/**
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* workerpool.js
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* https://github.com/josdejong/workerpool
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*
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* Offload tasks to a pool of workers on node.js and in the browser.
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*
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* @version 6.2.0
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* @date 2022-01-15
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*
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* @license
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* Copyright (C) 2014-2022 Jos de Jong <wjosdejong@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy
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* of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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/******/ (function() { // webpackBootstrap
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var __webpack_exports__ = {};
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// This entry need to be wrapped in an IIFE because it uses a non-standard name for the exports (exports).
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!function() {
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var exports = __webpack_exports__;
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var __webpack_unused_export__;
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function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
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/**
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* worker must be started as a child process or a web worker.
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* It listens for RPC messages from the parent process.
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*/
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// source of inspiration: https://github.com/sindresorhus/require-fool-webpack
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var requireFoolWebpack = eval('typeof require !== \'undefined\'' + ' ? require' + ' : function (module) { throw new Error(\'Module " + module + " not found.\') }');
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/**
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* Special message sent by parent which causes the worker to terminate itself.
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* Not a "message object"; this string is the entire message.
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*/
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var TERMINATE_METHOD_ID = '__workerpool-terminate__'; // var nodeOSPlatform = require('./environment').nodeOSPlatform;
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// create a worker API for sending and receiving messages which works both on
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// node.js and in the browser
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var worker = {
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exit: function exit() {}
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};
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if (typeof self !== 'undefined' && typeof postMessage === 'function' && typeof addEventListener === 'function') {
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// worker in the browser
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worker.on = function (event, callback) {
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addEventListener(event, function (message) {
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callback(message.data);
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});
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};
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worker.send = function (message) {
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postMessage(message);
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};
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} else if (typeof process !== 'undefined') {
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// node.js
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var WorkerThreads;
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try {
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WorkerThreads = requireFoolWebpack('worker_threads');
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} catch (error) {
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if (_typeof(error) === 'object' && error !== null && error.code === 'MODULE_NOT_FOUND') {// no worker_threads, fallback to sub-process based workers
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} else {
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throw error;
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}
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}
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if (WorkerThreads &&
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/* if there is a parentPort, we are in a WorkerThread */
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WorkerThreads.parentPort !== null) {
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var parentPort = WorkerThreads.parentPort;
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worker.send = parentPort.postMessage.bind(parentPort);
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worker.on = parentPort.on.bind(parentPort);
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} else {
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worker.on = process.on.bind(process);
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worker.send = process.send.bind(process); // register disconnect handler only for subprocess worker to exit when parent is killed unexpectedly
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worker.on('disconnect', function () {
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process.exit(1);
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});
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worker.exit = process.exit.bind(process);
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}
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} else {
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throw new Error('Script must be executed as a worker');
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}
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function convertError(error) {
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return Object.getOwnPropertyNames(error).reduce(function (product, name) {
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return Object.defineProperty(product, name, {
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value: error[name],
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enumerable: true
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});
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}, {});
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}
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/**
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* Test whether a value is a Promise via duck typing.
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* @param {*} value
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* @returns {boolean} Returns true when given value is an object
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* having functions `then` and `catch`.
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*/
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function isPromise(value) {
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return value && typeof value.then === 'function' && typeof value["catch"] === 'function';
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} // functions available externally
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worker.methods = {};
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/**
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* Execute a function with provided arguments
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* @param {String} fn Stringified function
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* @param {Array} [args] Function arguments
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* @returns {*}
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*/
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worker.methods.run = function run(fn, args) {
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var f = new Function('return (' + fn + ').apply(null, arguments);');
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return f.apply(f, args);
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};
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/**
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* Get a list with methods available on this worker
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* @return {String[]} methods
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*/
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worker.methods.methods = function methods() {
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return Object.keys(worker.methods);
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};
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var currentRequestId = null;
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worker.on('message', function (request) {
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if (request === TERMINATE_METHOD_ID) {
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return worker.exit(0);
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}
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try {
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var method = worker.methods[request.method];
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if (method) {
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currentRequestId = request.id; // execute the function
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var result = method.apply(method, request.params);
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if (isPromise(result)) {
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// promise returned, resolve this and then return
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result.then(function (result) {
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worker.send({
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id: request.id,
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result: result,
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error: null
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});
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currentRequestId = null;
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})["catch"](function (err) {
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worker.send({
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id: request.id,
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result: null,
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error: convertError(err)
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});
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currentRequestId = null;
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});
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} else {
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// immediate result
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worker.send({
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id: request.id,
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result: result,
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error: null
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});
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currentRequestId = null;
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}
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} else {
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throw new Error('Unknown method "' + request.method + '"');
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}
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} catch (err) {
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worker.send({
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id: request.id,
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result: null,
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error: convertError(err)
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});
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}
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});
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/**
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* Register methods to the worker
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* @param {Object} methods
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*/
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worker.register = function (methods) {
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if (methods) {
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for (var name in methods) {
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if (methods.hasOwnProperty(name)) {
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worker.methods[name] = methods[name];
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}
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}
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}
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worker.send('ready');
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};
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worker.emit = function (payload) {
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if (currentRequestId) {
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worker.send({
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id: currentRequestId,
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isEvent: true,
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payload: payload
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});
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}
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};
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if (true) {
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__webpack_unused_export__ = worker.register;
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__webpack_unused_export__ = worker.emit;
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}
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}();
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/******/ })()
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;
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//# sourceMappingURL=worker.js.map
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