Re: Can GBean get its configuration ClassLoader?

[David Jencks]

On Nov 18, 2004, at 9:54 PM, Srinath Perera wrote:
Just two quick question,
1) is there anyway one can add/register magic attributes form code or
plan? (Just for INFO have not find for use case for it yet :) )
no, unless you rewrite the GBeanMBean class.  There's a fairly wide 
variety, and a request to add a reference to ServerInfo as a magic 
attribute.  If you need another, discuss it: adding one is a moderately 
large architectural decision.
2) Does GBean constrcters support injecting magic attributes only?
You can inject any persistent attribute, magic attribute, or reference 
(collection).  Most gbeans now use constructor dependency injection 
only, and the ones that don't are being converted as their classes are 
worked on.

I think the normal ordering convention is to put regular persistent 
attributes first, then references (and reference collections), then 
magic attributes.

Attributes start with lower case letters, References with upper case.
note that magic attributes are NOT persistent, whereas regular 
attributes in the constructor must be persistent.

thanks
david jencks
Thanks
Srinath

On Thu, 18 Nov 2004 13:54:28 -0500 (EST), Aaron Mulder
<[EMAIL PROTECTED]> wrote:
        Right, you helped me out with this in person a few days ago...
Thanks.  BTW, as a note for anyone else who's interested, GBeanMBean 
has a
section at the bottom defining all the available magic attributes, and
there are a lot of them.  Dain pointed me to that, too.  :)

Aaron

On Thu, 18 Nov 2004, Dain Sundstrom wrote:
You simply declare an attribute of type ClassLoader, named
"classLoader", which is not persistent, and the framework will
automatically inject the correct class loader.
-dain
--
Dain Sundstrom
Chief Architect
Gluecode Software
310.536.8355, ext. 26
On Nov 18, 2004, at 7:49 AM, Alan D. Cabrera wrote:
-----Original Message-----
From: Aaron Mulder [mailto:[EMAIL PROTECTED]
Sent: Sunday, November 14, 2004 10:56 PM
To: [EMAIL PROTECTED]
Subject: Can GBean get its configuration ClassLoader?
   I wonder if there's a way for a GBean to get the ClassLoader for
the configuration it's a part of -- in other words, the
GBeanMBean.getClassLoader(), which includes the dependencies in the
deployment plan, etc.
   I want the SQLSecurityRealm to be able to load a driver class.
However, the SQLSecurityRealm itself was loaded in the Server
configuration, and the JDBC driver is included as a dependency of 
the
service deployment plan that declares the realm (but gets the
SQLSecurityRealm class from its parent).  So the SQLSecurityRealm
can't
see the driver classes in a child of it's own CL, and the
ThreadContextClassLoader does not appear to be set to something 
useful
when doStart is called on the GBean.
   I basically want to be able to call some static method to get
the
GBeanMBean for the current GBean implementation class, becasue 
then I
could get the ClassLoader from it.  But any other suggestions 
would be
appreciated too.  :)
Why not declare the driver in the same plan as the SQLSecurityRealm 
and
use the magic attribute classLoader?

Regards,
Alan