fix: avoid listener worker leak

pkg/mcclient/catalog.go

@@ -30,7 +30,7 @@ type IServiceCatalogChangeListener interface {
 func (cli *Client) RegisterCatalogListener(l IServiceCatalogChangeListener) {
 	cli.catalogListeners = append(cli.catalogListeners, l)
 	if cli.GetServiceCatalog() != nil {
-		cli.listenerWorker.Run(func() {
+		listenerWorker.Run(func() {
 			l.OnServiceCatalogChange(cli.GetServiceCatalog())
 		}, nil, nil)
 	}
@@ -38,7 +38,7 @@ func (cli *Client) RegisterCatalogListener(l IServiceCatalogChangeListener) {
 
 func (cli *Client) SetServiceCatalog(catalog IServiceCatalog) {
 	cli._serviceCatalog = catalog
-	cli.listenerWorker.Run(func() {
+	listenerWorker.Run(func() {
 		for i := range cli.catalogListeners {
 			cli.catalogListeners[i].OnServiceCatalogChange(catalog)
 		}

pkg/mcclient/mcclient.go

@@ -37,6 +37,8 @@ import (
 	"yunion.io/x/onecloud/pkg/util/seclib2"
 )
 
+var listenerWorker *appsrv.SWorkerManager
+
 type Client struct {
 	authUrl string
 	timeout int
@@ -46,7 +48,10 @@ type Client struct {
 	_serviceCatalog IServiceCatalog
 
 	catalogListeners []IServiceCatalogChangeListener
-	listenerWorker   *appsrv.SWorkerManager
+}
+
+func init() {
+	listenerWorker = appsrv.NewWorkerManager("client_catalog_listener_worker", 1, 2048, false)
 }
 
 func NewClient(authUrl string, timeout int, debug bool, insecure bool, certFile, keyFile string) *Client {
@@ -82,7 +87,6 @@ func NewClient(authUrl string, timeout int, debug bool, insecure bool, certFile,
 		},
 	}
 
-	client.listenerWorker = appsrv.NewWorkerManager("client_catalog_listener_worker", 1, 2048, false)
 	return &client
 }