我使用
- nhibernate + fluent nhibernate asp.net mvc 3
- ninject
目前我正在使用nhibernate, ninject与存储库模式和服务层。
这里是
ninject
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一次nhibernate会话工厂，然后在需要时使用它给我会话。
One事务的开始我开始一个事务，并在结束时关闭事务。
我这样做的原因是因为当我使用nhibernate分析器时，我会得到很多关于使用隐式事务的警告。这有点像给问题贴上了标签，但从来没有真正解决它(它减少了数量，但任何延迟加载的东西仍然会遇到这个问题)。
一个repo示例
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.
}
}
这就是我所拥有的。
我想使用工作单元模式，这样我就可以提交更多的事情，并正确地处理事务(因为现在我被告知我做得不太对)
所以我在寻找一个简单的例子，如何让他们一起工作，并找出我需要改变多少，我已经得到了。
我看到的大多数教程比我想要的更复杂。大多数人都做TDD，并制作通用存储库，这是好的，但在我到达那个阶段之前，我希望看到一个教程，即使它是重复的代码，也能简单地做事情。
编辑
所以我一直在摆弄它，想出了这个非常非常简单的例子。我不确定我做得对不对。
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>();
}
非hibernate工厂类见原文
// 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();
}
}
//
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);
}
}
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();
}
}
}
我使用的是'vanilla' ASP。. NET，而不是ASP。. NET MVC 3，但本质上我们是在做同样的事情。
首先，我有一个单独的UnitOfWork类，像这样:
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。不确定使用ASP时是否需要HTTP模块。NET MVC 3，或者如果有其他方法的话。总之，相关部分如下:
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，您也可以在web请求中手动调用UnitOfWork.Commit()或UnitOfWork.Rollback()。StandardIoCSetup.Initialise...行使用Ninject模块配置NHibernate，与您已经做的基本相同。
所以从本质上讲，在已有的基础上增加一个工作单元并不需要做太多的工作。