如何在MySQL服务器和Microsoft SQL Server 2008上同时使用NHibernate

问题描述

如何配置NHibernate以同时连接到MySQLserver和Microsoft SQL Server 2008?我确实想将数据从一台服务器复制到另一台服务器.我听说NHibernate分享了.

How can I configure NHibernate to connect to both a MySQLserver and a Microsoft SQL server 2008? I do want to copy data from one server to another. I heard of NHibernate shared.

推荐答案

几个月前，我一直在挣扎.我的问题出在MS Sql Server和Oracle.

I've struggled quite a bit few months ago.My problem was with MS Sql Server and Oracle.

我要做的是为nhibernate创建两个单独的配置文件:

What I've done is to create two separate config files for nhibernate:

sql.nhibernate.config

<?xml version="1.0" encoding="utf-8"?>
    <hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
      <reflection-optimizer use="false" />
      <session-factory name="BpSpedizioni.MsSql">
        <property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
        <property name="connection.driver_class">NHibernate.Driver.SqlClientDriver</property>
        <property name="dialect">NHibernate.Dialect.MsSql2008Dialect</property>
        <!-- <property name="connection.connection_string">Data Source=(local); Initial Catalog=NHibernate; Trusted_Connection=true;</property> -->
        <property name="current_session_context_class">web</property>
        <property name="adonet.batch_size">100</property>
        <property name="command_timeout">120</property>
        <property name="max_fetch_depth">3</property>
        <property name='prepare_sql'>true</property>
        <property name="query.substitutions">true 1, false 0, yes 'Y', no 'N'</property>
        <property name='proxyfactory.factory_class'>NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle</property>
        <mapping assembly="BpSpedizioni.Services"/>
      </session-factory>
</hibernate-configuration>

ora.nhibernate.config

<?xml version="1.0" encoding="utf-8"?>
<hibernate-configuration xmlns="urn:nhibernate-configuration-2.2">
  <reflection-optimizer use="false" />
  <session-factory name="BpSpedizioni.Oracle">
    <property name="connection.provider">NHibernate.Connection.DriverConnectionProvider</property>
    <property name="connection.driver_class">NHibernate.Driver.OracleDataClientDriver</property>
    <property name="dialect">NHibernate.Dialect.Oracle10gDialect</property>
    <!-- <property name="connection.connection_string">Data Source=(local); Initial Catalog=NHibernate; Trusted_Connection=true;</property> -->
    <property name="current_session_context_class">web</property>
    <property name="adonet.batch_size">100</property>
    <property name="command_timeout">120</property>
    <property name="max_fetch_depth">3</property>
    <property name='prepare_sql'>true</property>
    <property name="query.substitutions">true 1, false 0, yes 'Y', no 'N'</property>
    <property name='proxyfactory.factory_class'>NHibernate.ByteCode.Castle.ProxyFactoryFactory, NHibernate.ByteCode.Castle</property>
    <mapping assembly="BpSpedizioni.Services"/>
  </session-factory>
</hibernate-configuration>

我使用这个简单的类来构建我的nhibernate SessionFactory:

I use this simple class to build my nhibernate SessionFactory:

    public class NHibernateSessionFactory
    {
        private ISessionFactory sessionFactory;

        private readonly string ConnectionString = "";
        private readonly string nHibernateConfigFile = "";

        public NHibernateSessionFactory(String connectionString, string nHConfigFile)
        {
            this.ConnectionString = connectionString;
            this.nHibernateConfigFile = nHConfigFile;
        }

        public ISessionFactory SessionFactory
        {
            get { return sessionFactory ?? (sessionFactory = CreateSessionFactory()); }
        }

        private ISessionFactory CreateSessionFactory()
        {
            Configuration cfg;
            cfg = new Configuration().Configure(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, this.nHibernateConfigFile));

            // With this row below Nhibernate searches for the connection string inside the App.Config.
            // cfg.SetProperty(NHibernate.Cfg.Environment.ConnectionStringName, System.Environment.MachineName);
            cfg.SetProperty(NHibernate.Cfg.Environment.ConnectionString, this.ConnectionString);

#if DEBUG
            cfg.SetProperty(NHibernate.Cfg.Environment.GenerateStatistics, "true");
            cfg.SetProperty(NHibernate.Cfg.Environment.ShowSql, "true");
#endif

            return (cfg.BuildSessionFactory());
        }
    }

如您所见，我将一个连接字符串(我更喜欢将其保存在我的应用程序配置文件中)和nhibernate配置文件的名称(无路径)传递给NHibernateSessionFactory.

As you can see I pass to my NHibernateSessionFactory a connection string (I prefer to save it in my app config file) and the name (without the path) of the nhibernate config file.

我个人使用了一个DI容器(StructureMap)，您可以通过定义注册表类来实现一些非常酷的事情:

I personally use a DI container (StructureMap) and you can achieve something very cool defining a registry class:

public class NhibernateRegistry : Registry
{
    public NhibernateRegistry()
    {

        For<ISessionFactory>()
        .Singleton()
        .Add(new NHibernateSessionFactory(<oracle connection string>, "ora.nhibernate.config").SessionFactory)
        .Named("OracleSF");

        For<ISession>()
        .HybridHttpOrThreadLocalScoped()
        .Add(o => o.GetInstance<ISessionFactory>("OracleSF").OpenSession())
        .Named("OracleSession");

        For<ISessionFactory>()
        .Singleton()
        .Add(new NHibernateSessionFactory(<ms sql connection string>, "sql.nhibernate.config").SessionFactory)
        .Named("MsSqlSF");

        For<ISession>()
        .HybridHttpOrThreadLocalScoped()
        .Add(o => o.GetInstance<ISessionFactory>("MsSqlSF").OpenSession())
        .Named("MsSqlSession");
    }
}

，您可以在其中使用命名实例.我的服务层使用的是StructureMap注册表类，您可以在其中定义构造函数:

in which you can use named instances.My services layer than uses a StructureMap registry class where you can define the constructors:

this.For<IOrdersService>()
     .HybridHttpOrThreadLocalScoped()
     .Use<OrdersService>()
     .Ctor<ISession>("sessionMDII").Is(x => x.TheInstanceNamed("OracleSession"))
     .Ctor<ISession>("sessionSpedizioni").Is(x => x.TheInstanceNamed("MsSqlSession"));

对于您的服务实施:

public class OrdersService : IOrdersService
{
        private readonly ISession SessionMDII;
        private readonly ISession SessionSpedizioni;

        public OrdersService(ISession sessionMDII, ISession sessionSpedizioni)
        {
            this.SessionMDII = sessionMDII;
            this.SessionSpedizioni = sessionSpedizioni;
        }

    ...
}

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