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How to use RegisterCallback method of eventloop Package

Best K6 code snippet using eventloop.RegisterCallback

eventloop.go

Source:eventloop.go

...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-tracker...

queuer_test.go

Source:queuer_test.go

...19		CtxField:     context.Background(),20		StateField:   nil,21	}22	loop := eventloop.New(vu)23	fq := New(loop.RegisterCallback)24	var i int25	require.NoError(t, rt.Set("a", func() {26		fq.Queue(func() error {27			fq.Queue(func() error {28				fq.Queue(func() error {29					i++30					fq.Close()31					return nil32				})33				i++34				return nil35			})36			i++37			return nil38		})39	}))40	err := loop.Start(func() error {41		_, err := vu.Runtime().RunString(`a()`)42		return err43	})44	require.NoError(t, err)45	require.Equal(t, i, 3)46}47func TestTwoTaskQueues(t *testing.T) {48	// try to find any kind of races through running multiple queues and having them race with each other49	t.Parallel()50	rt := goja.New()51	ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond*100)52	t.Cleanup(cancel)53	vu := &modulestest.VU{54		RuntimeField: rt,55		CtxField:     ctx,56	}57	loop := eventloop.New(vu)58	fq := New(loop.RegisterCallback)59	fq2 := New(loop.RegisterCallback)60	var i int61	incrimentI := func() { i++ }62	var j int63	incrimentJ := func() { j++ }64	var k int65	incrimentK := func() { k++ }66	require.NoError(t, rt.Set("a", func() {67		for s := 0; s < 5; s++ { // make multiple goroutines68			go func() {69				for p := 0; p < 1000000; p++ {70					fq.Queue(func() error { // queue a task to increment integers71						incrimentI()72						incrimentJ()73						return nil...

timers_test.go

Source:timers_test.go

...23	var log []string24	require.NoError(t, rt.Set("timers", m.Exports().Named))25	require.NoError(t, rt.Set("print", func(s string) { log = append(log, s) }))26	loop := eventloop.New(vu)27	vu.RegisterCallbackField = loop.RegisterCallback28	err := loop.Start(func() error {29		_, err := vu.Runtime().RunString(`30      timers.setTimeout(()=> {31        print("in setTimeout")32      })33      print("outside setTimeout")34      `)35		return err36	})37	require.NoError(t, err)38	require.Equal(t, []string{"outside setTimeout", "in setTimeout"}, log)39}40func TestSetInterval(t *testing.T) {41	t.Parallel()42	rt := goja.New()43	vu := &modulestest.VU{44		RuntimeField: rt,45		InitEnvField: &common.InitEnvironment{},46		CtxField:     context.Background(),47		StateField:   nil,48	}49	m, ok := New().NewModuleInstance(vu).(*Timers)50	require.True(t, ok)51	var log []string52	require.NoError(t, rt.Set("timers", m.Exports().Named))53	require.NoError(t, rt.Set("print", func(s string) { log = append(log, s) }))54	require.NoError(t, rt.Set("sleep10", func() { time.Sleep(10 * time.Millisecond) }))55	loop := eventloop.New(vu)56	vu.RegisterCallbackField = loop.RegisterCallback57	err := loop.Start(func() error {58		_, err := vu.Runtime().RunString(`59      var i = 0;60      let s = timers.setInterval(()=> {61        sleep10();62        if (i>1) {63          print("in setInterval");64          timers.clearInterval(s);65        }66        i++;67      }, 1);68      print("outside setInterval")69      `)70		return err...

RegisterCallback

Using AI Code Generation

1import (2var (3	totalConn = atomic.NewInt32(0)4	totalBytesRead = atomic.NewInt32(0)5	totalBytesWrite = atomic.NewInt32(0)6	totalMessages = atomic.NewInt32(0)7	totalMessagesRead = atomic.NewInt32(0)8	totalMessagesWrite = atomic.NewInt32(0)9	totalMessagesSize = atomic.NewInt32(0)10	totalMessagesReadSize = atomic.NewInt32(0)11	totalMessagesWriteSize = atomic.NewInt32(0)12	totalMessagesReadCount = atomic.NewInt32(0)13	totalMessagesWriteCount = atomic.NewInt32(0)14	totalMessagesReadSizeCount = atomic.NewInt32(0)15	totalMessagesWriteSizeCount = atomic.NewInt32(0)16func main() {17	el := eventloop.New(&eventloop.Options{18	})19	srv := gev.NewServer(el,20		gev.Network("tcp"),21		gev.Address(":8080"),22		gev.NumLoops(1),23		gev.NumEventLoopWorker(1),24		gev.NumEventLoopWorker(1),25		gev.Plugin(websocket.New()),

RegisterCallback

Using AI Code Generation

1import (2func main() {3	el := eventloop.NewEventLoop()4	el.RegisterCallback(func(fd int, events uint32) {5		log.Printf("fd=%d, events=%d", fd, events)6	})7	s := gev.NewServer(el,8		gev.Network("tcp"),9		gev.Address(":8080"),10		gev.NumLoops(1),11		gev.NumEventLoopWorker(1),12	s.SetConnectionCallback(func(c *connection.Connection) {13		log.Printf("New connection: %s", c.PeerAddr().String())14	})15	if err := s.Start(); err != nil {16		log.Fatalf("start server failed: %v", err)17	}18	conn, err := net.DialTimeout("tcp", ":8080", 5*time.Second)19	if err != nil {20		log.Fatalf("dial failed: %v", err)21	}22	if err := conn.Close(); err != nil {23		log.Fatalf("close failed: %v", err)24	}25	if err := s.Stop(); err != nil {26		log.Fatalf("stop server failed: %v", err)27	}28}29import (30func main() {31	el := eventloop.NewEventLoop()32	s := gev.NewServer(el,33		gev.Network("tcp"),34		gev.Address(":8080"),35		gev.NumLoops(1),36		gev.NumEventLoopWorker(1),37	s.RegisterCallback(func

RegisterCallback

Using AI Code Generation

1import (2var (3func main() {4    echoServer = &EchoServer{}5    echoServerPool = &EchoServerPool{}6    echoServerPool2 = &EchoServerPool2{}7    go gnet.Serve(echo

RegisterCallback

Using AI Code Generation

1func main() {2    eventloop.RegisterCallback("foo", func() {3        fmt.Println("foo")4    })5}6func main() {7    eventloop.Callback("foo")8}

RegisterCallback

Using AI Code Generation

1func main() {2    el := eventloop.NewEventLoop()3    el.RegisterCallback("myCallback", myCallback)4    el.Run()5}6func main() {7    el := eventloop.NewEventLoop()8    el.Run()9    el.Call("myCallback", "Hello", "World")10}11func main() {12    el := eventloop.NewEventLoop()13    el.Run()14    el.Call("myCallback", "Hello", "World")15}16func main() {17    el := eventloop.NewEventLoop()18    el.Run()19    el.Call("myCallback", "Hello", "World")20}21func main() {22    el := eventloop.NewEventLoop()23    el.Run()24    el.Call("myCallback", "Hello", "World")25}26func main() {27    el := eventloop.NewEventLoop()28    el.Run()29    el.Call("myCallback", "Hello", "World")30}31func main() {32    el := eventloop.NewEventLoop()33    el.Run()34    el.Call("myCallback", "Hello", "World")35}36func main() {

RegisterCallback

Using AI Code Generation

1import (2func main() {3	if len(os.Args) != 2 {4		fmt.Println("Usage: ", os.Args[0], "port")5		os.Exit(1)6	}7	server, err := goczmq.NewSocket(goczmq.Router)8	if err != nil {9		fmt.Println(err)10		os.Exit(1)11	}12	err = server.Bind(endpoint)13	if err != nil {14		fmt.Println(err)15		os.Exit(1)16	}17	poller := goczmq.NewPoller()18	poller.Add(server, goczmq.PollIn)19	poller.RegisterCallback(goczmq.PollIn, func(event goczmq.Event) error {20		msg, err := server.RecvMessage()21		if err != nil {22		}23		fmt.Println(msg)24		msg = append(msg, "World")25		server.SendMessage(msg)26	})27	poller.Start()28}29import (30func main() {31	if len(os.Args) != 2 {32		fmt.Println("Usage: ", os.Args[0], "port")33		os.Exit(1)34	}

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