@Override
 public long addContent(long taskId, Map<String, Object> params) {
   synchronized (ksession) {
     return taskService.addContent(taskId, params);
   }
 }
 @Override
 public long addContent(long taskId, Content content) {
   synchronized (ksession) {
     return taskService.addContent(taskId, content);
   }
 }