Fix panic (#49)

Signed-off-by: Tamal Saha <tamal@appscode.com>

Author: tamalsaha

lib/nats.go

@@ -116,15 +116,21 @@ func isNatsAuthError(e string) bool {
 	return false
 }
 
-func (c *NatsClient) GetLicenseID() string {
+func (c *NatsClient) GetLicenseID() (string, error) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
 
+	if c.l == nil {
+		if err := c.connect(); err != nil {
+			return "", err
+		}
+	}
+
 	if c.l.Status == v1alpha1.LicenseActive && time.Now().After(c.l.NotAfter.Time) {
 		license, _ := c.le.LoadLicense()
 		c.l = &license
 	}
-	return c.l.ID
+	return c.l.ID, nil
 }
 
 func (c *NatsClient) connect() error {

lib/publisher.go

@@ -146,8 +146,8 @@ func (p *EventPublisher) ForGVK(informer Informer, gvk schema.GroupVersionKind)
 			if err != nil {
 				return nil, err
 			}
-			ev.LicenseID = p.c.GetLicenseID()
-			return ev, nil
+			ev.LicenseID, err = p.c.GetLicenseID()
+			return ev, err
 		},
 	}
 	_, _ = informer.AddEventHandlerWithResyncPeriod(h, eventInterval)
@@ -212,7 +212,10 @@ func (p *EventPublisher) setupSiteInfoPublisher(cfg *rest.Config, kc kubernetes.
 		identitylib.RefreshNodeStats(p.si, nodes)
 		p.siMutex.Unlock()
 
-		licenseID := p.c.GetLicenseID()
+		licenseID, err := p.c.GetLicenseID()
+		if err != nil {
+			return nil, err
+		}
 		p.si.Product.LicenseID = licenseID
 		p.si.Name = fmt.Sprintf("%s.%s", licenseID, p.si.Product.ProductName)
 		ev := &api.Event{