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Subject Re: GBeans and Configurable Properties.
Date Wed, 02 Feb 2005 23:05:23 GMT
some related questions...

Currently the XML plans are not placed in the 
geronimo-assembly-1.0-SNAPSHOT.jar, they are placed in 
geronimo\modules\assembly\target\plan, which would only be available to 
those who build from the source code. 

Q1. Should we be relocating the plans so they are shipped as part of the 
geronimo-assembly-1.0-SNAPSHOT.jar so that users of a binary release can 
modify things such as port numbers?  This would be important if the 
default port is already in use.

Q2. Are there any plans to be able to convert serialized configurations 
(in the config-store) back into XML plans so:

  * one can see what their current system current configuration is, 
without having to navigate lots of screens in a management console and use 
text/XML tools to compare with earlier versions of plans or plans being 
used on another system (e.g. compare the differences between their test 
and production environments).  Change/Configuration management staff at 
large organisations would probably like this ability.

 * enable easier support of Geronimo or applications running on Geronimo, 
as users can send an XML plan to support staff that is easily readable.

  * users could export plans to XML, modify them and then use them on 
another system



David Jencks <> wrote on 03/02/2005 03:32:49 AM:

> On Feb 2, 2005, at 8:12 AM, Mark wrote:
> > A couple of questions:
> >
> > 1. If I have a GBean with an attribute "port", is this a required 
> > entry in the xml?   I am thinking that I can default to port X and if 
> > the user wants to reassing it then they can add the attribute 
> > <attribute name="port">Y</attribute> to the XML.
> What happens depends on a couple of things.
> If port is not a constructor argument, then if you leave it out of the 
> xml it won't get set (IIRC).
> If port is a constructor argument,
> if port is an Integer, then if it's missing null will be supplied.  You 
> can detect this and set port to whatever you want.
> if port is an int, then if its missing in the xml the default int value 
> of 0 will be supplied.  Whether this makes sense a as a legal but 
> non-default value will determine if you can detect it and set to your 
> intended default.
> In general I recommend only using constructor arguments, I usually find 
> it makes the rest of the code much simpler.
> >
> > 2. Lets say the user wants to install a geronimo server and assign a 
> > new port .  From what I can see, they will either have to:
> >    a. Change the attribute in the XML file and then redeploy the plan.
> >    b. Let the server start up on the default port, go into the 
> > management console and change the value and then shutdown the server. 
> > During shutdown the kernel will store the current configuration which 
> > will be loaded on the restart.
> That's my understanding also.  You are not the first to subtly imply 
> that this may not be the ultimate in high-tech management convenience 
> and sophistication.
> thanks
> david jencks
> >
> > Thanks
> > Mark
> >

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