How to implement session-per-request pattern in asp.net mvc with Nhibernate

Question

I created the nhibernate session in Application_start event of global.asax file,the session is being passed to constructors of service methods.

In the service method

Answer 1

Only way to make it thread safe is to create a new session per each request, you could use current_session_context_class property to managed_web in NHibernate config.

In global.asax

    protected void Application_BeginRequest(object sender, EventArgs e)
    {
        var session = SessionFactory.OpenSession();
        CurrentSessionContext.Bind(session);
    }

    protected void Application_EndRequest(object sender, EventArgs e)
    {
        var session = CurrentSessionContext.Unbind(SessionFactory);
        //commit transaction and close the session
    }

now when you want to access the session, you could use,

Global.SessionFactory.GetCurrentSession()

If you are using a DI container, it's usually built into the container,

For example for Autofac (see this question for more information),

containerBuilder.Register(x => {
    return x.Resolve().OpenSession(); 
}).As().InstancePerHttpRequest();