[BuildSessionFactory] Creating new instances of objects?

[Michael Powell]

Hello,

I am curious, I have a stack trace that indicates building a session
factory is actually creating new instances of my mapped (?) domain
model?

Is that accurate? If so, why? What's wrong with doing a little
reflection followed closely by throwing an exception, or even, if
possible, using the "new()" generic constraint?

I kind of expect a handshake of sorts between any data layer and the
underlying model, but I'm not sure this is the right time and/or way
to find it out.

> Football.dll!Football.Models.GameSituation.Initialize() Line 927 C#
Football.dll!Football.Models.GameSituation.GameSituation() Line 905
+ 0x9 bytes C#
[External Code]
FluentNHibernate.dll!FluentNHibernate.Cfg.FluentConfiguration.BuildSessionFactory()
Line 230 + 0x18 bytes C#
Football.Data.dll!Football.Data.Repository.Hibernate.NHibernateSessionFactoryManagerBase.CreateFactory()
Line 131 + 0xb bytes C#
Kingdom.Repository.dll!Kingdom.Repository.SessionFactoryManagerBase<NHibernate.ISessionFactory>.Factory.get()
Line 37 + 0x1a bytes C#
Football.Migrator.exe!Football.Migrator.Program.PlanWork(System.Action<Kingdom.Repository.IRepository>
workPlan) Line 39 + 0xe bytes C#
Football.Migrator.exe!Football.Migrator.Program.Main(string[] args)
Line 66 + 0x36 bytes C#
[External Code]

Suggestions?

Thank you.

Regards,

Michael Powell

[Gleb Chermennov]

Hello Michael, 

as far as I know, creating a session factory shouldn't instantiate any of your domain objects.

May be you can share your code here or in an email?

четверг, 11 февраля 2016 г., 17:44:15 UTC+3 пользователь mwpowellhtx написал:

[mwpowellhtx]

On Friday, February 12, 2016 at 5:19:04 AM UTC-5, Gleb Chermennov wrote:

Hello Michael, 

as far as I know, creating a session factory shouldn't instantiate any of your domain objects.

May be you can share your code here or in an email?

I've got a stack trace that says new instances are being created. If not Fluent/NHibernate code, then the proxy instance DLL creation?

> Football.dll!Football.Models.GameSituation.GameSituation() Line 905 C#

[mwpowellhtx]

On Saturday, February 13, 2016 at 11:14:26 AM UTC-5, mwpowellhtx wrote:

On Friday, February 12, 2016 at 5:19:04 AM UTC-5, Gleb Chermennov wrote:

Hello Michael, 

as far as I know, creating a session factory shouldn't instantiate any of your domain objects.

May be you can share your code here or in an email?

Let's put it another way, when I put a unit test in your Fluent NHibernate that a test model's default ctor should not be invoked, literally call Assert.Fail() in the default ctor, then this should be sufficient to test that hypothesis?

[mwpowellhtx]

On Saturday, February 13, 2016 at 11:30:24 AM UTC-5, mwpowellhtx wrote:

On Saturday, February 13, 2016 at 11:14:26 AM UTC-5, mwpowellhtx wrote:

On Friday, February 12, 2016 at 5:19:04 AM UTC-5, Gleb Chermennov wrote:

Hello Michael, 

as far as I know, creating a session factory shouldn't instantiate any of your domain objects.

May be you can share your code here or in an email?

Let's put it another way, when I put a unit test in your Fluent NHibernate that a test model's default ctor should not be invoked, literally call Assert.Fail() in the default ctor, then this should be sufficient to test that hypothesis?

Best guess without diving much further, somewhere in the bowels of this NHibernate-Core monster:

/// <summary>

/// Instantiate a new <see cref="ISessionFactory" />, using the properties and mappings in this

/// configuration. The <see cref="ISessionFactory" /> will be immutable, so changes made to the

/// configuration after building the <see cref="ISessionFactory" /> will not affect it.

/// </summary>

/// <returns>An <see cref="ISessionFactory" /> instance.</returns>

public ISessionFactory BuildSessionFactory()

{

ConfigureProxyFactoryFactory();

SecondPassCompile();

Validate();

Environment.VerifyProperties(properties);

Settings settings = BuildSettings();

// Ok, don't need schemas anymore, so free them

Schemas = null;

return new SessionFactoryImpl(this, mapping, settings, GetInitializedEventListeners());

}

[Gleb Chermennov]

I think the proxy suggestion is worth checking out.

About NHibernate itself - try asking on their mailing list.

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Yours faithfully, 

Gleb

[mwpowellhtx]

On Saturday, February 13, 2016 at 1:41:20 PM UTC-5, Gleb Chermennov wrote:

I think the proxy suggestion is worth checking out.

Thanks. This looks like the likely culprit.

 

About NHibernate itself - try asking on their mailing list.

Already on it. Appreciate the feedback.