如何从Web工作者调用共享工作者？

问题描述

是否可以从Web Worker调用共享工作者？

Is it possible to call a Shared Worker from the Web Worker?

请您举个例子。

在我的情况下，我有一些网络工作者，我需要在他们之间共享单身人士服务。

In my case I have a few web workers and I need to share a singleton service between them.

推荐答案

SharedWorker 构造函数目前在 WorkerGlobalScope 中不可用，因此您将无法像在一个iframe或窗口。

The SharedWorker constructor is not currently available within the WorkerGlobalScope, so you will not be able to construct an instance like you would in an iframe or window.

你可以做的是，创建一个，并使用它在worker和sharedWorker之间进行通信。虽然这样做可以消除对实际 SharedWorker 的需求，因为您也可以使用单个 Worker 。

What you can do is, create a MessageChannel for each of your workers, and use it to communicate between the worker and sharedWorker. Though doing this would negate the need for an actual SharedWorker, since you could just as well use a single Worker instead.

示例：

var numWorkers = 4;
var sharedWorker = new Worker("worker-shared.js");

for(var i = 0; i < numWorkers; i++) {
  var dedicatedWorker = new Worker("worker-dedicated.js");
  var channel = new MessageChannel();
  dedicatedWorker.postMessage({sharedWorkerPort: channel.port1}, [channel.port1]);
  sharedWorker.postMessage({workerPort: channel.port2}, [channel.port2]);
}

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