create cluster field to store stream application ids

pkg/cluster/cluster.go

@@ -91,6 +91,7 @@ type Cluster struct {
 	currentProcess      Process
 	processMu           sync.RWMutex // protects the current operation for reporting, no need to hold the master mutex
 	specMu              sync.RWMutex // protects the spec for reporting, no need to hold the master mutex
+	streamApplications  []string
 	ConnectionPooler    map[PostgresRole]*ConnectionPoolerObjects
 	EBSVolumes          map[string]volumes.VolumeProperties
 	VolumeResizer       volumes.VolumeResizer

pkg/cluster/streams.go

@@ -46,8 +46,7 @@ func (c *Cluster) deleteStreams() error {
 	}
 
 	errors := make([]string, 0)
-	appIds := gatherApplicationIds(c.Spec.Streams)
-	for _, appId := range appIds {
+	for _, appId := range c.streamApplications {
 		fesName := fmt.Sprintf("%s-%s", c.Name, appId)
 		err = c.KubeClient.FabricEventStreams(c.Namespace).Delete(context.TODO(), fesName, metav1.DeleteOptions{})
 		if err != nil {
@@ -274,6 +273,11 @@ func (c *Cluster) syncStreams() error {
 		return nil
 	}
 
+	// fetch different application IDs from streams section
+	// there will be a separate event stream resource for each ID
+	appIds := gatherApplicationIds(c.Spec.Streams)
+	c.streamApplications = appIds
+
 	slots := make(map[string]map[string]string)
 	publications := make(map[string]map[string]acidv1.StreamTable)
 
@@ -338,9 +342,7 @@ func (c *Cluster) syncStreams() error {
 }
 
 func (c *Cluster) createOrUpdateStreams() error {
-
-	appIds := gatherApplicationIds(c.Spec.Streams)
-	for _, appId := range appIds {
+	for _, appId := range c.streamApplications {
 		fesName := fmt.Sprintf("%s-%s", c.Name, appId)
 		effectiveStreams, err := c.KubeClient.FabricEventStreams(c.Namespace).Get(context.TODO(), fesName, metav1.GetOptions{})
 		if err != nil {