refactor util functions for event recording

Kubernetes-commit: 7296288928d347dfb1dcb990d779cdfce96ead1b

tools/record/event.go

@@ -21,7 +21,7 @@ import (
 	"math/rand"
 	"time"
 
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
@@ -29,10 +29,8 @@ import (
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
 	"k8s.io/apimachinery/pkg/watch"
 	restclient "k8s.io/client-go/rest"
+	"k8s.io/client-go/tools/record/util"
 	ref "k8s.io/client-go/tools/reference"
-
-	"net/http"
-
 	"k8s.io/klog"
 )
 
@@ -157,16 +155,6 @@ func recordToSink(sink EventSink, event *v1.Event, eventCorrelator *EventCorrela
 	}
 }
 
-func isKeyNotFoundError(err error) bool {
-	statusErr, _ := err.(*errors.StatusError)
-
-	if statusErr != nil && statusErr.Status().Code == http.StatusNotFound {
-		return true
-	}
-
-	return false
-}
-
 // recordEvent attempts to write event to a sink. It returns true if the event
 // was successfully recorded or discarded, false if it should be retried.
 // If updateExistingEvent is false, it creates a new event, otherwise it updates
@@ -178,7 +166,7 @@ func recordEvent(sink EventSink, event *v1.Event, patch []byte, updateExistingEv
 		newEvent, err = sink.Patch(event, patch)
 	}
 	// Update can fail because the event may have been removed and it no longer exists.
-	if !updateExistingEvent || (updateExistingEvent && isKeyNotFoundError(err)) {
+	if !updateExistingEvent || (updateExistingEvent && util.IsKeyNotFoundError(err)) {
 		// Making sure that ResourceVersion is empty on creation
 		event.ResourceVersion = ""
 		newEvent, err = sink.Create(event)
@@ -260,7 +248,7 @@ func (recorder *recorderImpl) generateEvent(object runtime.Object, annotations m
 		return
 	}
 
-	if !validateEventType(eventtype) {
+	if !util.ValidateEventType(eventtype) {
 		klog.Errorf("Unsupported event type: '%v'", eventtype)
 		return
 	}
@@ -275,14 +263,6 @@ func (recorder *recorderImpl) generateEvent(object runtime.Object, annotations m
 	}()
 }
 
-func validateEventType(eventtype string) bool {
-	switch eventtype {
-	case v1.EventTypeNormal, v1.EventTypeWarning:
-		return true
-	}
-	return false
-}
-
 func (recorder *recorderImpl) Event(object runtime.Object, eventtype, reason, message string) {
 	recorder.generateEvent(object, nil, metav1.Now(), eventtype, reason, message)
 }

tools/record/util/util.go

@@ -0,0 +1,44 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package util
+
+import (
+	"net/http"
+
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/errors"
+)
+
+// ValidateEventType checks that eventtype is an expected type of event
+func ValidateEventType(eventtype string) bool {
+	switch eventtype {
+	case v1.EventTypeNormal, v1.EventTypeWarning:
+		return true
+	}
+	return false
+}
+
+// IsKeyNotFoundError is utility function that checks if an error is not found error
+func IsKeyNotFoundError(err error) bool {
+	statusErr, _ := err.(*errors.StatusError)
+
+	if statusErr != nil && statusErr.Status().Code == http.StatusNotFound {
+		return true
+	}
+
+	return false
+}