private class TestThumbnailManager extends ThumbnailManager {
        @Override
        public void init() {
            // Do nothing to avoid container access
        }

        @Override
        protected void storeQueue(List<Tuple3<String, String, String>> taskList) {
            // Override to avoid database operations
            taskList.clear();
        }

        @Override

                        if (!taskList.isEmpty()) {
                            storeQueue(taskList);
                        }
                    } else if (!taskList.contains(task)) {
                        taskList.add(task);
                        if (taskList.size() > thumbnailTaskBulkSize) {
                            storeQueue(taskList);
                        }
                    }