Problem with Introduction when using MultiThreading

[cylt]

Hi,

I've a problem when using the introduction feature from another thread than the main one.
If this sample code is called from the main thread it work well :

object _Component;
_Component = m_Context.GetObject("SomeComponent");

ProxyFactory factory = new ProxyFactory(_Component);
factory.ExposeProxy = true;
factory.ProxyTargetType = true;
factory.Target = _Component;
factory.AddIntroduction(new ClassToIntroduceAdvisor());
Object _proxy = factory.GetProxy();
((IClassToIntroduce)_proxy).Data1 = "some text";
((IClassToIntroduce)_proxy).Data2 = 1234;


but if I call it from a new thread if failed at:
((IClassToIntroduce)_proxy).Data1 = "some text"; with the System.NullReferenceException.

It look like if a introduction have been done on some thread it's not possible
to do it again on a another thread.

Could someone help me understanding this problem ?

I can send a little demo VS projet if needed.

Thanks

Yann.

[Bruno Baia]

Hi Yann,

It can be related to this issue :
http://opensource.atlassian.com/projects/spring/browse/SPRNET-340

Can you try what Aleksei proposed ?


-Bruno

[cylt]

Hi Bruno,

Thank you for your response.
I've tried what Aleksei has proposed in the link you send but I'm not sure to understand correctly and exactly what to do...
If I add IDictionary _targetMethods = new Hashtable() in BuildProxy then I got a new error (NullReferenceException) on "Object _proxy = factory.GetProxy()" in my previous code snippet.
Aleksei said to "move" IDictionary _targetMethods = new Hashtable() in BuildProxy() but _targetMethods is used in other methods so it's seems to me that we could not "move" this line of code...

I must admit that all this is a little unclear for me ...

Yann.

[Aleksei Kachanov]

Sorry, I not clear explain solution.
You should pass __targetMethods in other methods from BuildProxy()
Example

// implement interfaces

foreach (Type intf in advised.Interfaces)
{
object target = advised.InterfaceMap[intf];
if (target == null)
{
ImplementTargetInterface(typeBuilder, intf, advised.TargetSource.TargetType, _targetMethods);
}
else if (target is IIntroductionAdvisor)
{
ImplementIntroductionInterface(typeBuilder, intf, advised.IndexOf((IIntroductionAdvisor)target), ((IIntroductionAdvisor)target).Advice.GetType(), _targetMethods);
}
}



protected virtual void ImplementTargetInterface(TypeBuilder typeBuilder, Type intf, Type targetType, IDictionary _targetMethods)
...
protected virtual void ImplementIntroductionInterface(TypeBuilder typeBuilder, Type intf, int index, Type introductionType, IDictionary _targetMethods)
...
protected virtual void ImplementMethods(TypeBuilder typeBuilder, IProxyMethodBuilder methodBuilder, InterfaceMapping mapping, IDictionary _targetMethods)

[cylt]

Hi Aleksei,

Thank you for your response.
Looking at the problem now, your explanation was clear but my extrapolation capabilities was not ;)

I've done the modifications now but I still have the same behavior that I've described in my first post. The same System.NullReferenceException when calling "((IClassToIntroduce)_proxy).Data1 = "some text";".

I've attach to this post the sample code I use for my tests, may be it could help solving this problem...

Yann.

[Aleksei Kachanov]

Your problem is not related to http://opensource.atlassian.com/projects/spring/browse/SPRNET-340

[Bruno Baia]

Hi,

Thks for your help Aleksei.
As you said, it seems to be not related to the SPRNET-340 issue.

Yann, try changing the StaticAttribute to ContexAttribute for the static field "_proxyStack" in the class Spring.Aop.Framework.AopContext.

-Bruno

[cylt]

Hi,

Thank you for you help, It seem to work now on my sample app. I will try this on the real project in some weeks.

Thanks a lot again.

Yann.

[Bruno Baia]

Hi,

This issue has been resolved, retrieve the next latest nightly build (http://www.springframework.net/downloads/nightly/) to get the fix.


-Bruno