休眠活跃交易 [英] Hibernate active transaction

问题描述

在我的服务班上，我想做些类似的事情:

In my service class I would like to have something like:

class ClientService {

  // Authorize
  // Returns true: Authorization successful
  // Returns false: Authorization failed
  public boolean authorize(String id, String password) {

  //Here I would like to check if an active transaction exists. 
  //If it exists, use that one, else create a new session and start 
  //a new transaction.
  //For example:
  Session session = HibernateUtil.getSessionFactory().getCurrentSession();
  if(!session.SOMEMETHOD_CHECK_IF_TRANSACTION_IS_ACTIVE) {
    session.beginTransaction();
  }

  Client client = clientDAO.get(id);

  if (client != null) {
    if (client.getPassword().equals(password)) {
      logger.debug("Authorization successful. ID: " + client.getId() + ", password: " + client.getPassword());
      return true;
    } else {
      logger.error("Authorization unsuccessful");
      return false;    
    } else {
      logger.debug("Authorization unsuccessful. No client exists with ID: " + id);
      return false;
    }
  }
}

在方法标题之后注意注释的文本.我对Hibernate不太熟悉，但是如果服务方法检查事务是否存在，使用它，否则创建一个新事务并关闭它，那会很好.

Notice the commented text after the method head. I'm not so familiar with Hibernate, but I think it would be great if the service methods check if transaction exists, use it, otherwise create a new one and close it.

如果有可能，我是否应该考虑任何性能原因(或其他原因)?还是执行这种事情的其他方法?

If it is possible, is there any performance reasons (or others) that I should have in mind? Or is it any other way to perform this kind of thing?

最诚挚的问候

推荐答案

lweller的答案比我的答案更合适，但是您可以通过调用 session.getTransaction().isActive()

lweller's answer is a more appropriate approach than my answer, but you can check the state of a transaction by calling session.getTransaction().isActive()

有关休眠事务，请参见Javadoc.

See the javadoc for Hibernate Transaction.

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