How to use Stop method of core Package

Best K6 code snippet using core.Stop

attach_detach_test.go

Source:attach_detach_test.go Github

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...148 ns := framework.CreateTestingNamespace(namespaceName, server, t)149 defer framework.DeleteTestingNamespace(ns, server, t)150 testClient, ctrl, _, informers := createAdClients(ns, t, server, defaultSyncPeriod, defaultTimerConfig)151 pod := fakePodWithVol(namespaceName)152 podStopCh := make(chan struct{})153 if _, err := testClient.CoreV1().Nodes().Create(node); err != nil {154 t.Fatalf("Failed to created node : %v", err)155 }156 go informers.Core().V1().Nodes().Informer().Run(podStopCh)157 if _, err := testClient.CoreV1().Pods(ns.Name).Create(pod); err != nil {158 t.Errorf("Failed to create pod : %v", err)159 }160 podInformer := informers.Core().V1().Pods().Informer()161 go podInformer.Run(podStopCh)162 // start controller loop163 stopCh := make(chan struct{})164 go informers.Core().V1().PersistentVolumeClaims().Informer().Run(stopCh)165 go informers.Core().V1().PersistentVolumes().Informer().Run(stopCh)166 initCSIObjects(stopCh, informers)167 go ctrl.Run(stopCh)168 waitToObservePods(t, podInformer, 1)169 podKey, err := cache.MetaNamespaceKeyFunc(pod)170 if err != nil {171 t.Fatalf("MetaNamespaceKeyFunc failed with : %v", err)172 }173 podInformerObj, _, err := podInformer.GetStore().GetByKey(podKey)174 if err != nil {175 t.Fatalf("Pod not found in Pod Informer cache : %v", err)176 }177 waitForPodsInDSWP(t, ctrl.GetDesiredStateOfWorld())178 // let's stop pod events from getting triggered179 close(podStopCh)180 err = podInformer.GetStore().Delete(podInformerObj)181 if err != nil {182 t.Fatalf("Error deleting pod : %v", err)183 }184 waitToObservePods(t, podInformer, 0)185 // the populator loop turns every 1 minute186 waitForPodFuncInDSWP(t, ctrl.GetDesiredStateOfWorld(), 80*time.Second, "expected 0 pods in dsw after pod delete", 0)187 close(stopCh)188}189func initCSIObjects(stopCh chan struct{}, informers clientgoinformers.SharedInformerFactory) {190 if utilfeature.DefaultFeatureGate.Enabled(features.CSIMigration) &&191 utilfeature.DefaultFeatureGate.Enabled(features.CSINodeInfo) {192 go informers.Storage().V1beta1().CSINodes().Informer().Run(stopCh)193 }194 if utilfeature.DefaultFeatureGate.Enabled(features.CSIDriverRegistry) {195 go informers.Storage().V1beta1().CSIDrivers().Informer().Run(stopCh)196 }197}198func TestPodUpdateWithWithADC(t *testing.T) {199 _, server, closeFn := framework.RunAMaster(framework.NewIntegrationTestMasterConfig())200 defer closeFn()201 namespaceName := "test-pod-update"202 node := &v1.Node{203 ObjectMeta: metav1.ObjectMeta{204 Name: "node-sandbox",205 Annotations: map[string]string{206 util.ControllerManagedAttachAnnotation: "true",207 },208 },209 }210 ns := framework.CreateTestingNamespace(namespaceName, server, t)211 defer framework.DeleteTestingNamespace(ns, server, t)212 testClient, ctrl, _, informers := createAdClients(ns, t, server, defaultSyncPeriod, defaultTimerConfig)213 pod := fakePodWithVol(namespaceName)214 podStopCh := make(chan struct{})215 if _, err := testClient.CoreV1().Nodes().Create(node); err != nil {216 t.Fatalf("Failed to created node : %v", err)217 }218 go informers.Core().V1().Nodes().Informer().Run(podStopCh)219 if _, err := testClient.CoreV1().Pods(ns.Name).Create(pod); err != nil {220 t.Errorf("Failed to create pod : %v", err)221 }222 podInformer := informers.Core().V1().Pods().Informer()223 go podInformer.Run(podStopCh)224 // start controller loop225 stopCh := make(chan struct{})226 go informers.Core().V1().PersistentVolumeClaims().Informer().Run(stopCh)227 go informers.Core().V1().PersistentVolumes().Informer().Run(stopCh)228 initCSIObjects(stopCh, informers)229 go ctrl.Run(stopCh)230 waitToObservePods(t, podInformer, 1)231 podKey, err := cache.MetaNamespaceKeyFunc(pod)232 if err != nil {233 t.Fatalf("MetaNamespaceKeyFunc failed with : %v", err)234 }235 _, _, err = podInformer.GetStore().GetByKey(podKey)236 if err != nil {237 t.Fatalf("Pod not found in Pod Informer cache : %v", err)238 }239 waitForPodsInDSWP(t, ctrl.GetDesiredStateOfWorld())240 pod.Status.Phase = v1.PodSucceeded241 if _, err := testClient.CoreV1().Pods(ns.Name).UpdateStatus(pod); err != nil {242 t.Errorf("Failed to update pod : %v", err)243 }244 waitForPodFuncInDSWP(t, ctrl.GetDesiredStateOfWorld(), 20*time.Second, "expected 0 pods in dsw after pod completion", 0)245 close(podStopCh)246 close(stopCh)247}248func TestPodUpdateWithKeepTerminatedPodVolumes(t *testing.T) {249 _, server, closeFn := framework.RunAMaster(framework.NewIntegrationTestMasterConfig())250 defer closeFn()251 namespaceName := "test-pod-update"252 node := &v1.Node{253 ObjectMeta: metav1.ObjectMeta{254 Name: "node-sandbox",255 Annotations: map[string]string{256 util.ControllerManagedAttachAnnotation: "true",257 util.KeepTerminatedPodVolumesAnnotation: "true",258 },259 },260 }261 ns := framework.CreateTestingNamespace(namespaceName, server, t)262 defer framework.DeleteTestingNamespace(ns, server, t)263 testClient, ctrl, _, informers := createAdClients(ns, t, server, defaultSyncPeriod, defaultTimerConfig)264 pod := fakePodWithVol(namespaceName)265 podStopCh := make(chan struct{})266 if _, err := testClient.CoreV1().Nodes().Create(node); err != nil {267 t.Fatalf("Failed to created node : %v", err)268 }269 go informers.Core().V1().Nodes().Informer().Run(podStopCh)270 if _, err := testClient.CoreV1().Pods(ns.Name).Create(pod); err != nil {271 t.Errorf("Failed to create pod : %v", err)272 }273 podInformer := informers.Core().V1().Pods().Informer()274 go podInformer.Run(podStopCh)275 // start controller loop276 stopCh := make(chan struct{})277 go informers.Core().V1().PersistentVolumeClaims().Informer().Run(stopCh)278 go informers.Core().V1().PersistentVolumes().Informer().Run(stopCh)279 initCSIObjects(stopCh, informers)280 go ctrl.Run(stopCh)281 waitToObservePods(t, podInformer, 1)282 podKey, err := cache.MetaNamespaceKeyFunc(pod)283 if err != nil {284 t.Fatalf("MetaNamespaceKeyFunc failed with : %v", err)285 }286 _, _, err = podInformer.GetStore().GetByKey(podKey)287 if err != nil {288 t.Fatalf("Pod not found in Pod Informer cache : %v", err)289 }290 waitForPodsInDSWP(t, ctrl.GetDesiredStateOfWorld())291 pod.Status.Phase = v1.PodSucceeded292 if _, err := testClient.CoreV1().Pods(ns.Name).UpdateStatus(pod); err != nil {293 t.Errorf("Failed to update pod : %v", err)294 }295 waitForPodFuncInDSWP(t, ctrl.GetDesiredStateOfWorld(), 20*time.Second, "expected non-zero pods in dsw if KeepTerminatedPodVolumesAnnotation is set", 1)296 close(podStopCh)297 close(stopCh)298}299// wait for the podInformer to observe the pods. Call this function before300// running the RC manager to prevent the rc manager from creating new pods301// rather than adopting the existing ones.302func waitToObservePods(t *testing.T, podInformer cache.SharedIndexInformer, podNum int) {303 if err := wait.Poll(100*time.Millisecond, 60*time.Second, func() (bool, error) {304 objects := podInformer.GetIndexer().List()305 if len(objects) == podNum {306 return true, nil307 }308 return false, nil309 }); err != nil {310 t.Fatal(err)311 }312}313// wait for pods to be observed in desired state of world314func waitForPodsInDSWP(t *testing.T, dswp volumecache.DesiredStateOfWorld) {315 if err := wait.Poll(time.Millisecond*500, wait.ForeverTestTimeout, func() (bool, error) {316 pods := dswp.GetPodToAdd()317 if len(pods) > 0 {318 return true, nil319 }320 return false, nil321 }); err != nil {322 t.Fatalf("Pod not added to desired state of world : %v", err)323 }324}325// wait for pods to be observed in desired state of world326func waitForPodFuncInDSWP(t *testing.T, dswp volumecache.DesiredStateOfWorld, checkTimeout time.Duration, failMessage string, podCount int) {327 if err := wait.Poll(time.Millisecond*500, checkTimeout, func() (bool, error) {328 pods := dswp.GetPodToAdd()329 if len(pods) == podCount {330 return true, nil331 }332 return false, nil333 }); err != nil {334 t.Fatalf("%s but got error %v", failMessage, err)335 }336}337func createAdClients(ns *v1.Namespace, t *testing.T, server *httptest.Server, syncPeriod time.Duration, timers attachdetach.TimerConfig) (*clientset.Clientset, attachdetach.AttachDetachController, *persistentvolume.PersistentVolumeController, clientgoinformers.SharedInformerFactory) {338 config := restclient.Config{339 Host: server.URL,340 ContentConfig: restclient.ContentConfig{GroupVersion: &schema.GroupVersion{Group: "", Version: "v1"}},341 QPS: 1000000,342 Burst: 1000000,343 }344 resyncPeriod := 12 * time.Hour345 testClient := clientset.NewForConfigOrDie(&config)346 host := volumetest.NewFakeVolumeHost("/tmp/fake", nil, nil)347 plugin := &volumetest.FakeVolumePlugin{348 PluginName: provisionerPluginName,349 Host: host,350 Config: volume.VolumeConfig{},351 LastProvisionerOptions: volume.VolumeOptions{},352 NewAttacherCallCount: 0,353 NewDetacherCallCount: 0,354 Mounters: nil,355 Unmounters: nil,356 Attachers: nil,357 Detachers: nil,358 }359 plugins := []volume.VolumePlugin{plugin}360 cloud := &fakecloud.Cloud{}361 informers := clientgoinformers.NewSharedInformerFactory(testClient, resyncPeriod)362 ctrl, err := attachdetach.NewAttachDetachController(363 testClient,364 informers.Core().V1().Pods(),365 informers.Core().V1().Nodes(),366 informers.Core().V1().PersistentVolumeClaims(),367 informers.Core().V1().PersistentVolumes(),368 informers.Storage().V1beta1().CSINodes(),369 informers.Storage().V1beta1().CSIDrivers(),370 cloud,371 plugins,372 nil, /* prober */373 false,374 5*time.Second,375 timers)376 if err != nil {377 t.Fatalf("Error creating AttachDetach : %v", err)378 }379 // create pv controller380 controllerOptions := persistentvolumeoptions.NewPersistentVolumeControllerOptions()381 params := persistentvolume.ControllerParameters{382 KubeClient: testClient,383 SyncPeriod: controllerOptions.PVClaimBinderSyncPeriod,384 VolumePlugins: plugins,385 Cloud: nil,386 ClusterName: "volume-test-cluster",387 VolumeInformer: informers.Core().V1().PersistentVolumes(),388 ClaimInformer: informers.Core().V1().PersistentVolumeClaims(),389 ClassInformer: informers.Storage().V1().StorageClasses(),390 PodInformer: informers.Core().V1().Pods(),391 NodeInformer: informers.Core().V1().Nodes(),392 EnableDynamicProvisioning: false,393 }394 pvCtrl, err := persistentvolume.NewController(params)395 if err != nil {396 t.Fatalf("Failed to create PV controller: %v", err)397 }398 return testClient, ctrl, pvCtrl, informers399}400// Via integration test we can verify that if pod add401// event is somehow missed by AttachDetach controller - it still402// gets added by Desired State of World populator.403func TestPodAddedByDswp(t *testing.T) {404 _, server, closeFn := framework.RunAMaster(framework.NewIntegrationTestMasterConfig())405 defer closeFn()406 namespaceName := "test-pod-deletion"407 node := &v1.Node{408 ObjectMeta: metav1.ObjectMeta{409 Name: "node-sandbox",410 Annotations: map[string]string{411 util.ControllerManagedAttachAnnotation: "true",412 },413 },414 }415 ns := framework.CreateTestingNamespace(namespaceName, server, t)416 defer framework.DeleteTestingNamespace(ns, server, t)417 testClient, ctrl, _, informers := createAdClients(ns, t, server, defaultSyncPeriod, defaultTimerConfig)418 pod := fakePodWithVol(namespaceName)419 podStopCh := make(chan struct{})420 if _, err := testClient.CoreV1().Nodes().Create(node); err != nil {421 t.Fatalf("Failed to created node : %v", err)422 }423 go informers.Core().V1().Nodes().Informer().Run(podStopCh)424 if _, err := testClient.CoreV1().Pods(ns.Name).Create(pod); err != nil {425 t.Errorf("Failed to create pod : %v", err)426 }427 podInformer := informers.Core().V1().Pods().Informer()428 go podInformer.Run(podStopCh)429 // start controller loop430 stopCh := make(chan struct{})431 go informers.Core().V1().PersistentVolumeClaims().Informer().Run(stopCh)432 go informers.Core().V1().PersistentVolumes().Informer().Run(stopCh)433 initCSIObjects(stopCh, informers)434 go ctrl.Run(stopCh)435 waitToObservePods(t, podInformer, 1)436 podKey, err := cache.MetaNamespaceKeyFunc(pod)437 if err != nil {438 t.Fatalf("MetaNamespaceKeyFunc failed with : %v", err)439 }440 _, _, err = podInformer.GetStore().GetByKey(podKey)441 if err != nil {442 t.Fatalf("Pod not found in Pod Informer cache : %v", err)443 }444 waitForPodsInDSWP(t, ctrl.GetDesiredStateOfWorld())445 // let's stop pod events from getting triggered446 close(podStopCh)447 podNew := pod.DeepCopy()448 newPodName := "newFakepod"449 podNew.SetName(newPodName)450 err = podInformer.GetStore().Add(podNew)451 if err != nil {452 t.Fatalf("Error adding pod : %v", err)453 }454 waitToObservePods(t, podInformer, 2)455 // the findAndAddActivePods loop turns every 3 minute456 waitForPodFuncInDSWP(t, ctrl.GetDesiredStateOfWorld(), 200*time.Second, "expected 2 pods in dsw after pod addition", 2)457 close(stopCh)458}459func TestPVCBoundWithADC(t *testing.T) {460 _, server, closeFn := framework.RunAMaster(framework.NewIntegrationTestMasterConfig())...

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util.go

Source:util.go Github

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...124 if errDep = checkErrAndNetResponse(errDep, rDep, "CoreServiceApi.ListServiceDependent"); errDep != nil {125 return errDep126 }127 for i := 0; i < int(*respDep.Count); i++ {128 respStop, rStop, errStop := apiClient.CoreServiceApi.StopService(ctx, *(*respDep.Content)[i].Dependent).Body(cloudmgr.CoreStopServiceRequest{129 Force: &force,130 }).Execute()131 if errStop = checkErrAndNetResponse(errStop, rStop, "CoreServiceApi.StopService"); errStop != nil {132 return errStop133 }134 if errRefresh := waitJobComplete(ctx, apiClient.CoreJobServiceApi, respStop.GetId()); errRefresh != nil {135 return errRefresh136 }137 }138 respStop, rStop, errStop := apiClient.CoreServiceApi.StopService(ctx, id).Body(cloudmgr.CoreStopServiceRequest{139 Force: &force,140 }).Execute()141 if errStop = checkErrAndNetResponse(errStop, rStop, "CoreServiceApi.StopService"); errStop != nil {142 return errStop143 }144 if errRefresh := waitJobComplete(ctx, apiClient.CoreJobServiceApi, respStop.GetId()); errRefresh != nil {145 return errRefresh146 }147 return nil148}149func restartService(ctx context.Context, id string, apiClient *cloudmgr.APIClient) error {150 if errStop := stopService(ctx, id, apiClient); errStop != nil {151 return errStop152 }153 if errStart := startService(ctx, id, apiClient); errStart != nil {154 return errStart155 }156 return nil157}158func canExpendShrinkService(ctx context.Context, id string, apiClient *cloudmgr.APIClient) error {159 resp, r, err := apiClient.CoreServiceApi.DescribeService(ctx, id).Execute()160 if err != nil {161 if errInner1, ok := err.(cloudmgr.GenericOpenAPIError); ok {162 if errInner2, ok := errInner1.Model().(cloudmgr.CommonActionResponse); ok {163 return fmt.Errorf("Error when calling `CoreServiceApi.DescribeService`: %s\n", *errInner2.ErrorMessage)164 }165 }166 return fmt.Errorf("Error when calling `CoreServiceApi.DescribeService` (Error not format): %v\n", err)167 }168 if r.StatusCode != 200 {169 return fmt.Errorf("Error when calling `CoreServiceApi.DescribeService` StatusCode != 200: %s\n", r.Status)170 }171 currStatus := strings.ToLower(*resp.Status)172 if currStatus == SERVICE_STARTED {173 return nil174 }175 return fmt.Errorf("Service status should be STARTED ")176}177func checkErrAndNetResponse(err error, r *_nethttp.Response, content string) error {178 if err != nil {179 if errInner1, ok := err.(cloudmgr.GenericOpenAPIError); ok {180 if errInner2, ok := errInner1.Model().(cloudmgr.CommonActionResponse); ok {181 return fmt.Errorf("Error when calling `%s`: %s\n", content, *errInner2.ErrorMessage)182 }183 }184 return fmt.Errorf("Error when calling `%s` (Error not format): %v\n", content, err)185 }186 if r.StatusCode != 200 {187 return fmt.Errorf("Wrong response with %s and code %d ", content, r.StatusCode)188 }189 return nil190}191func getVolumeResizeMap(ctx context.Context, componentInput string, id string, apiClient *cloudmgr.APIClient, d *schema.ResourceData, targetSize *map[string]interface{}) error {192 //volume193 component := []string{componentInput}194 respListInstance, rListInstance, errListInstance := apiClient.CoreServiceApi.ListServiceInstance(ctx, id).Component(component).Execute()195 if errListInstance = checkErrAndNetResponse(errListInstance, rListInstance, "CoreServiceApi.ListServiceInstance with component "+componentInput); errListInstance != nil {196 return fmt.Errorf(errListInstance.Error())197 }198 respListVolume, rListVolume, errListVolume := apiClient.CoreInstanceServiceApi.ListVolume(ctx, respListInstance.GetContent()[0].GetId()).Execute()199 if errListVolume = checkErrAndNetResponse(errListVolume, rListVolume, "CoreServiceApi.ListVolume with id "+respListInstance.GetContent()[0].GetId()); errListVolume != nil {200 return fmt.Errorf(errListVolume.Error())201 }202 componentPropertiesRaw := d.Get(componentInput).(*schema.Set).List()203 var componentProperties = componentPropertiesRaw[0].(map[string]interface{})204 currServiceSize := int(*(*(respListVolume.Content))[0].Size)205 currLocalSize := componentProperties["volume_size"].(int)206 if currLocalSize < currServiceSize {207 return fmt.Errorf("Not support volume size shrink. ")208 }209 if currLocalSize > currServiceSize {210 respDescribeVolumeType, rDescribeVolumeType, errDescribeVolumeType := apiClient.CoreVolumeTypeServiceApi.DescribeVolumeType(context.Background(), componentProperties["volume_type"].(string)).Execute()211 if errDescribeVolumeType = checkErrAndNetResponse(errDescribeVolumeType, rDescribeVolumeType, "Describe master volume type"); errDescribeVolumeType != nil {212 return fmt.Errorf(errDescribeVolumeType.Error())213 }214 maxSize := int(*respDescribeVolumeType.MaxSize)215 step := int(*respDescribeVolumeType.StepSize)216 if currLocalSize > maxSize {217 return fmt.Errorf(componentInput + " volume size should less than " + strconv.Itoa(maxSize))218 }219 if (currLocalSize-currServiceSize)%step != 0 {220 return fmt.Errorf(componentInput + " volume size should be step of " + strconv.Itoa(step))221 }222 (*targetSize)[componentInput] = currLocalSize223 }224 return nil225}226func resizeVolume(ctx context.Context, id string, apiClient *cloudmgr.APIClient, targetSize map[string]interface{}) error {227 if errStop := stopService(ctx, id, apiClient); errStop != nil {228 return errStop229 }230 respResize, rResize, errResize := apiClient.CoreServiceApi.ResizeVolumes(ctx, id).Body(cloudmgr.CoreResizeServiceVolumesRequest{231 TargetVolumeSize: &targetSize,232 }).Execute()233 if errResize = checkErrAndNetResponse(errResize, rResize, "CoreServiceApi.ResizeVolumes"); errResize != nil {234 return errResize235 }236 if errRefresh := waitJobComplete(ctx, apiClient.CoreJobServiceApi, respResize.GetId()); errRefresh != nil {237 return errRefresh238 }239 if errStart := startService(ctx, id, apiClient); errStart != nil {240 return errStart241 }242 return nil...

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Stop

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1import (2func main() {3 ticker := time.NewTicker(time.Millisecond * 500)4 go func() {5 for t := range ticker.C {6 fmt.Println("Tick at", t)7 }8 }()9 time.Sleep(time.Millisecond * 1600)10 ticker.Stop()11 fmt.Println("Ticker stopped")12}

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Stop

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1import (2func main() {3 ticker := time.NewTicker(1 * time.Second)4 go func() {5 for t := range ticker.C {6 fmt.Println("Tick at", t)7 }8 }()9 time.Sleep(5 * time.Second)10 ticker.Stop()11 fmt.Println("Ticker stopped")12}13import (14func main() {15 ticker := time.NewTicker(1 * time.Second)16 go func() {17 for t := range ticker.C {18 fmt.Println("Tick at", t)19 }20 }()21 time.Sleep(5 * time.Second)22 ticker.Stop()23 fmt.Println("Ticker stopped")24}

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Stop

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1import (2func main() {3 ticker := time.NewTicker(100 * time.Millisecond)4 go func() {5 for t := range ticker.C {6 println("Tick at", t)7 }8 }()9 time.Sleep(1000 * time.Millisecond)10 ticker.Stop()11 println("Ticker stopped")12}13Related Posts: GoLang | How to use time.After() method14GoLang | How to use time.AfterFunc() method15GoLang | How to use time.Now() method16GoLang | How to use time.Tick() method17GoLang | How to use time.Until() method

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Stop

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1import "fmt"2import "time"3func main() {4 ticker := time.NewTicker(500 * time.Millisecond)5 go func() {6 for t := range ticker.C {7 fmt.Println("Tick at", t)8 }9 }()10 time.Sleep(1600 * time.Millisecond)11 ticker.Stop()12 fmt.Println("Ticker stopped")13}14Related Articles: GoLang | time.Tick() function15GoLang | time.After() function16GoLang | time.AfterFunc() function17GoLang | time.Since() function18GoLang | time.Until() function19GoLang | time.Now() function20GoLang | time.Now().UnixNano() function21GoLang | time.Now().Unix() function22GoLang | time.Now().UTC() function23GoLang | time.Now().Date() function24GoLang | time.Now().Year() function25GoLang | time.Now().Month() function26GoLang | time.Now().Day() function27GoLang | time.Now().Hour() function28GoLang | time.Now().Minute() function29GoLang | time.Now().Second() function30GoLang | time.Now().Nanosecond() function31GoLang | time.Now().Weekday() function32GoLang | time.Now().Add() function33GoLang | time.Now().AddDate() function34GoLang | time.Now().AppendFormat() function35GoLang | time.Now().Clock() function36GoLang | time.Now().Date() function37GoLang | time.Now().Equal() function38GoLang | time.Now().Format() function39GoLang | time.Now().GobDecode() function40GoLang | time.Now().GobEncode() function41GoLang | time.Now().In() function42GoLang | time.Now().IsZero() function43GoLang | time.Now().Local() function44GoLang | time.Now().MarshalBinary() function45GoLang | time.Now().MarshalJSON() function46GoLang | time.Now().MarshalText() function47GoLang | time.Now().Round

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1import (2func main() {3 timer1 := time.NewTimer(time.Second * 2)4 fmt.Println("Timer 1 expired")5 timer2 := time.NewTimer(time.Second)6 go func() {7 fmt.Println("Timer 2 expired")8 }()9 stop2 := timer2.Stop()10 if stop2 {11 fmt.Println("Timer 2 stopped")12 }13}14import (15func main() {16 timer1 := time.NewTimer(time.Second * 2)17 fmt.Println("Timer 1 expired")18 timer2 := time.NewTimer(time.Second)19 go func() {20 fmt.Println("Timer 2 expired")21 }()22 stop2 := timer2.Stop()23 if stop2 {24 fmt.Println("Timer 2 stopped")25 }26 time.Sleep(time.Second * 2)27}28import (29func main() {30 ch1 := make(chan string, 1)31 go func() {32 time.Sleep(time.Second * 2)33 }()

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Stop

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1import (2func main() {3 stop := time.NewTimer(time.Second * 2)4 go func() {5 fmt.Println("Timer stopped")6 }()7 stop.Stop()8 fmt.Println("Timer stopped")9}10import (11func main() {12 stop := time.NewTimer(time.Second * 2)13 go func() {14 fmt.Println("Timer stopped")15 }()16 stop.Reset(time.Second * 3)17 fmt.Println("Timer reset")18}19import (20func main() {21 stop := time.NewTimer(time.Second * 2)22 go func() {23 fmt.Println("Timer stopped")24 }()25 stop.Reset(time.Second * 3)26 fmt.Println("Timer reset")27}

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1import (2func main() {3 fmt.Println("Start")4 time.Sleep(2 * time.Second)5 fmt.Println("Stop")6}7import (8func main() {9 fmt.Println("Start")10 timer := time.NewTimer(2 * time.Second)11 fmt.Println("Stop")12}13import (14func main() {15 fmt.Println("Start")16 ticker := time.NewTicker(2 * time.Second)17 go func() {18 for {19 select {20 fmt.Println("Stop")21 }22 }23 }()24 time.Sleep(5 * time.Second)25 ticker.Stop()26}27import (28func main() {29 fmt.Println("Start")30 timer := time.NewTimer(2 * time.Second)31 done := make(chan bool)32 go func() {33 fmt.Println("Stop")34 }()35 stop := timer.Stop()36 if stop {37 fmt.Println("Timer stopped")38 }39}40import (41func main() {42 fmt.Println("Start")43 ticker := time.NewTicker(2 * time.Second)44 done := make(chan bool)45 go func() {46 for {47 select {48 fmt.Println("Stop")49 }50 }51 }()52 time.Sleep(5 * time.Second)53 stop := ticker.Stop()

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1import (2func main() {3 c1 := time.After(10 * time.Second)4 c2 := time.After(5 * time.Second)5 fmt.Println("Waiting")6 fmt.Println("5 sec passed")7 fmt.Println("10 sec passed")8}9ch := make(chan type, buffer size)10import (11func main() {12 ch := make(chan string, 2)13 fmt.Println(<-ch)14 fmt.Println(<-ch)15}16ch := make(chan type)17import (18func main() {19 ch := make(chan string)20 go func() {21 }()22 time.Sleep(2 * time.Second)23 fmt.Println(<-ch)24}25import (26func main() {27 c1 := make(chan string)28 c2 := make(chan string)29 go func() {30 time.Sleep(2 * time.Second)31 }()32 go func() {33 time.Sleep(1 * time.Second)

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