fix: prevent concurrent jobs map writes by adding synchronization

This fix prevents undefined behavior and runtime crashes in multithreaded
use cases.

internal/crd/repo.go

@@ -2,25 +2,28 @@ package crd
 
 import (
 	"flink-kube-operator/internal/crd/v1alpha1"
-	"maps"
+	"flink-kube-operator/pkg"
 
 	"k8s.io/apimachinery/pkg/types"
 )
 
-var jobs = map[types.UID]*v1alpha1.FlinkJob{}
+// var jobs = map[types.UID]*v1alpha1.FlinkJob{}
+var jobs = pkg.SafeMap[types.UID, *v1alpha1.FlinkJob]{}
 
 func (crd *Crd) repsert(job *v1alpha1.FlinkJob) {
-	jobs[job.GetUID()] = job
+	jobs.Store(job.GetUID(), job)
 }
 
 func GetJob(uid types.UID) v1alpha1.FlinkJob {
-	return *jobs[uid].DeepCopy()
+	job, _ := jobs.Load(uid)
+	return *job.DeepCopy()
 }
 
 func GetAllJobKeys() []types.UID {
 	keys := []types.UID{}
-	for k := range maps.Keys(jobs) {
+	jobs.Range(func(k types.UID, value *v1alpha1.FlinkJob) bool {
 		keys = append(keys, k)
-	}
+		return true
+	})
 	return keys
 }