Comments on: Extending NHibernate’s DriverConnectionProvider

By: Gebb

Gebb — Mon, 06 Sep 2010 09:07:14 +0000

It works. Thank you very much!

By: The Inquisitive Coder - Davy Brion’s Blog » Blog Archive » Avoiding MySQL’s MAX_JOIN_SIZE Limit With NHibernate

Mon, 30 Mar 2009 11:26:58 +0000

[...] remembered a trick i had used earlier, which is to extend NHibernate’s DriverConnectionProvider. It could then set the setting with [...]

By: tobsen

tobsen — Mon, 13 Oct 2008 12:37:50 +0000

Ok, at least I didn’t missed some obvious thing
Thanks again for your fast reply!

By: Davy Brion

Davy Brion — Mon, 13 Oct 2008 12:33:03 +0000

ah ok, i see what you mean… unfortunately, i don’t think it’s gonna be possible without an ugly hack :p

By: tobsen

tobsen — Mon, 13 Oct 2008 12:31:04 +0000

Wow, quick reply, thanks!
Well, I think I need it the other way around: MyProvider has no external dependencies.
However I have another component (AnotherComponent) which needs the same MyProvider instance Nhibernate is using.

The MyProvider implements two interfaces:
public class MyProvider : NHibernate.Connection.DriverConnectionProvider, IAnotherInterface

AnotherComponent needs an Object of type IAnotherInterface:
public AnotherComponent(IAnotherInterface needsToBeTheSameMyProviderInstance)

If I could set an Instance to NHibernate, I could let Spring do the binding via its config for both NHibernate as well as for AnotherComponent.

Any idea or am I just missing something?

By: Davy Brion

Davy Brion — Mon, 13 Oct 2008 11:50:56 +0000

I can’t find anything regarding a ConnectionProvider factory or anything like that, so i don’t think you can make it do what you want to do.

You could provide two constructors to achieve what you want though…

public MyProvider() : this(IoC.Resolve(typeof(IDependency1)), IoC.Resolve(typeof(IDependency2)))
{}

public MyProvider(IDependency1 dep1, IDependency2 dep2)
{
…
}

Not perfect, but if no other way exists, it’s not so bad i guess

btw, i used the Resolve(typeof())) syntax because i’m too lazy to find out how to escape the generic bracket thingies :p

By: tobsen

tobsen — Mon, 13 Oct 2008 11:43:08 +0000

Well, that was easy. But how can I set the actual connection.provider programmtically? I would like to create the MyDriverConnectionProvider instance myself (or let another DI-container…) and pass the initialized instance to Nhibernate. Do you know how to do that?

By: pho

pho — Fri, 19 Sep 2008 14:24:11 +0000

now that IS easy!

By: Extending NHibernate's DriverConnectionProvider - NHibernate blog - NHibernate Forge

Thu, 18 Sep 2008 18:53:08 +0000

[...] Note: this was orginally posted on my own blog [...]