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From Sylvain Wallez <sylvain.wal...@anyware-tech.com>
Subject Re: [Vote]: Where to define the sitemap components?
Date Thu, 14 Mar 2002 12:49:22 GMT
Carsten Ziegeler wrote:

>Ok, this seems to be a very difficult task then.
>
>Let me state the following:
>a) There shouldn't be two places where one can define the sitemap
>components,
>   so it's rather the xconf or the sitemap. But having both is absolutly
>   confusing.
>
I tend to agree with this. I consider cocoon.xconf to be the location 
for "system" components, i.e. components that are available for _all_ 
components, be them related to a sitemap or not. But we may consider 
some sitemap components as system-level (see below).

>
>b) Having said a), if we decide for the xconf, it will *not* be possible
>   to define custom components in sub-sitemaps!
>
Definitely -1 for that. We *need* components defined locally for a 
sitemap. The treeprocessor even offers more features for that than the 
compiled engine, since the <map:component> is a regular component 
manager configuration where you can add *any* component definition (e.g. 
local jdbc datasources). However, I agree that component definition can 
be considered as not being the concern of the sitemap administrator 
(he/she manages the URI space, not the application configuration).

So what about allowing <map:components> to be written <map:components 
src="sitemap.xconf"/> ?

This way, each [sub-]sitemap (or cocoon block) comes with a sitemap.xmap 
and an optional sitemap.xconf defininig its local components, if any. 
The current behaviour should also be kept, for compatibility and for 
people which aren't confused by having components in the sitemap.

Now the question is do we define system-wide sitemap components in 
cocoon.xconf ? If yes, they should be IMO restricted to the very minimum 
of what we're likely to find in _every_ sitemap, i.e. wildcard and 
regexp matchers, file and xsp generators, xsl transformer, xml and html 
serializers.

Note also that some system-level components may make use of some sitemap 
components. Namely, the xml serializer used in some source 
implementations, IIRC.

Thoughts ?

>
>c) If we opt for defining the components in the sitemap (as it is now)
>   we help the sitemap editor in writing the pipelines as he can simply
>   see which components are available.
>
>So, SoC or not, is the above really what we want? I think, no!
>
>Hmm, currently I'm thinking of voting -1 for defining the components
>in the xconf. This would create a deadlock. Very interesting
>and funny thing...
>
Does sitemap-local xconf remove the lock ?

Sylvain

-- 
Sylvain Wallez
  Anyware Technologies                  Apache Cocoon
  http://www.anyware-tech.com           mailto:sylvain@apache.org




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