What are the best practices to use NHiberante sessions in asp.net (mvc/web api) ?
- by mrt181
I have the following setup in my project:
public class WebApiApplication : System.Web.HttpApplication
{
public static ISessionFactory SessionFactory { get; private set; }
public WebApiApplication()
{
this.BeginRequest += delegate
{
var session = SessionFactory.OpenSession();
CurrentSessionContext.Bind(session);
};
this.EndRequest += delegate
{
var session = SessionFactory.GetCurrentSession();
if (session == null)
{
return;
}
session = CurrentSessionContext.Unbind(SessionFactory);
session.Dispose();
};
}
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
var assembly = Assembly.GetCallingAssembly();
SessionFactory = new NHibernateHelper(assembly, Server.MapPath("/")).SessionFactory;
}
}
public class PositionsController : ApiController
{
private readonly ISession session;
public PositionsController()
{
this.session = WebApiApplication.SessionFactory.GetCurrentSession();
}
public IEnumerable<Position> Get()
{
var result = this.session.Query<Position>().Cacheable().ToList();
if (!result.Any())
{
throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound));
}
return result;
}
public HttpResponseMessage Post(PositionDataTransfer dto)
{
//TODO: Map dto to model
IEnumerable<Position> positions = null;
using (var transaction = this.session.BeginTransaction())
{
this.session.SaveOrUpdate(positions);
try
{
transaction.Commit();
}
catch (StaleObjectStateException)
{
if (transaction != null && transaction.IsActive)
{
transaction.Rollback();
}
}
}
var response = this.Request.CreateResponse(HttpStatusCode.Created, dto);
response.Headers.Location = new Uri(this.Request.RequestUri.AbsoluteUri + "/" + dto.Name);
return response;
}
public void Put(int id, string value)
{
//TODO: Implement PUT
throw new NotImplementedException();
}
public void Delete(int id)
{
//TODO: Implement DELETE
throw new NotImplementedException();
}
}
I am not sure if this is the recommended way to insert the session into the controller.
I was thinking about using DI but i am not sure how to inject the session that is opened and binded in the BeginRequest delegate into the Controllers constructor to get this
public PositionsController(ISession session)
{
this.session = session;
}
Question: What is the recommended way to use NHiberante sessions in asp.net mvc/web api ?
