Extend Bree from EventEmitter and emit events when workers start, etc

I want to call the method in the main thread in the worker, and I found comlink will be a good choice, but I don’t know how to use it with bree. I need to call Comlink.wrap(worker) whenever bree starts a new worker, but there is no hooks or event to listen to. 🤔

[niftylettuce]

v1.1.17 released to npm with this added:

https://github.com/breejs/bree/releases/tag/v1.1.17

See the README for more information and examples on how to listen for when they start:

https://github.com/breejs/bree#listening-for-events

Let us know if you need anything else.

[tiaod]

Here is an example used with comlink.

// main.js
const Bree = require('bree')
const Comlink = require('comlink')
const nodeEndpoint  = require('comlink/dist/umd/node-adapter')
const bree = new Bree({
  jobs:[
    {
      name:'test',
      interval: '15s'
    }
  ]
})
const api = {
  doMath() {
    return 4;
  },
};
bree.on('worker created', name=>{
  Comlink.expose(api, nodeEndpoint(bree.workers[name]))
})
bree.start()

// jobs/test.js
const { parentPort } = require('worker_threads');
const Comlink = require('comlink')
const nodeEndpoint = require('comlink/dist/umd/node-adapter')
// get api from parent
const api = Comlink.wrap(nodeEndpoint(parentPort))
function wait(t){
  return new Promise(resolve=>setTimeout(resolve, t))
}
async function main(){
  console.log("doMath:", await api.doMath()) // call the api
  await wait(10000)
  console.log('done!')
}
main()