nHibernate and webservices

[Jakes]

I have a problem using nHibernate in my webservice.

Its first time i have used nHibernate in a Webservice but have used it in my ASP.NET applications for the last 4-5 years.

What i would like to do is have some of the functions in my ASP.NET application be available though a webservice.

I have made som DataTransferObjects because i dont need all the data for the objects going though the webservice.

When i try to get some data though the DAL (which works fine in the ASP.NET application) then i get an error that the session (gues its the nHibernate session) is not initialized???

Do i have to do something speciel with the nHibernate session to get it to work though a webservice that i do not need in a ASP.NET aplication.

Hobe some one can help me.

Regards,

Jacob

[Ricardo Peres]

You are using lazy collections/properties, right? How are you passing data from your entities to the DTOs?

Can you post your code?

[Jakes]

Hi,

I think my problem is im using the same instance all the time in my webapplications.

Like this is my businessObject which initialize the nHibernate session in its constructor.

        public static Business Get()

        {

            return _instance ?? (_instance = new Business());

        }

So when i need to use my business i do it like this.

            IBusiness biz = Business.Get();

            biz.Category.Read();

Can i do this in a webservice.

Regarding how im passing the data to the DTO im using linq like this, where WsEvent is my DTO and Event is my nhibernate object.:

        public WsEvent[] GetServiceEvents()

        {

            return (from e in Business.Get().Event.Read() select new WsEvent {EventId = e.Id, EventName = e.Name})

                    .ToArray();

        }

Any suggestions what to do?

Regards,

Jacob

[Oskar Berggren]

I don't quite understand how your code works, but some general pointers:
The session is commonly rather short-lived (but not too short. "unit-of-work" is common while "application-lifetime" is not typical).
If the session is in what appears to be a singleton Business object, how are you handling multithreading?

/Oskar

2012/9/4 Jakes <ImJ...@gmail.com>

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