TestMu Conference is Back! Future of Testing + AI LambdaTest G2 Announcement

How to use UpdateListeners method of event Package

Best Testkube code snippet using event.UpdateListeners

server.go

Source:server.go

...91type updateListeners struct {92	mu        sync.Mutex93	listeners map[chan struct{}]struct{}94}95func newUpdateListeners() *updateListeners {96	return &updateListeners{97		listeners: make(map[chan struct{}]struct{}),98	}99}100func (u *updateListeners) register() <-chan struct{} {101	u.mu.Lock()102	defer u.mu.Unlock()103	ch := make(chan struct{})104	u.listeners[ch] = struct{}{}105	return ch106}107func (u *updateListeners) remove(ch chan struct{}) {108	u.mu.Lock()109	defer u.mu.Unlock()110	delete(u.listeners, ch)111	close(ch)112}113func (u *updateListeners) notify() {114	u.mu.Lock()115	defer u.mu.Unlock()116	for ch := range u.listeners {117		select {118		case ch <- struct{}{}:119		default:120			go u.remove(ch)121		}122	}123}124// Server represents an http server125type Server struct {126	addr           string127	bin            string128	builder        []string129	closed         chan struct{}130	context        build.Context131	dep            map[string]struct{}132	host           string133	port           int134	resources      *resource135	assets         *resource136	startup        []string137	target         string138	targetDir      string139	stdout         *logger.LogWriter140	stderr         *logger.BufferedLogWriter141	startupTimeout time.Duration142	watcher        *watcher.Watcher143	watcherEvents  chan watcher.Event144	pending        sync.WaitGroup145	updateListeners *updateListeners146	busy    chan bool147	ready   chan error148	stopped chan bool149	started chan bool150	exit    chan bool151	done    chan error152	mu    sync.Mutex153	error error154	once sync.Once155	cmd          *exec.Cmd156	processState uint32157	conf         serverConfig158	proxyPort    int159}160func (srv *Server) setProcessState(state processState) {161	atomic.StoreUint32(&srv.processState, uint32(state))162}163func (srv *Server) getProcessState() processState {164	return processState(atomic.LoadUint32(&srv.processState))165}166func (srv *Server) setError(err error) {167	srv.mu.Lock()168	srv.error = err169	srv.mu.Unlock()170}171func (srv *Server) getError() error {172	srv.mu.Lock()173	defer srv.mu.Unlock()174	return srv.error175}176func (srv *Server) watch(path string) error {177	return srv.watcher.Add(path, srv.watcherEvents)178}179func (srv *Server) unwatch(path string) error {180	return srv.watcher.Remove(path, srv.watcherEvents)181}182func (srv *Server) unwatchAll() error {183	srv.resources.Walk(srv.unwatch)184	srv.assets.Walk(srv.unwatch)185	for p := range srv.dep {186		srv.unwatch(p)187	}188	return nil189}190func (srv *Server) startWatcher() {191	var mu sync.Mutex192	var timer *time.Timer193	for {194		select {195		case event := <-srv.watcherEvents:196			mu.Lock()197			if timer != nil {198				timer.Stop()199				timer = nil200			}201			timer = time.AfterFunc(1*time.Second, func() {202				srv.sync(event.Name)203			})204			mu.Unlock()205		}206	}207}208func (srv *Server) runOnce() {209	srv.once.Do(func() {210		srv.busy <- true211		defer func() {212			srv.started <- true213			go srv.loop()214			<-srv.busy215		}()216		go srv.startWatcher()217		err := srv.build()218		srv.setError(err)219		if err == nil {220			err = srv.start()221			if err != nil {222				srv.setError(fmt.Errorf("%v\nError:%s\n", err, srv.stderr.ReadAll()))223			}224		}225		srv.resources.Walk(srv.watch)226		srv.assets.Walk(srv.watch)227	})228}229func newServer(context build.Context, conf serverConfig, proxyPort int, w *watcher.Watcher) (*Server, error) {230	var err error231	srv := new(Server)232	srv.conf = conf233	srv.proxyPort = proxyPort234	srv.resources, err = newResource(conf.Resources.Paths, conf.Resources.Ignore)235	if err != nil {236		return nil, err237	}238	srv.assets, err = newResource(conf.Assets.Paths, conf.Assets.Ignore)239	if err != nil {240		return nil, err241	}242	srv.startupTimeout = conf.StartupTimeout243	srv.target = strings.TrimSpace(conf.Target)244	srv.targetDir = filepath.Dir(conf.Target)245	srv.bin = strings.TrimSpace(conf.Bin)246	srv.builder = conf.Builder247	if !hasPrefix(srv.target, filepath.SplitList(context.GOPATH)) {248		// Target is not in the $GOPATH249		// Try to guess the import root(workspace) from the path250		roots := importRoots(srv.target)251		if len(roots) > 0 {252			context.GOPATH = strings.Join(append(roots, context.GOPATH), string(filepath.ListSeparator))253		}254	}255	srv.context = context256	if len(srv.builder) == 0 {257		gobin := "go"258		if len(context.GOROOT) > 0 && fileExists(context.GOROOT) {259			gobin = filepath.Join(context.GOROOT, "bin", gobin)260		}261		srv.builder = append(srv.builder, gobin, "build", "-o", srv.bin)262	}263	srv.watcher = w264	srv.watcherEvents = make(chan watcher.Event, 1)265	srv.ready = make(chan error, 1)266	srv.busy = make(chan bool, 1)267	srv.stopped = make(chan bool, 1)268	srv.started = make(chan bool, 1)269	srv.done = make(chan error, 1)270	srv.exit = make(chan bool, 1)271	srv.updateListeners = newUpdateListeners()272	srv.port = conf.Port273	srv.startup = conf.Startup274	srv.host = conf.Host275	srv.stdout = logger.NewLogWriter(os.Stdout, srv.host+"> ", log.LstdFlags)276	srv.stderr = new(logger.BufferedLogWriter)277	return srv, nil278}279func (srv *Server) testConnection(target *url.URL, timeout time.Duration) <-chan error {280	t := time.After(timeout)281	done := make(chan error, 1)282	client := &http.Client{}283	go func() {284		for {285			select {...

emitter.go

Source:emitter.go

...38	e.mutex.Lock()39	defer e.mutex.Unlock()40	e.Listeners = append(e.Listeners, listener)41}42// UpdateListeners updates listeners list43func (e *Emitter) UpdateListeners(listeners common.Listeners) {44	e.mutex.Lock()45	defer e.mutex.Unlock()46	for i, new := range listeners {47		found := false48		for j, old := range e.Listeners {49			if new.Name() == old.Name() {50				e.Listeners[j] = listeners[i]51				found = true52			}53		}54		// if listener is not registered yet we need to subscribe55		if !found {56			e.Listeners = append(e.Listeners, listeners[i])57			e.startListener(listeners[i])58		}59	}60}61// Notify notifies emitter with webhook62func (e *Emitter) Notify(event testkube.Event) {63	err := e.Bus.Publish(event)64	e.Log.Infow("event published", append(event.Log(), "error", err)...)65}66// Listen runs emitter workers responsible for sending HTTP requests67func (e *Emitter) Listen(ctx context.Context) {68	// clean after closing Emitter69	go func() {70		<-ctx.Done()71		e.Log.Warn("closing event bus")72		for _, l := range e.Listeners {73			go e.Bus.Unsubscribe(l.Name())74		}75		e.Bus.Close()76	}()77	e.mutex.Lock()78	defer e.mutex.Unlock()79	for _, l := range e.Listeners {80		go e.startListener(l)81	}82}83func (e *Emitter) startListener(l common.Listener) {84	e.Log.Infow("starting listener", l.Name(), l.Metadata())85	err := e.Bus.Subscribe(l.Name(), e.notifyHandler(l))86	if err != nil {87		e.Log.Errorw("error subscribing to event", "error", err)88	}89}90func (e *Emitter) notifyHandler(l common.Listener) bus.Handler {91	log := e.Log.With("listen-on", l.Events(), "queue-group", l.Name(), "selector", l.Selector(), "metadata", l.Metadata())92	return func(event testkube.Event) error {93		if event.Valid(l.Selector(), l.Events()) {94			l.Notify(event)95			log.Infow("listener notified", event.Log()...)96		} else {97			log.Infow("dropping event not matching selector or type", event.Log()...)98		}99		return nil100	}101}102// Reconcile reloads listeners from all registered reconcilers103func (e *Emitter) Reconcile(ctx context.Context) {104	for {105		select {106		case <-ctx.Done():107			e.Log.Infow("stopping reconciler")108			return109		default:110			listeners := e.Loader.Reconcile()111			e.UpdateListeners(listeners)112			e.Log.Debugw("reconciled listeners", e.Listeners.Log()...)113			time.Sleep(reconcileInterval)114		}115	}116}...

mouselistener.go

Source:mouselistener.go

...31//If no listener is focused, it will do the exact same thing32//with the IsHovered() function33//If no listener is focused and no listener is hovered, the34//function will update zero listener and return false35//UpdateListeners updates AT MOST ONE listener, returns true if one is updated, false otherwise36func UpdateListeners(e MouseEvent) bool {37	for _, l := range Listeners {38		if l.IsFocused() {39			l.Update(e)40			return true41		}42	}43	for _, l := range Listeners {44		if l.IsHovered(e) {45			l.Update(e)46			return true47		}48	}49	return false50}...

UpdateListeners

Using AI Code Generation

1import (2type Event struct {3    listeners []func()4}5func (e *Event) AddListener(listener func()) {6    e.listeners = append(e.listeners, listener)7}8func (e *Event) UpdateListeners() {9    for _, listener := range e.listeners {10        listener()11    }12}13func main() {14    e := &Event{}15    e.AddListener(func() {16        fmt.Println("Listener 1")17    })18    e.AddListener(func() {19        fmt.Println("Listener 2")20    })21    e.UpdateListeners()22}

UpdateListeners

Using AI Code Generation

1import "fmt"2type Event struct {3	listeners []func(string)4}5func (e *Event) Subscribe(listener func(string)) {6	e.listeners = append(e.listeners, listener)7}8func (e *Event) UpdateListeners(data string) {9	for _, listener := range e.listeners {10		listener(data)11	}12}13func main() {14	event := Event{}15	event.Subscribe(func(data string) {16		fmt.Println("Received data: ", data)17	})18	event.UpdateListeners("Hello world")19}20import "fmt"21type Event struct {22	listeners []func(string)23}24func (e *Event) Subscribe(listener func(string)) {25	e.listeners = append(e.listeners, listener)26}27func (e *Event) Unsubscribe(listener func(string)) {28	for i, l := range e.listeners {29		if l == listener {30			e.listeners = append(e.listeners[:i], e.listeners[i+1:]...)31		}32	}33}34func (e *Event) UpdateListeners(data string) {35	for _, listener := range e.listeners {36		listener(data)37	}38}39func main() {40	event := Event{}41	event.Subscribe(func(data string) {42		fmt.Println("Received data: ", data)43	})44	event.UpdateListeners("Hello world")45	event.Unsubscribe(func(data string) {46		fmt.Println("Received data: ", data)47	})48}49import "fmt"50type Event struct {51	listeners []func(string)52}53func (e *Event) Subscribe(listener func(string)) {54	e.listeners = append(e.listeners, listener)55}56func (e *Event) UnsubscribeAll() {57	e.listeners = []func(string){}58}59func (e *Event) UpdateListeners(data string) {60	for _, listener := range e.listeners {61		listener(data)62	}63}64func main() {65	event := Event{}66	event.Subscribe(func(data string) {67		fmt.Println("Received data: ", data)68	})69	event.UpdateListeners("Hello world")70	event.UnsubscribeAll()71}

UpdateListeners

Using AI Code Generation

1import (2type Event struct {3	listeners []func(string)4}5func (e *Event) UpdateListeners(listener func(string)) {6	e.listeners = append(e.listeners, listener)7}8func (e *Event) Notify(data string) {9	for _, listener := range e.listeners {10		listener(data)11	}12}13func main() {14	event := Event{}15	event.UpdateListeners(func(data string) {16		fmt.Println("Listener 1:", data)17	})18	event.UpdateListeners(func(data string) {19		fmt.Println("Listener 2:", data)20	})21	event.Notify("hello")22	time.Sleep(time.Second)23}

UpdateListeners

Using AI Code Generation

1import (2type Event struct {3	Listeners []func(string)4}5func (e *Event) UpdateListeners(listener func(string)) {6	e.Listeners = append(e.Listeners, listener)7}8func (e *Event) Fire(s string) {9	for _, listener := range e.Listeners {10		listener(s)11	}12}13func main() {14	event := &Event{}15	event.UpdateListeners(func(s string) {16		fmt.Println("listener 1 called ", s)17	})18	event.UpdateListeners(func(s string) {19		fmt.Println("listener 2 called ", s)20	})21	event.Fire("Hello")22}23import (24type Event struct {25	Listeners []func(string)26}27func (e *Event) UpdateListeners(listener func(string)) {28	e.Listeners = append(e.Listeners, listener)29}30func (e *Event) Fire(s string) {31	for _, listener := range e.Listeners {32		listener(s)33	}34}35func main() {36	event := &Event{}37	event.UpdateListeners(func(s string) {38		fmt.Println("listener 1 called ", s)39	})40	event.UpdateListeners(func(s string) {41		fmt.Println("listener 2 called ", s)42	})43	event.Fire("Hello")44}45import (46type Event struct {47	Listeners []func(string)48}49func (e *Event) UpdateListeners(listener func(string)) {50	e.Listeners = append(e.Listeners, listener)51}52func (e *Event) Fire(s string) {53	for _, listener := range e.Listeners {54		listener(s)55	}56}57func main() {58	event := &Event{}59	event.UpdateListeners(func(s string) {60		fmt.Println("listener 1 called ", s)61	})62	event.UpdateListeners(func(s string) {63		fmt.Println("listener 2 called ", s)64	})65	event.Fire("Hello")66}

UpdateListeners

Using AI Code Generation

1import (2type Event struct {3    listeners []func(string)4}5func (e *Event) UpdateListeners(listener func(string)) {6    e.listeners = append(e.listeners, listener)7}8func (e *Event) Fire(s string) {9    for _, listener := range e.listeners {10        listener(s)11    }12}13func main() {14    e := Event{}15    e.UpdateListeners(func(s string) {16        fmt.Println("Listener 1:", s)17    })18    e.UpdateListeners(func(s string) {19        fmt.Println("Listener 2:", s)20    })21    e.Fire("Hello")22}

UpdateListeners

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello World")4	e := new(event)5	e.UpdateListeners(1)6	e.UpdateListeners(2)7	e.UpdateListeners(3)8	e.UpdateListeners(4)9	e.UpdateListeners(5)10	e.UpdateListeners(6)11	e.UpdateListeners(7)12	e.UpdateListeners(8)13	e.UpdateListeners(9)14	e.UpdateListeners(10)15	e.UpdateListeners(11)16	e.UpdateListeners(12)17	e.UpdateListeners(13)18	e.UpdateListeners(14)19	e.UpdateListeners(15)20	e.UpdateListeners(16)21	e.UpdateListeners(17)22	e.UpdateListeners(18)23	e.UpdateListeners(19)24	e.UpdateListeners(20)25	e.UpdateListeners(21)26	e.UpdateListeners(22)27	e.UpdateListeners(23)28	e.UpdateListeners(24)29	e.UpdateListeners(25)30	e.UpdateListeners(26)31	e.UpdateListeners(27)32	e.UpdateListeners(28)33	e.UpdateListeners(29)34	e.UpdateListeners(30)35	e.UpdateListeners(31)36	e.UpdateListeners(32)37	e.UpdateListeners(33)38	e.UpdateListeners(34)39	e.UpdateListeners(35)40	e.UpdateListeners(36)41	e.UpdateListeners(37)42	e.UpdateListeners(38)43	e.UpdateListeners(39)44	e.UpdateListeners(40)45	e.UpdateListeners(41)46	e.UpdateListeners(42)47	e.UpdateListeners(43)48	e.UpdateListeners(44)49	e.UpdateListeners(45)50	e.UpdateListeners(46)51	e.UpdateListeners(47)52	e.UpdateListeners(48)53	e.UpdateListeners(49)54	e.UpdateListeners(50)55	e.UpdateListeners(51)56	e.UpdateListeners(52)57	e.UpdateListeners(53)58	e.UpdateListeners(54)59	e.UpdateListeners(55)60	e.UpdateListeners(56)61	e.UpdateListeners(57)62	e.UpdateListeners(58)63	e.UpdateListeners(59)64	e.UpdateListeners(60)65	e.UpdateListeners(61)66	e.UpdateListeners(62)67	e.UpdateListeners(63)68	e.UpdateListeners(64)69	e.UpdateListeners(65)70	e.UpdateListeners(66)71	e.UpdateListeners(67)72	e.UpdateListeners(68)73	e.UpdateListeners(69)74	e.UpdateListeners(70)75	e.UpdateListeners(71)76	e.UpdateListeners(72)77	e.UpdateListeners(73)78	e.UpdateListeners(74)79	e.UpdateListeners(75)80	e.UpdateListeners(76)81	e.UpdateListeners(77)82	e.UpdateListeners(78)

UpdateListeners

Using AI Code Generation

1import (2func main() {3	config := sarama.NewConfig()4	client, err := sarama.NewClient([]string{"localhost:9092"}, config)5	if err != nil {6		panic(err)7	}8	defer client.Close()9	consumer, err := sarama.NewConsumerFromClient(client)10	if err != nil {11		panic(err)12	}13	defer consumer.Close()14	partitionList, err := consumer.Partitions(topic)15	if err != nil {16		panic(err)17	}18	for partition := range partitionList {19		pc, err := consumer.ConsumePartition(topic, int32(partition), sarama.OffsetOldest)20		if err != nil {21			panic(err)22		}23		defer pc.AsyncClose()24		for msg := range pc.Messages() {25			fmt.Printf("Partition: %d, Offset: %d, Key: %s, Value: %s26		}27	}28}

UpdateListeners

Using AI Code Generation

1import (2func main() {3	event := new(Event)4	listener := new(Listener)5	event.AddListener(listener)6	event.UpdateListeners()7}8type Event struct {9}10type Listener struct {11}12func (event *Event) AddListener(listener Listener) {13	event.listeners = append(event.listeners, listener)14}15func (event *Event) UpdateListeners() {16	for _, listener := range event.listeners {17		listener.Update()18	}19}20func (listener *Listener) Update() {21	fmt.Println("Updating listeners")22}23import (24func main() {25	event := new(Event)26	listener := new(Listener)27	event.AddListener(listener)28	event.UpdateListeners()29}30type Event struct {31}32type Listener struct {33}34func (event *Event) AddListener(listener Listener) {35	event.listeners = append(event.listeners, listener)36}37func (event *Event) UpdateListeners() {38	for _, listener := range event.listeners {39		listener.Update()40	}41}42func (listener *Listener) Update() {43	fmt.Println("Updating listeners")44}45import (46func main() {47	event := new(Event)48	listener := new(Listener)49	event.AddListener(listener)

UpdateListeners

Using AI Code Generation

1import "fmt"2func main() {3event := NewEvent()4listener := NewListener()5event.AddListener(listener)6event.Trigger("Event triggered")7listener.Update("Listener updated")8event.Trigger("Event triggered again")9}10import "fmt"11func main() {12event := NewEvent()13listener := NewListener()14event.AddListener(listener)15event.Trigger("Event triggered")16event.RemoveListener(listener)17event.Trigger("Event triggered again")18}19import "fmt"20func main() {21event := NewEvent()22listener := NewListener()23event.AddListener(listener)24event.Trigger("Event triggered")25event.RemoveAllListeners()26event.Trigger("Event triggered again")27}28import "fmt"29func main() {30event := NewEvent()31listener := NewListener()32event.AddListener(listener)33event.Trigger("Event triggered")34event.RemoveAllListeners()35event.Trigger("Event triggered again")36}37import "fmt"38func main() {39event := NewEvent()40listener := NewListener()41event.AddListener(listener)42event.Trigger("Event triggered")43event.RemoveAllListeners()44event.Trigger("Event triggered again")45}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.