mirror of
https://github.com/nasa/openmct.git
synced 2025-05-02 16:53:24 +00:00
93 lines
3.5 KiB
JavaScript
93 lines
3.5 KiB
JavaScript
/*****************************************************************************
|
|
* Open MCT, Copyright (c) 2014-2020, United States Government
|
|
* as represented by the Administrator of the National Aeronautics and Space
|
|
* Administration. All rights reserved.
|
|
*
|
|
* Open MCT is 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.
|
|
*
|
|
* Open MCT includes source code licensed under additional open source
|
|
* licenses. See the Open Source Licenses file (LICENSES.md) included with
|
|
* this source code distribution or the Licensing information page available
|
|
* at runtime from the About dialog for additional information.
|
|
*****************************************************************************/
|
|
|
|
/**
|
|
* This bundle contains services for managing the flow of execution,
|
|
* such as support for running web workers on background threads.
|
|
* @namespace platform/execution
|
|
*/
|
|
define(
|
|
[],
|
|
function () {
|
|
|
|
/**
|
|
* Handles the execution of WebWorkers.
|
|
* @memberof platform/execution
|
|
* @constructor
|
|
*/
|
|
function WorkerService($window, workers) {
|
|
var workerUrls = {},
|
|
sharedWorkers = {};
|
|
|
|
function addWorker(worker) {
|
|
var key = worker.key;
|
|
if (!workerUrls[key]) {
|
|
if (worker.scriptUrl) {
|
|
workerUrls[key] = [
|
|
worker.bundle.path,
|
|
worker.bundle.sources,
|
|
worker.scriptUrl
|
|
].join("/");
|
|
} else if (worker.scriptText) {
|
|
var blob = new Blob(
|
|
[worker.scriptText],
|
|
{type: 'application/javascript'}
|
|
);
|
|
workerUrls[key] = URL.createObjectURL(blob);
|
|
}
|
|
|
|
sharedWorkers[key] = worker.shared;
|
|
}
|
|
}
|
|
|
|
(workers || []).forEach(addWorker);
|
|
this.workerUrls = workerUrls;
|
|
this.sharedWorkers = sharedWorkers;
|
|
this.Worker = $window.Worker;
|
|
this.SharedWorker = $window.SharedWorker;
|
|
}
|
|
|
|
/**
|
|
* Start running a new web worker. This will run a worker
|
|
* that has been registered under the `workers` category
|
|
* of extension.
|
|
*
|
|
* This will return either a Worker or a SharedWorker,
|
|
* depending on whether a `shared` flag has been specified
|
|
* on the the extension definition for the referenced worker.
|
|
*
|
|
* @param {string} key symbolic identifier for the worker
|
|
* @returns {Worker | SharedWorker} the running Worker
|
|
*/
|
|
WorkerService.prototype.run = function (key) {
|
|
var scriptUrl = this.workerUrls[key],
|
|
Worker = this.sharedWorkers[key]
|
|
? this.SharedWorker : this.Worker;
|
|
|
|
return scriptUrl && Worker && new Worker(scriptUrl);
|
|
};
|
|
|
|
return WorkerService;
|
|
}
|
|
);
|
|
|