Re: help! gbean ref doesn't contain added interfaces

[Sachin Patel]

Thanks David.. but I think there may be more wrong.. I'm not doing  
anything complicated as here is exactly what I'm doing...

(1) AbstractWebModuleBuilder I added an additional interface  
ModuleBuilder2
(2) Tomcat/JettyModuleBuilder add an additional addInterface() in  
GBeanInfo block for ModuleBuilder2

Now in EARConfigBuilder...

If I keep the referencyType ModuleBuilder.class, then when  
getWebConfigBuilder() is called I get a class cast casting it to  
ModuleBuilder2.  Now based on what you state below, my referenceType  
should be ModuleBuilder2.  However, in this case, getWebConfigBuilder 
() returns me null.  If I add 2 references one of with  
ModuleBuilder2.class and ModuleBuilder.class, getWebConfigBuilder()  
also returns null.

Grrr.  Why does webConfigBuilder.getElement() return null?

Thanks

On Dec 2, 2006, at 3:59 AM, David Jencks wrote:

I might be misunderstanding what you are trying to do....

When you have a gbean reference, you have to declare the interface  
you are going to use in the GBeanReferenceInfo you set up in that  
static block of code.  You'll get a proxy implementing exactly that  
interface and nothing else AFAIK.  So if you want to use 2  
interfaces that a gbean implements, and neither extends the other,  
you need 2 references.

You might be able to declare the "interface" to be the gbean  class  
itself (as long as it has a no-arg constructor) and then you should  
get a proxy implementing everything in the gbean itself.  Be sure  
not to have any public final methods in the gbean if you do this.

Hope this helps
david jencks

On Dec 1, 2006, at 7:31 PM, Sachin Patel wrote:

Yep, the GBean does implement the interface, and the GBean isn't a  
new GBean, I just modified an existing GBean with an additional  
interface.

On Dec 1, 2006, at 5:18 PM, Aaron Mulder wrote:

Are you sure the GBean in question actually implements the  
interface?
And that the module builder you're interacting with is definitely
using the implementation class you think it is?  (Maybe you copy and
pasted the GBeanInfo block from old to new GBean and it's  
referring to
the old class instead of the new class in the GBeanInfo in the new
class?)

Thanks,
     Aaron

On 12/1/06, Sachin Patel <[EMAIL PROTECTED]> wrote:
Thanks Aaron.. see inline.


On Dec 1, 2006, at 4:20 PM, Aaron Mulder wrote:

So what you get back is ordinarily a proxy to the actual  
service.  If
you get the abstract name for the returned module builder (the  
kernel
has a call to do that) and then get a fresh proxy to it (from the
proxy manager from the kernel), does it include your new interface?

Yes, creating a fresh proxy includes the new interface, but  
unfortunately
that only gets me passed the class cast, as it throws an  
exception "No
implementation method" when calling a method on the interface.  :(

If so, it suggests that the proxies generated for the reference
include only the interfaces that match the reference type.

Thats what I assumed, but if I changed the reference type to the  
new
interface, then for some reason getWebConfigBuilder() returns  
null, so
something was still expecting the referenceType for the builders  
to be
ModuleBuilder.class.


If not, it
may be that the class loader that's provided to create the proxy
doesn't include the added interface (though there used to be a  
warning
emitted every time this happened).
I'm not sure what could be done to
work around that -- maybe either add the interface to other  
modules as
needed or contrive to use the right module's class loader to create
the proxy.

Thanks,
    Aaron

On 12/1/06, Sachin Patel <[EMAIL PROTECTED]> wrote:

I'm having some trouble figuring out why I'm getting a  
ClassCastException
and would appreciate if someone could shed some light...

In TomcatModuleBuilder I implement an "additional" interface  
ModuleBuilder2
as well as add..

static {
...
 infoBuilder.addInterface(ModuleBuilder2.class)
...
}

But then in EARConfigBuilder if I call...

((ModuleBuilder2) getWebConfigBuilder())

I get a ClassCastException casting it to ModuleBuilder2 during  
the building
of the configs which I don't understand why.  If I inspect the  
interfaces of
getWebConfigBuilder() it only returns ModuleBuilder and
GeronimoManagedGBean.  Why isn't ModuleBuilder2 being listed?

I tried updated the referenceType for WebBuilder in  
EARConfigBuilder from
ModuleBuilder to ModuleBuilder2, but then in that case  
getWebConfigBuilder
ends up returning null.

What am I missing? Why can't I add an additional interface to the
TomcatModuleBuilder GBean?

Thanks

-sachin




-sachin




-sachin





-sachin