguments
* @param {String} fn Stringified function
* @param {Array} [args] Function arguments
* @returns {*}
*/
worker.methods.run = function run(fn, args) {
var f = eval('(' + fn + ')');
return f.apply(f, args);
};
/**
* Get a list with methods available on this worker
* @return {String[]} methods
*/
worker.methods.methods = function methods() {
return Object.keys(worker.methods);
};
worker.on('message', function (request) {
try {
var method = worker.methods[request.method];
if (method) {
// execute the function
var result = method.apply(method, request.params);
if (isPromise(result)) {
// promise returned, resolve this and then return
result
.then(function (result) {
worker.send({
id: request.id,
result: result,
error: null
});
})
.catch(function (err) {
worker.send({
id: request.id,
result: null,
error: convertError(err)
});
});
}
else {
// immediate result
worker.send({
id: request.id,
result: result,
error: null
});
}
}
else {
throw new Error('Unknown method "' + request.method + '"');
}
}
catch (err) {
worker.send({
id: request.id,
result: null,
error: convertError(err)
});
}
});
/**
* Register methods to the worker
* @param {Object} methods
*/
worker.register = function (methods) {
if (methods) {
for (var name in methods) {
if (methods.hasOwnProperty(name)) {
worker.methods[name] = methods[name];
}
}
}
worker.send('ready');
};
if (true) {
exports.add = worker.register;
}
/***/ })
/******/ ])
});
;