How to use promiseRejectionTracker method of eventloop Package

Best K6 code snippet using eventloop.promiseRejectionTracker

eventloop.go

Source:eventloop.go Github

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...37 wakeupCh: make(chan struct{}, 1),38 pendingPromiseRejections: make(map[*goja.Promise]struct{}),39 vu: vu,40 }41 vu.Runtime().SetPromiseRejectionTracker(e.promiseRejectionTracker)42 return e43}44func (e *EventLoop) wakeup() {45 select {46 case e.wakeupCh <- struct{}{}:47 default:48 }49}50// RegisterCallback register that a callback will be invoked on the loop, preventing it from returning/finishing.51// The returned function, upon invocation, will queue its argument and wakeup the loop if needed.52// If the eventLoop has since stopped, it will not be executed.53// This function *must* be called from within running on the event loop, but its result can be called from anywhere.54func (e *EventLoop) RegisterCallback() func(func() error) {55 e.lock.Lock()56 e.registeredCallbacks++57 e.lock.Unlock()58 return func(f func() error) {59 e.lock.Lock()60 e.queue = append(e.queue, f)61 e.registeredCallbacks--62 e.lock.Unlock()63 e.wakeup()64 }65}66func (e *EventLoop) promiseRejectionTracker(p *goja.Promise, op goja.PromiseRejectionOperation) {67 // No locking necessary here as the goja runtime will call this synchronously68 // Read Notes on https://tc39.es/ecma262/#sec-host-promise-rejection-tracker69 if op == goja.PromiseRejectionReject {70 e.pendingPromiseRejections[p] = struct{}{}71 } else { // goja.PromiseRejectionHandle so a promise that was previously rejected without handler now got one72 delete(e.pendingPromiseRejections, p)73 }74}75func (e *EventLoop) popAll() (queue []func() error, awaiting bool) {76 e.lock.Lock()77 queue = e.queue78 e.queue = make([]func() error, 0, len(queue))79 awaiting = e.registeredCallbacks != 080 e.lock.Unlock()...

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promiseRejectionTracker

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1import (2func main() {3 c := make(chan struct{}, 0)4 js.Global().Set("promiseRejectionTracker", js.NewCallback(func(args []js.Value) {5 fmt.Println("Rejection happened")6 }))7}8 var promise = new Promise((resolve, reject) => {9 reject("Promise rejected")10 })

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promiseRejectionTracker

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1import (2func main() {3 promiseRejectionTracker := js.Global().Get("EventLoop").Get("promiseRejectionTracker")4 callback := js.FuncOf(func(this js.Value, args []js.Value) interface{} {5 fmt.Println("Promise object: ", promise)6 fmt.Println("Reason object: ", reason)7 fmt.Println("Promise state: ", state)8 })9 promiseRejectionTracker.Invoke(callback)10}11Promise object: Promise {[[PromiseStatus]]: "rejected", [[PromiseValue]]: "Error: Something went wrong"}

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promiseRejectionTracker

Using AI Code Generation

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1eventloop.promiseRejectionTracker()2{3}4eventloop.promiseRejectionTracker()5{6}7eventloop.promiseRejectionTracker()8{9}10eventloop.promiseRejectionTracker()11{12}13eventloop.promiseRejectionTracker()14{15}16eventloop.promiseRejectionTracker()17{18}19eventloop.promiseRejectionTracker()20{21}22eventloop.promiseRejectionTracker()23{24}25eventloop.promiseRejectionTracker()26{27}28eventloop.promiseRejectionTracker()29{30}31eventloop.promiseRejectionTracker()32{33}34eventloop.promiseRejectionTracker()35{36}37eventloop.promiseRejectionTracker()38{39}

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promiseRejectionTracker

Using AI Code Generation

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1const {EventLoop} = require('eventloop');2const eventloop = new EventLoop();3const promise = new Promise((resolve, reject) => {4 reject('error');5});6eventloop.promiseRejectionTracker(promise, 'reject');7eventloop.on('promiseRejectionTracker', (promise, status) => {8 console.log(promise, status);9});10const {EventLoop} = require('eventloop');11const eventloop = new EventLoop();12const promise = new Promise((resolve, reject) => {13 reject('error');14});15eventloop.promiseRejectionTracker(promise, 'reject');16eventloop.on('promiseRejectionTracker', (promise, status) => {17 console.log(promise, status);18});19const {EventLoop} = require('eventloop');20const eventloop = new EventLoop();21const promise = new Promise((resolve, reject) => {22 reject('error');23});24eventloop.promiseRejectionTracker(promise, 'reject');25eventloop.on('promiseRejectionTracker', (promise, status) => {26 console.log(promise, status);27});28const {EventLoop} = require('eventloop');29const eventloop = new EventLoop();30const promise = new Promise((resolve, reject) => {31 reject('error');32});33eventloop.promiseRejectionTracker(promise, 'reject');34eventloop.on('promiseRejectionTracker', (promise, status) => {35 console.log(promise, status);36});37const {EventLoop} = require('eventloop');38const eventloop = new EventLoop();39const promise = new Promise((resolve, reject) => {40 reject('error');41});42eventloop.promiseRejectionTracker(promise, 'reject');43eventloop.on('promiseRejectionTracker', (promise, status) => {44 console.log(promise, status);45});46const {EventLoop} = require('event

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promiseRejectionTracker

Using AI Code Generation

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1import (2func main() {3 loop := runtime.EventLoop()4 loop.On("promiseRejectionTracker", func(event *runtime.Event) {5 fmt.Println("PromiseRejectionTracker event")6 fmt.Println(event.Data["reason"])7 })8 promise := runtime.NewPromise()9 promise.Reject("An error occurred")10 loop.Run()11}

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