我需要一个使用nhibernate +工作单元+存储库模式+服务层+对象的简单示例
我需要一个使用nhibernate +工作单元+存储库模式+服务层+对象的简单示例
提问于 2011-08-19 03:48:27
我正在使用
fluent nhibernate
- asp.net mvc 3
- ninject
+
- nhibernate
目前我使用的是nhibernate，它包含了存储库模式和服务层。
所以我有这个
九个对象
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();
}
}
}因此，我在应用程序的生命周期中创建了一次nhibernate会话工厂，然后在需要时使用它给我会话。
在事务开始时，我启动一个事务，在结束时，我关闭该事务。
我这么做的原因是因为当我使用nhibernate分析器时，我会收到很多关于使用 implicit transactions的警告，这就像是给问题贴了个创可贴，但从来没有真正解决过它(它减少了数量，但任何懒惰的加载仍然会导致这个问题)。
示例存储库
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;
}
}服务层
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，这样我就可以提交更多的东西，并正确地处理事务(as right now I been told that I am doing them not quite right)
因此，我正在寻找一个简单的示例，说明如何让它们协同工作，并找出我需要对目前所获得的内容进行多少更改。
我看到的大多数教程都比我想的要复杂得多。大多数人都做TDD，并将泛型存储库做得很好，但在我进入那个阶段之前，我希望看到一个教程，即使它是重复代码，也能做到很简单。
编辑
所以我一直在玩弄它，想出了一个非常简单的例子。我不确定我做得对不对。
对象
/// <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post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();
}
}//域名
public class Table1
{
public virtual int Id { get; private set; }
public virtual string C1 { get; set; }
public virtual string C2 { get; set; }
}// Fluent映射
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();
}
}
}回答 1
Stack Overflow用户
回答已采纳
发布于 2011-08-19 14:58:05
我使用的是'vanilla‘ASP.NET，而不是ASP.NET MVC3，但本质上我们在做同样的事情。
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。不确定在使用ASP.NET MVC3时是否需要HTTP模块，或者是否有其他方法。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web请求中手动调用UnitOfWork.Commit()或UnitOfWork.Rollback()。行StandardIoCSetup.Initialise...使用一个StandardIoCSetup.Initialise...模块来配置NHibernate，这与您已经在做的事情非常相似。
因此，从本质上讲，在已有的基础上添加一个工作单元并不是一件很容易的事情。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/7113245
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