apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/controller/AppController.java/AppController/deleteApp
class AppController:  @PreAuthorize(value = "@permissionValidator.isSuperAdmin()")
  @DeleteMapping("/{appId:.+}")
  public void deleteApp(@PathVariable String appId) {
    App app = appService.deleteAppInLocal(appId);

    publisher.publishEvent(new AppDeletionEvent(app));
  }