We have a WebSessionManager implemented as singleton which creates the
sessionfactory, using fluent configuration, as needed.
Here is the relevant code:
public class WebSessionManager : ISessionManager
{
private static WebSessionManager sessionManager;
private ISessionFactory sessionFactory;
private IConfigurationGenerator configurationGenerator;
public static WebSessionManager Instance
{
get { return sessionManager ?? (sessionManager = new
WebSessionManager()); }
}
public ISession Session
{
get
{
if (!
ManagedWebSessionContext.HasBind(HttpContext.Current,
this.SessionFactory))
{
ManagedWebSessionContext.Bind(HttpContext.Current,
this.SessionFactory.OpenSession());
}
return
this.SessionFactory.GetCurrentSession();
}
}
public ISessionFactory SessionFactory
{
get { return this.sessionFactory ?? (this.sessionFactory =
this.ConfigurationGenerator.Generate().BuildSessionFactory()); }
}
}
public class ConfigurationGenerator : IConfigurationGenerator
{
private readonly string connectionString;
private readonly string sessionContext; // Here: "managed_web"
public FluentConfiguration Generate()
{
FluentConfiguration config = Fluently.Configure()
.Database(MsSqlConfiguration.MsSql2005.ConnectionString(this.connectionString)
.ShowSql().CurrentSessionContext(this.sessionContext))
.Mappings(m =>
m.FluentMappings.AddFromAssemblyOf<IConfigurationGenerator>());
return config;
}
}
On Feb 16, 4:58 pm, James Gregory <jagregory....@gmail.com> wrote:
> Where and how are you creating your session factory?
>
> On Tue, Feb 16, 2010 at 3:06 PM, Schlaefisch
> <schlaefi...@googlemail.com>wrote:
>
> > Hi,
>
> > we're using fluent NHibernate within a SharePoint 2007 WebPart.
> > Everything works fine except for one problem:
>
> > If we reset the web server and 2 (or more) users try to browse the
> > WebPart, the session factory is created twice at the same time,
> > resulting in a null reference exception.
>
> > Is there any standard approach to prevent this?
>
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