在ASP.NET MVC环境中使用石英,使用NHibernate Burrow

我尝试了一种简单而天真的方式,至少目前看来是可行的。我在这里做的有什么根本性的错误吗?当线程退出时,这些变量会被垃圾收集吗?

public static class SessionManager
{
    [ThreadStatic]
    private static IDictionary<ISessionFactory, ISession> _sessions;

    public static ISession GetSession(Type type)
    {
        var burrow = new BurrowFramework();

        if (burrow.WorkSpaceIsReady)
        {
            return burrow.GetSession(type);
        }
        else
        {
            if (_sessions == null)
            {
                _sessions = new Dictionary<ISessionFactory, ISession>();
            }

            var factory = burrow.GetSessionFactory(type);
            if (!_sessions.ContainsKey(factory))
            {
                _sessions[factory] = null;
            }

            var session = _sessions[factory];
            if (session == null || !session.IsOpen)
            {
                session = _sessions[factory] = factory.OpenSession();
            }

            return session;
        }
    }
}