我正在使用
目前我正在使用nhibernate，ninject与存储库模式和服务层。
所以我有这个
public class NhibernateSessionFactory
{
public ISessionFactory GetSessionFactory()
{
ISessionFactory fluentConfiguration = Fluently.Configure()
.Database(MsSqlConfiguration.MsSql2008.ConnectionString(c => c.FromConnectionStringWithKey("ConnectionString")))
.Mappings(m => m.FluentMappings.AddFromAssemblyOf<Framework.Data.Mapping.TableAMap>().Conventions.Add(ForeignKey.EndsWith("Id")))
.ExposeConfiguration(cfg => cfg.SetProperty("adonet.batch_size", "20"))
.ExposeConfiguration(c => c.SetProperty("generate_statistics", "true"))
//.ExposeConfiguration(BuidSchema)
.BuildSessionFactory();
return fluentConfiguration;
}
private static void BuidSchema(NHibernate.Cfg.Configuration config)
{
new NHibernate.Tool.hbm2ddl.SchemaExport(config).Create(false, true);
}
public class NhibernateSessionFactoryProvider : Provider<ISessionFactory>
{
protected override ISessionFactory CreateInstance(IContext context)
{
var sessionFactory = new NhibernateSessionFactory();
return sessionFactory.GetSessionFactory();
}
}
public class NhibernateModule : NinjectModule
{
public override void Load()
{
Bind<ISessionFactory>().ToProvider<NhibernateSessionFactoryProvider>().InSingletonScope();
Bind<ISession>().ToMethod(context => context.Kernel.Get<ISessionFactory>().OpenSession()).InRequestScope()
.OnActivation(StartTransaction)
.OnDeactivation(CommitTransaction);
}
public void CommitTransaction(ISession session)
{
if (session.Transaction.IsActive)
{
session.Transaction.Commit();
}
}
public void StartTransaction(ISession session)
{
if (!session.Transaction.IsActive)
{
session.BeginTransaction();
}
}
}
所以我在应用程序的生命周期内创建了一次nhibernate会话工厂，然后在需要时使用它给我会话。
一个交易开始我开始交易，最后我关闭交易。
我这样做的原因是因为当我使用nhibernate探查器时，我会收到很多关于使用 implicit transactions的警告。这种问题是对这个问题设置一个绑定但是从未真正修复它（它减少了数字，但任何懒惰加载仍然有这个问题）。
public class CalendarRepo : ICalendarRepo
{
private readonly ISession session;
public CalendarRepo(ISession session)
{
this.session = session;
}
public List<CalendarAppointment> RepeatingAppointments(int repeatingId)
{
List<CalendarAppointment> calendarAppointments = session.Query<CalendarAppointment>().Where(x => x.RepeatingId == repeatingId && x.RepeatingId != 0)
.Take(QueryLimits.Appointments)
.ToList();
return calendarAppointments;
}
}
public class CalendarService : ICalendarService
{
private readonly ICalendarRepo calendarRepo;
public CalendarService(ICalendarRepo calendarRepo)
{
this.calendarRepo = calendarRepo;
}
// normally would return something and take in params
public void SampleServiceMethod()
{
// do some checks if needed
// call up the repository
// call commit
// done.
}
}
所以这基本上就是我所拥有的。
我想使用工作单元模式，因此我可以通过事务（as right now I been told that I am doing them not quite right）获得更多事情并做好事情（{{3}}）
所以我正在寻找一个简单的例子，说明如何让他们一起工作，并找出我到目前为止需要改变多少。
我看到的大多数教程比我想要的更复杂。大多数做TDD并制作通用存储库有什么好处但是在我进入那个阶段之前，我希望看到一个教程即使重复代码就能做到这一点。
修改
所以我一直在玩它并想出了这个非常简单的例子。我不确定我是否做得对。
Ninject
/// <summary>
/// Load your modules or register your services here!
/// </summary>
/// <param name="kernel">The kernel.</param>
private static void RegisterServices(IKernel kernel)
{
kernel.Bind<ISessionFactory>().ToProvider<NhibernateSessionFactoryProvider>().InSingletonScope();
kernel.Bind<ISession>().ToMethod(context => context.Kernel.Get<ISessionFactory>().OpenSession()).InRequestScope();
kernel.Bind<ITable1Repo>().To<Table1Repo>();
kernel.Bind<ITable1Service>().To<Table1Service>();
kernel.Bind<IUnitofWork>().To<UnitofWork>();
}
nhibernate工厂类显示在原始帖子中。
// Controller
public class Default1Controller : Controller
{
private readonly ITable1Service table1Service;
//
// GET: /Default1/
public Default1Controller(ITable1Service table1Service)
{
this.table1Service = table1Service;
}
public ActionResult Index()
{
table1Service.Save();
return View();
}
}
//域
public class Table1
{
public virtual int Id { get; private set; }
public virtual string C1 { get; set; }
public virtual string C2 { get; set; }
}
// Fluent Mapping
public class Table1Mapping : ClassMap<Table1>
{
public Table1Mapping()
{
Id(x => x.Id);
Map(x => x.C1);
Map(x => x.C2);
}
}
//回购
public class Table1Repo : unitofwork.Models.Repository.ITable1Repo
{
private readonly ISession session;
public Table1Repo(ISession session)
{
this.session = session;
}
public void Create(Table1 tbl1)
{
session.Save(tbl1);
}
}
//服务层
public class Table1Service : unitofwork.Models.Service.ITable1Service
{
private readonly ITable1Repo table1Repo;
private readonly IUnitofWork unitOfWork;
public Table1Service(ITable1Repo table1Repo, IUnitofWork unitOfWork)
{
this.table1Repo = table1Repo;
this.unitOfWork = unitOfWork;
}
public void Save()
{
Table1 a = new Table1();
a.C1 = "test";
a.C2 = "test2";
table1Repo.Create(a);
unitOfWork.Commit();
}
}
//工作单元
public class UnitofWork : unitofwork.Models.IUnitofWork
{
private readonly ITransaction transaction;
private readonly ISession session;
public UnitofWork(ISession session)
{
this.session = session;
session.FlushMode = FlushMode.Auto;
transaction = session.BeginTransaction(IsolationLevel.ReadCommitted);
}
public void Commit()
{
if (!transaction.IsActive)
{
throw new InvalidOperationException("Oops! We don't have an active transaction");
}
transaction.Commit();
}
public void Rollback()
{
if (transaction.IsActive)
{
transaction.Rollback();
}
}
public void Dispose()
{
if (session.IsOpen)
{
session.Close();
}
}
}
答案 0 :(得分：5)
我使用的是“vanilla”ASP.NET，而不是ASP.NET MVC 3，但基本上我们正在做同样的事情。
首先，我有一个单独的UnitOfWork类，如下所示：
public class UnitOfWork
{
private static ISessionFactory SessionFactory
{
get
{
return Container.Get<ISessionFactory>();
}
}
public static ISession Session
{
get
{
return SessionFactory.GetCurrentSession();
}
}
public static void Start()
{
CurrentSessionContext.Bind(SessionFactory.OpenSession());
Session.FlushMode = FlushMode.Commit;
Session.BeginTransaction(IsolationLevel.ReadCommitted);
}
public static void Rollback()
{
Rollback(true);
}
/// <summary>
/// Rollback the current transaction, and optionally start a new transaction
/// </summary>
/// <param name="startNew">Whether to start a new transaction and keep the session open</param>
public static void Rollback(bool startNew)
{
ISession session = CurrentSessionContext.Unbind(SessionFactory);
if (session != null)
{
// Rollback current transaction
if (session.Transaction.IsActive && !session.Transaction.WasRolledBack)
{
session.Transaction.Rollback();
}
// Close and discard the current session
session.Close();
session.Dispose();
session = null;
}
if (startNew)
{
Start();
}
}
/// <summary>
/// Commit the current transaction, keeping the current session open and starting a new transaction
///
/// Call Commit multiple times during a single unit of work if you want to commit database changes in
/// multiple transactions
/// </summary>
public static void Commit()
{
Commit(true);
}
/// <summary>
/// Commit the current transaction, and optionally keep the session open and start a new transaction
///
/// Call Commit multiple times during a single unit of work if you want to commit database changes in
/// multiple transactions
/// </summary>
/// <param name="startNew">Whether to start a new transaction and keep the session open</param>
public static void Commit(bool startNew)
{
if (startNew)
{
Session.Transaction.Commit();
Session.BeginTransaction(IsolationLevel.ReadCommitted);
}
else
{
ISession session = CurrentSessionContext.Unbind(SessionFactory);
if (session != null)
{
if (session.Transaction.IsActive && !session.Transaction.WasRolledBack)
{
session.Transaction.Commit();
}
session.Close();
session.Dispose();
session = null;
}
}
}
}
我使用HTTP模块为每个Web请求启动一个新的工作单元，并自动提交/回滚。使用ASP.NET MVC 3时不确定是否需要HTTP模块，或者是否有其他方法可以执行此操作。无论如何，相关部分如下所示：
public class IoCHttpModule : IHttpModule, IDisposable
{
private HttpApplication httpApplication;
public void Init(HttpApplication context)
{
if (context == null)
throw new ArgumentException("context");
this.httpApplication = context;
this.httpApplication.BeginRequest += new EventHandler(BeginRequest);
this.httpApplication.EndRequest += new EventHandler(EndRequest);
this.httpApplication.Error += new EventHandler(Error);
StandardIoCSetup.Initialise(SessionContextType.Web);
}
private void BeginRequest(object sender, EventArgs e)
{
UnitOfWork.Start();
}
private void EndRequest(object sender, EventArgs e)
{
UnitOfWork.Commit(false);
}
private void Error(object sender, EventArgs e)
{
UnitOfWork.Rollback(false);
}
public void Dispose()
{
if (this.httpApplication == null)
return;
this.httpApplication.Dispose();
}
}
因此，每个Web请求都会启动一个新的工作单元，如果没有未处理的异常，则会自动提交。当然，如果需要，您可以在网络请求中手动呼叫UnitOfWork.Commit()或UnitOfWork.Rollback()。第StandardIoCSetup.Initialise...行使用Ninject模块配置NHibernate，与您现在的操作非常相似。
所以从本质上讲，将一个工作单元添加到你已有的工作中并不是很多。