Fix connect() to work with external component

stream_manager.go

@@ -113,22 +113,27 @@ func (sm *StreamManager) Stop() {
 }
 
 func (sm *StreamManager) connect() error {
-	if sm.client != nil {
-		if c, ok := sm.client.(*Client); ok {
-			if c.CurrentState.getState() == StateDisconnected {
-				sm.Metrics = initMetrics()
-				err := c.Connect()
-				if err != nil {
-					return err
-				}
-				if sm.PostConnect != nil {
-					sm.PostConnect(sm.client)
-				}
-				return nil
-			}
+	if sm.client == nil {
+		return errors.New("client is not set")
+	}
+
+	if c, ok := sm.client.(*Client); ok {
+		if c.CurrentState.getState() != StateDisconnected {
+			return errors.New("client is not disconnected")
 		}
 	}
-	return errors.New("client is not disconnected")
+
+	sm.Metrics = initMetrics()
+
+	if err := sm.client.Connect(); err != nil {
+		return err
+	}
+
+	if sm.PostConnect != nil {
+		sm.PostConnect(sm.client)
+	}
+
+	return nil
 }
 
 // resume manages the reconnection loop and apply the define backoff to avoid overloading the server.