feat: Introduce skipping of automatic event responses per task handler (

#537) * feat: Introduce skipping of automatic event responses per task handler Signed-off-by: warber <bernd.warmuth@dynatrace.com> * cleanup Signed-off-by: warber <bernd.warmuth@dynatrace.com> Signed-off-by: warber <bernd.warmuth@dynatrace.com>
keptn · Sep 7, 2022 · 278ad8b · 278ad8b
1 parent f07eb2f
commit 278ad8b
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Showing 4 changed files with 96 additions and 6 deletions.
diff --git a/pkg/sdk/keptn.go b/pkg/sdk/keptn.go
@@ -116,21 +116,41 @@ func (w *nopWG) Wait() {
 	// --
 }
 
-// WithTaskHandler registers a handler which is responsible for processing a .triggered event
+// WithTaskHandler registers a handler which is responsible for processing a .triggered event.
+// Note, that if you want to have more control on configuring the behavior of the task handler,
+// you can use WithTaskEventHandler instead
 func WithTaskHandler(eventType string, handler TaskHandler, filters ...func(keptnHandle IKeptn, event KeptnEvent) bool) KeptnOption {
+	return WithTaskEventHandler(eventType, handler, TaskHandlerOptions{
+		Filters:               filters,
+		SkipAutomaticResponse: false,
+	})
+}
+
+// WithTaskEventHandler registers a handler which is responsible for processing a received .triggered event
+func WithTaskEventHandler(eventType string, handler TaskHandler, options TaskHandlerOptions) KeptnOption {
 	return func(k *Keptn) {
-		k.taskRegistry.Add(eventType, taskEntry{taskHandler: handler, eventFilters: filters})
+		k.taskRegistry.Add(eventType, taskEntry{taskHandler: handler, eventFilters: options.Filters, taskHandlerOpts: options})
 	}
 }
 
 // WithAutomaticResponse sets the option to instruct the sdk to automatically send a .started and .finished event.
-// Per default this behavior is turned on and can be disabled with this function
+// Per default this behavior is turned on and can be disabled with this function. Note, that this affects ALL
+// task handlers. If you want to disable automatic event responses for a specific task handler, this can be done
+// with the respective TaskHandlerOptions passed to WithTaskEventHandler
 func WithAutomaticResponse(autoResponse bool) KeptnOption {
 	return func(k *Keptn) {
 		k.automaticEventResponse = autoResponse
 	}
 }
 
+// TaskHandlerOptions are specific options for a task handler
+type TaskHandlerOptions struct {
+	// Filters specifies functions that determine whether the event shall be handled or ignored
+	Filters []func(IKeptn, KeptnEvent) bool
+	// SkipAutomaticResponse determines whether automatic sending of .started/.finished events should be skipped
+	SkipAutomaticResponse bool
+}
+
 // WithGracefulShutdown sets the option to ensure running tasks/handlers will finish in case of interrupt or forced termination
 // Per default this behavior is turned on and can be disabled with this function
 func WithGracefulShutdown(gracefulShutdown bool) KeptnOption {
@@ -251,8 +271,11 @@ func (k *Keptn) OnEvent(ctx context.Context, event models.KeptnContextExtendedCE
 					}
 				}
 
+				// automatic response of events is enabled if it is turned on globally, and not disabled for the specific handler
+				autoResponse := k.automaticEventResponse && !k.taskRegistry.Get(*event.Type).taskHandlerOpts.SkipAutomaticResponse
+
 				// only respond with .started event if the incoming event is a task.triggered event
-				if keptnv2.IsTaskEventType(*event.Type) && keptnv2.IsTriggeredEventType(*event.Type) && k.automaticEventResponse {
+				if keptnv2.IsTaskEventType(*event.Type) && keptnv2.IsTriggeredEventType(*event.Type) && autoResponse {
 					startedEvent, err := createStartedEvent(k.source, event)
 					if err != nil {
 						k.logger.Errorf("Unable to create '.started' event from '.triggered' event: %v", err)
@@ -267,7 +290,7 @@ func (k *Keptn) OnEvent(ctx context.Context, event models.KeptnContextExtendedCE
 				result, err := handler.taskHandler.Execute(k, *keptnEvent)
 				if err != nil {
 					k.logger.Errorf("Error during task execution %v", err.Err)
-					if k.automaticEventResponse {
+					if autoResponse {
 						errorEvent, err := createErrorEvent(k.source, event, result, err)
 						if err != nil {
 							k.logger.Errorf("Unable to create '.error' event: %v", err)
@@ -282,7 +305,7 @@ func (k *Keptn) OnEvent(ctx context.Context, event models.KeptnContextExtendedCE
 				}
 				if result == nil {
 					k.logger.Infof("no finished data set by task executor for event %s. Skipping sending finished event", *event.Type)
-				} else if keptnv2.IsTaskEventType(*event.Type) && keptnv2.IsTriggeredEventType(*event.Type) && k.automaticEventResponse {
+				} else if keptnv2.IsTaskEventType(*event.Type) && keptnv2.IsTriggeredEventType(*event.Type) && autoResponse {
 					finishedEvent, err := createFinishedEvent(k.source, event, result)
 					if err != nil {
 						k.logger.Errorf("Unable to create '.finished' event: %v", err)

diff --git a/pkg/sdk/keptn_fake.go b/pkg/sdk/keptn_fake.go
@@ -82,6 +82,12 @@ func (f *FakeKeptn) SetAPI(api api.KeptnInterface) {
 	f.Keptn.api = api
 }
 
+func (f *FakeKeptn) AddTaskEventHandler(eventType string, handler TaskHandler, options TaskHandlerOptions) {
+	f.Keptn.taskRegistry.Add(eventType, taskEntry{taskHandler: handler, eventFilters: options.Filters, taskHandlerOpts: options})
+}
+
+// AddTaskEventHandler registers a TaskHandler
+// Deprecated: use AddTaskEventHandler
 func (f *FakeKeptn) AddTaskHandler(eventType string, handler TaskHandler, filters ...func(keptnHandle IKeptn, event KeptnEvent) bool) {
 	f.AddTaskHandlerWithSubscriptionID(eventType, handler, "", filters...)
 }

diff --git a/pkg/sdk/keptn_test.go b/pkg/sdk/keptn_test.go
@@ -149,6 +149,65 @@ func Test_WhenReceivingAnEvent_StartedEventAndFinishedEventsAreSent(t *testing.T
 	fakeKeptn.AssertSentEventType(t, 1, "sh.keptn.event.faketask.finished")
 }
 
+func Test_WhenReceivingAnEvent_AndAutomaticEventResponseIsGloballyDiabled_StartedEventAndFinishedEventsAreNotSent(t *testing.T) {
+	taskHandler := &TaskHandlerMock{}
+	taskHandler.ExecuteFunc = func(keptnHandle IKeptn, event KeptnEvent) (interface{}, *Error) { return FakeTaskData{}, nil }
+	fakeKeptn := NewFakeKeptn("fake")
+	fakeKeptn.Keptn.automaticEventResponse = false
+	fakeKeptn.AddTaskEventHandler("sh.keptn.event.faketask.triggered", taskHandler, TaskHandlerOptions{})
+	fakeKeptn.AddTaskEventHandler("sh.keptn.event.faketask2.triggered", taskHandler, TaskHandlerOptions{})
+	fakeKeptn.NewEvent(models.KeptnContextExtendedCE{
+		Data:           v0_2_0.EventData{Project: "prj", Stage: "stg", Service: "svc"},
+		ID:             "id",
+		Shkeptncontext: "context",
+		Source:         strutils.Stringp("source"),
+		Type:           strutils.Stringp("sh.keptn.event.faketask.triggered"),
+	})
+
+	fakeKeptn.NewEvent(models.KeptnContextExtendedCE{
+		Data:           v0_2_0.EventData{Project: "prj", Stage: "stg", Service: "svc"},
+		ID:             "id",
+		Shkeptncontext: "context",
+		Source:         strutils.Stringp("source"),
+		Type:           strutils.Stringp("sh.keptn.event.faketask2.triggered"),
+	})
+
+	fakeKeptn.AssertNumberOfEventSent(t, 0)
+}
+
+func Test_WhenReceivingAnEvent_AndAutomaticEventResponseIsDisabledOnTaskHandler_StartedEventAndFinishedEventsAreNotSent(t *testing.T) {
+	taskHandler := &TaskHandlerMock{}
+	taskHandler.ExecuteFunc = func(keptnHandle IKeptn, event KeptnEvent) (interface{}, *Error) { return FakeTaskData{}, nil }
+	fakeKeptn := NewFakeKeptn("fake")
+	fakeKeptn.AddTaskEventHandler("sh.keptn.event.faketask.triggered", taskHandler, TaskHandlerOptions{
+		Filters:               nil,
+		SkipAutomaticResponse: true,
+	})
+	fakeKeptn.AddTaskEventHandler("sh.keptn.event.faketask2.triggered", taskHandler, TaskHandlerOptions{
+		Filters:               nil,
+		SkipAutomaticResponse: false,
+	})
+	fakeKeptn.NewEvent(models.KeptnContextExtendedCE{
+		Data:           v0_2_0.EventData{Project: "prj", Stage: "stg", Service: "svc"},
+		ID:             "id",
+		Shkeptncontext: "context",
+		Source:         strutils.Stringp("source"),
+		Type:           strutils.Stringp("sh.keptn.event.faketask.triggered"),
+	})
+
+	fakeKeptn.NewEvent(models.KeptnContextExtendedCE{
+		Data:           v0_2_0.EventData{Project: "prj", Stage: "stg", Service: "svc"},
+		ID:             "id",
+		Shkeptncontext: "context",
+		Source:         strutils.Stringp("source"),
+		Type:           strutils.Stringp("sh.keptn.event.faketask2.triggered"),
+	})
+
+	fakeKeptn.AssertNumberOfEventSent(t, 2)
+	fakeKeptn.AssertSentEventType(t, 0, "sh.keptn.event.faketask2.started")
+	fakeKeptn.AssertSentEventType(t, 1, "sh.keptn.event.faketask2.finished")
+}
+
 func Test_WhenReceivingAnEvent_TaskHandlerFails(t *testing.T) {
 	taskHandler := &TaskHandlerMock{}
 	taskHandler.ExecuteFunc = func(keptnHandle IKeptn, event KeptnEvent) (interface{}, *Error) {

diff --git a/pkg/sdk/taskregistry.go b/pkg/sdk/taskregistry.go
@@ -13,6 +13,8 @@ type taskEntry struct {
 	taskHandler TaskHandler
 	// eventFilters is a list of functions that are executed before a task is handled by the taskHandler. Only if all functions return 'true', the task will be handled
 	eventFilters []func(keptnHandle IKeptn, event KeptnEvent) bool
+	// taskHandlerOpts are the options for the handler
+	taskHandlerOpts TaskHandlerOptions
 }
 
 func newTaskMap() *taskRegistry {