J'ai eu pas mal de difficultés il y a quelques mois. Mon problème était avec MS SQL Server et Oracle.
Ce que j'ai fait, c'est créer deux fichiers de configuration distincts pour 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>
J'utilise cette classe simple pour construire ma SessionFactory nhibernate :
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());
}
}
Comme vous pouvez le voir, je passe à ma NHibernateSessionFactory une chaîne de connexion (je préfère l'enregistrer dans le fichier de configuration de mon application) et le nom (sans le chemin) du fichier de configuration nhibernate.
Personnellement, j'utilise un conteneur DI (StructureMap) et vous pouvez obtenir quelque chose de très cool en définissant une classe de registre :
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");
}
}
dans laquelle vous pouvez utiliser des instances nommées.Ma couche de services utilise ensuite une classe de registre StructureMap dans laquelle vous pouvez définir les constructeurs :
this.For<IOrdersService>()
.HybridHttpOrThreadLocalScoped()
.Use<OrdersService>()
.Ctor<ISession>("sessionMDII").Is(x => x.TheInstanceNamed("OracleSession"))
.Ctor<ISession>("sessionSpedizioni").Is(x => x.TheInstanceNamed("MsSqlSession"));
Pour la mise en œuvre de votre service :
public class OrdersService : IOrdersService
{
private readonly ISession SessionMDII;
private readonly ISession SessionSpedizioni;
public OrdersService(ISession sessionMDII, ISession sessionSpedizioni)
{
this.SessionMDII = sessionMDII;
this.SessionSpedizioni = sessionSpedizioni;
}
...
}