const {
isMainThread, parentPort
} = require('worker_threads')
-const maxInactiveTime = 1000 * 60
-
-/**
- * An example worker that will be always alive, you just need to extend this class if you want a static pool.
- * @author Alessandro Pio Ardizio
- * @since 0.0.1
- */
-class ThreadWorker {
- constructor (fn) {
- if (!fn) throw new Error('Fn parameter is mandatory')
- // keep the worker active
- if (!isMainThread) {
- this.interval =
- setInterval(() => {
- }, 10000)
- }
- parentPort.on('message', (value) => {
- if (value.parent) {
- // save the port to communicate with the main thread
- this.parent = value.parent
- } else if (value && value._id) {
- // console.log('This is the main thread ' + isMainThread)
- this.parent.postMessage({ data: fn(value), _id: value._id })
- }
- })
- }
-}
+const { AsyncResource } = require('async_hooks')
/**
* An example worker that will be always alive, you just need to extend this class if you want a static pool.<br>
* @author Alessandro Pio Ardizio
* @since 0.0.1
*/
-class DynamicWorker {
- constructor (fn) {
+class ThreadWorker extends AsyncResource {
+ constructor (fn, opts) {
+ super('worker-thread-pool:pioardi')
+ this.opts = opts || {}
+ this.maxInactiveTime = this.opts.maxInactiveTime || (1000 * 60)
this.lastTask = Date.now()
if (!fn) throw new Error('Fn parameter is mandatory')
// keep the worker active
if (!isMainThread) {
- this.interval = setInterval(this._checkAlive.bind(this), maxInactiveTime)
+ this.interval = setInterval(this._checkAlive.bind(this), this.maxInactiveTime / 2)
this._checkAlive.bind(this)()
}
parentPort.on('message', (value) => {
- if (value && value._id) {
+ if (value && value.data && value._id) {
// here you will receive messages
// console.log('This is the main thread ' + isMainThread)
- this.parent.postMessage({ data: fn(value), _id: value._id })
- this.lastTask = Date.now()
+ this.runInAsyncScope(this._run.bind(this), this, fn, value)
} else if (value.parent) {
// save the port to communicate with the main thread
// this will be received once
} else if (value.kill) {
// here is time to kill this thread, just clearing the interval
clearInterval(this.interval)
+ this.emitDestroy()
}
})
}
_checkAlive () {
- if ((Date.now() - this.lastTask) > maxInactiveTime) {
+ if ((Date.now() - this.lastTask) > this.maxInactiveTime) {
this.parent.postMessage({ kill: 1 })
}
}
+
+ _run (fn, value) {
+ try {
+ const res = fn(value.data)
+ this.parent.postMessage({ data: res, _id: value._id })
+ this.lastTask = Date.now()
+ } catch (e) {
+ this.parent.postMessage({ error: e, _id: value._id })
+ this.lastTask = Date.now()
+ }
+ }
}
module.exports.ThreadWorker = ThreadWorker
-module.exports.DynamicWorker = DynamicWorker