与nodejs worker_threads模块一起使用时广播频道问题

Question

I am writing a nodejs script. In that I have created a worker using worker_threads and a BroadcastChannel. I am not able to send message from my main thread to worker threads. However, I am able to send message from Worker to main thread.

Following is my code for main.js

 let worker = new Worker('worker.js')
 let channel = new BroadcastChannel('testChannel', { 
   type: 'node', 
   webWorkerSupport: true
 })

 channel.postMessage('sending message to worker')

 channel.onmessage  =  message =>  {
 console.log('received message in channel main')
   console.log(message)
 }  

Following is the code in worker.js

 let channel = new BroadcastChannel('testChannel', {
   type: 'node', 
   webWorkerSupport: true
 })

 channel.onmessage = message => {
   console.log('received message in channel')
   console.log(message)
 }

 channel.postMessage('from worker')
`

Answer 1

You will need to add another BroadcastChannel object for incoming messages.

Example (main.js):

let broadcastingChannel = new BroadcastChannel('testChannel', { 
    type: 'node', 
    webWorkerSupport: true
});

broadcastingChannel.postMessage('sending message to worker')


let incomingChannel = new BroadcastChannel('testChannel', { 
    type: 'node', 
    webWorkerSupport: true
});

incomingChannel.onmessage = message => {
    console.log('received message in channel main')
    console.log(message)
};