使用IRepository的C#共享事务和NHibernate

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问题描述

我正在考虑使用NHibernate实现IRepository模式，但我有一个问题，就是我无法回答搜索网络的问题.

I'm looking into implementing the IRepository pattern using NHibernate and I have question that I've not been able to answer searching the net.

假设我有3个存储库，PersonRepository，PersonAddressRepository和PersonAccountRepository.现在，假设业务逻辑规定存在一个调用PersonRepository.Deactivate()，PersonAddressRepository.Deactivate()和PersonAccountRepository.Deactivate()的停用Person"过程.

Assume I have 3 Repositories, PersonRepository, PersonAddressRepository and PersonAccountRepository. Now assume that business logic dictates that there be an "Deactivate Person" process that calls PersonRepository.Deactivate(), PersonAddressRepository.Deactivate() and PersonAccountRepository.Deactivate().

我希望能够做一些类似的事情.

I want to be able to do something along the lines of..

using (ITransaction transaction = session.BeginTransaction()) { 
    session.Update(Person);
    session.Update(PersonAddress);
    session.Update(PersonAccount);
}

因此，如果这些更新中的任何一个失败，整个过程将在数据库中回滚.现在，我对NHibernate的理解是，您只能为每个对象创建一个Session.

So that if any of those updates fail that the entire process rolls back within the database. Now at the moment my understanding of NHibernate is you can only create a Session per object so..

var cfg = new Configuration();
cfg.Configure();
cfg.AddAssembly(typeof(Person).Assembly);
ISessionFactory sessionFactory = cfg.BuildSessionFactory();
using (ISession session = sessionFactory.OpenSession()) {
    using (ITransaction transaction = session.BeginTransaction()) {
    session.Save(Person);
}

这是正确的还是我弄错了?关于多表更新和关于NHibernate的事务的最佳做法是什么?

Is this correct or am I mistaken? What are the best practices for Transactions regarding multi table updates and Transactions with regards to NHibernate.

谢谢.

推荐答案

您不应在存储库或其他波纹管"中创建事务.事务由应用程序逻辑定义.这是我在事务处理中看到的最常见的错误之一.

You should not create transactions in the repositories or somewhere else "bellow". Transactions are defined by the application logic. This is one of the most common mistakes I see in transaction handling.

我写了一个管理交易的交易服务:

I wrote a transaction service which manages the transactions:

using (TransactionService.CreateTransactionScope())
{
  repositoryA.DoX();
  repositoryB.DoY();
  TransactionService.Commit();
}

存储库正在通过服务从公开交易中获取会话:

The repository is getting the session with an open transaction from the service:

TransactionService.Session.CreateQuery("...");

根据您的环境，您需要使其更加复杂.例如，会话可能对业务逻辑不可见，应将其置于其他接口等上.

Depending on your environment, you need to make it a bit more complicated. For instance, the session may not be visible to the business logic and should to be put onto another interface etc.

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