perf: remove go-nanoid and rxgo

internal/crd/finalizer.go

@@ -5,7 +5,6 @@ import (
 	"flink-kube-operator/internal/crd/v1alpha1"
 	"flink-kube-operator/pkg"
 
-	"github.com/reactivex/rxgo/v2"
 	"go.uber.org/zap"
 	"k8s.io/apimachinery/pkg/types"
 	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
@@ -13,11 +12,10 @@ import (
 
 var FinalizerChannel chan (types.UID) = make(chan (types.UID))
 
-func (crd Crd) manageFinalizer(jobEventObservable rxgo.Observable) {
+func (crd Crd) manageFinalizer(jobEventChannel chan FlinkJobCrdEvent) {
 
 	finalizerName := "flink-operator.logicamp.tech/finalizer"
-	for j := range jobEventObservable.Observe() {
-		jobEvent := j.V.(*FlinkJobCrdEvent)
+	for jobEvent := range jobEventChannel {
 		pkg.Logger.Debug("[crd] [manage-finalizer] main loop", zap.String("name", jobEvent.Job.Name))
 		go func() {
 			if jobEvent.Job.GetDeletionTimestamp() != nil {

internal/crd/new.go

@@ -4,7 +4,6 @@ import (
 	"flink-kube-operator/internal/crd/v1alpha1"
 	"os"
 
-	"github.com/reactivex/rxgo/v2"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/client-go/dynamic"
 	"k8s.io/client-go/rest"
@@ -49,10 +48,10 @@ func New() *Crd {
 		runtimeClient: runtimeClient,
 	}
 
-	jobEventCh := make(chan rxgo.Item)
+	jobEventCh := make(chan FlinkJobCrdEvent)
 
 	// add finalizer to new resources
-	go crd.manageFinalizer(rxgo.FromChannel(jobEventCh))
+	go crd.manageFinalizer(jobEventCh)
 
 	// Watch for FlinkJob creation
 	crd.watchFlinkJobs(jobEventCh)

internal/crd/watch.go

@@ -7,7 +7,6 @@ import (
 
 	"flink-kube-operator/pkg"
 
-	"github.com/reactivex/rxgo/v2"
 	"go.uber.org/zap"
 	metaV1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
@@ -15,7 +14,7 @@ import (
 	"k8s.io/apimachinery/pkg/watch"
 )
 
-func (crd Crd) watchFlinkJobs(ch chan rxgo.Item) rxgo.Observable {
+func (crd Crd) watchFlinkJobs(ch chan FlinkJobCrdEvent) {
 
 	go func() {
 		pkg.Logger.Debug("[crd] starting watch")
@@ -45,14 +44,12 @@ func (crd Crd) watchFlinkJobs(ch chan rxgo.Item) rxgo.Observable {
 			}
 
 			go func() {
-				ch <- rxgo.Item{
-					V: &FlinkJobCrdEvent{
-						EventType: event.Type,
-						Job:       job,
-					},
+				ch <- FlinkJobCrdEvent{
+					EventType: event.Type,
+					Job:       job,
 				}
 			}()
-			pkg.Logger.Debug("[crd] [watch] change in", zap.String("name", job.Name))
+			pkg.Logger.Debug("[crd] [watch] change in", zap.String("name", job.Name), zap.String("operation", string(event.Type)))
 			switch event.Type {
 			case watch.Bookmark:
 			case watch.Modified:
@@ -68,5 +65,4 @@ func (crd Crd) watchFlinkJobs(ch chan rxgo.Item) rxgo.Observable {
 
 	}()
 
-	return rxgo.FromChannel(ch)
 }

internal/jar/jar.go

@@ -1,6 +1,8 @@
 package jar
 
 import (
+	"crypto/rand"
+	"encoding/hex"
 	"errors"
 	"io"
 	"net/http"
@@ -10,7 +12,6 @@ import (
 	"flink-kube-operator/pkg"
 
 	api "github.com/logi-camp/go-flink-client"
-	gonanoid "github.com/matoous/go-nanoid/v2"
 	"go.uber.org/zap"
 )
 
@@ -46,7 +47,9 @@ func (jarFile *JarFile) Upload(flinkClient *api.Client) (fileName string, err er
 }
 
 func (jarFile *JarFile) Download() error {
-	fileName, _ := gonanoid.New()
+	randBytes := make([]byte, 16)
+	rand.Read(randBytes)
+	fileName := hex.EncodeToString(randBytes)
 	jarFile.filePath = "/tmp/" + fileName + ".jar"
 	out, err := os.Create(jarFile.filePath)
 	if err != nil {

internal/managed_job/manager.go

@@ -96,8 +96,6 @@ func (mgr *Manager) cycle(client *api.Client, crdInstance *crd.Crd) {
 
 		}
 
-		pkg.Logger.Debug("[manager] [cycle] finding job", zap.Any("name", managedJob.def.Name))
-
 		jobManagerJobOverview, jobFound := lo.Find(jobManagerJobOverviews.Jobs, func(job api.JobOverview) bool {
 			jobId := managedJob.GetJobId()
 			if jobId != nil {