node.js - 如何在 Node.js 中的两个工作线程之间创建直接通信通道

Question

new MessageChannel有没有办法在两个工作线程之间创建直接通信通道？例如：P我使用worker_threadAPI 创建了一个主线程，它创建了两个工作线程W1和W2

P -> W1
  -> W2

我想直接启用W1和之间的通信，W2而不是通过Pusing进行通信parentPort。

Answer 1

用于new MessageChannel()生成双向通信通道。

index.js

const { Worker } = require('worker_threads');

const path = require('path'); 

const w1 = new Worker(path.join(__dirname,'./worker1.js'));
const w2 = new Worker(path.join(__dirname,'./worker2.js'));

w1.once('message', value => {
    w2.postMessage({
        port: value.port
    }, [value.port]);
});

w2.once('message', value => {
    w1.postMessage({
        port: value.port
    }, [value.port]);
});

worker1.js

const { MessageChannel, parentPort,  } = require('worker_threads');

let woker2Port;
console.log('worker1 started');

const { port1, port2 } = new MessageChannel();
port1.on('message', (value) => {
    console.log(value);
});

parentPort.postMessage({
    port: port2,
}, [port2]);

parentPort.on('message', value => {
    if (value.port) {
        woker2Port = value.port;
        woker2Port.postMessage({msg:'i am worker1!'});// send msg to worker2
        return;
    }
});

worker2.js

const { MessageChannel, parentPort,  } = require('worker_threads');

let woker1Port;
console.log('worker2 started');

const { port1, port2 } = new MessageChannel();
port1.on('message', (value) => {
    console.log(value);
});

parentPort.postMessage({
    port: port2,
}, [port2]);

parentPort.on('message', value => {
    if (value.port) {
        woker1Port = value.port;
        woker1Port.postMessage({msg:'i am worker2!'});// send msg to worker1
    }
});

注意：如果您在 VSCode 中调试此代码，您将不会在worker1.js和中看到日志打印worker2.js。直接运行node index或在 ndb 中调试就可以了！