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From: Dain Sundstrom <dsundstrom@gluecode.com>
Subject: Re: net.sf.cglib.core.CodeGenerationException: what does usually mean
Date: Mon, 22 Nov 2004 08:40:53 -0800
To: dev@geronimo.apache.org

On Nov 22, 2004, at 3:38 AM, Srinath Perera wrote:

> Hi All;
>
> Am getting this net.sf.cglib.core.CodeGenerationException:  quite
> regulerly. I know that means something wrong with the GBean I am
> trying to start! but spending long times to find where is the error.

Judging from the stack trace, you have a reference from one gbean to 
another and that reference is a java class type (not a interface).  In 
geronimo, we always proxy references, which means that we treat the 
reference type as an interface.  When a class type is used instead of 
an interface, it must have a default no-arg constructor because we 
generate a subclass of the reference type, and override all public 
methods, effectively making it an interface.

Most of the time it is better to use an interface, but sometimes it is 
not possible due to an implementation.

> Is there any way to get more error messages? or  may be should write a
> "Gbean verifier" to  check for the conditions and give better error

There is currently no way to get better (any :) error messages.  A 
GBeanInfo verifier would be nice.

-dain