Re: XInfo vs Spice metadata

On Mon, 2003-10-27 at 20:31, peter-4lf8KW9E9MLMqX/[email protected] wrote:
> Hi,
> 
> > > It also means users can add their own metadata with very little hassle.
> >
> > Why can't you use both approaches?
> 
> You can but encoding metadata into code either via marker interfaces or
> whatever is a hack that I would never recomend. So I would discourage it.

I wouldn't do it for via marker interfaces. I was thinking of a qdox
appoach to the get component info and allowing additional @tag type
attributes. I don't like the idea of using marker interfaces.

> > How often is the schema for your components really changing?
> 
> The xinfo format changed probably 10 times in 4 years - most of which was
> forward compatible. However we would have liked to have changed it a lot
> more often - it was just stuck with fears of having to support each change.
> At various times we have wanted traditional enterprise metadata (ie
> trransactions, security, remoting, session enabling etc) but other people
> have also wanted other metadata.
> 
> ie annotating implementation so that XSelector or XManager objects could
> create better ways of Selecting/Searching/Querying components.
> 
> > > We still do this. Currently we unmarshall the attribute metadata into
> two
> > > "rich" object models. The ComponentInfo object (for component metadata)
> and
> > > the MBeanModelInfo object (for management metadata). I am sure that
> future
> > > features will also map into rich object models if it is demanded.
> >
> > Ok, where are you doing that? Maybe I'll just lift that. I'm still
> > aiming for Loom/Plexus interop at the component level.
> 
> IIRC it is something like
> 
> jcontainer/loom/engine/src/java/org/jcontainer/loom/components/util/infobuil
> der/*
> 
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-- 
jvz.

Jason van Zyl
[email protected]
http://tambora.zenplex.org

In short, man creates for himself a new religion of a rational
and technical order to justify his work and to be justified in it.
  
  -- Jacques Ellul, The Technological Society