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From giacomo <giac...@apache.org>
Subject Re: AW: [C2]: Problems with content aggregation and redirects
Date Mon, 25 Jun 2001 20:26:48 GMT
On Mon, 25 Jun 2001, Carsten Ziegeler wrote:

> > Giacomo Pati wrote:
> >
> > Quoting Carsten Ziegeler <cziegeler@sundn.de>:
> > > > Giacomo Pati wrote:
> > > >
> > > > On Fri, 22 Jun 2001, Carsten Ziegeler wrote:
> > > >
> > > > > > Michael Hartle wrote:
> > > > > >
> > > > > > Carsten Ziegeler wrote:
> > > > > >
> > > > > > > The CA example doesn't work as the aggregated part
> > > > > > (moreover/moreover.xml)
> > > > > > > has no EventPipeline (it's a redirect).
> > > > > > >
> > > > > > > I think we should fix this. The easiest solution for this
would
> > > > > > be to make
> > > > > > > the cocoon: url work and use them from inside the
> > > > > > ContentAggregator as well.
> > > > > > >
> > > > > > > What do you think?
> > > > > >
> > > > > > Will the cocoon: protocol then later be used as the only way
for
> > > to
> > > > > > specifiy the source of an aggregation
> > > > > > element ? If it is not so, then there would be two ways how
> > > > aggregations
> > > > > > can be used (with or without the
> > > > > > cocoon: protocol) and this counter-intuitive issue regarding
> > > sitemap
> > > > > > redirects that are not being resolved
> > > > > > would remain.
> > > > > >
> > > > > Yes, I personally would suggest that it is required to use the
> > > cocoon:
> > > > > protocol. But I think we have to vote on this.
> > > >
> > > > The sitemap aggregation was made exactly for aggregating cocoon
> > > > pipelines because it aggregates XMLProducers not byte streams. I think
> > > > aggregating other stuff is better suited by the xinclude transformer.
> > > >
> > > Ok, the CA was made to aggregate pipelines, but what about aggregation
> > > different "xml sources" which could either be pipelines but also
> > > completly
> > > different urls.
> > > When (not if!) we have the cocoon: url the CA can do both of the above
> > > without any change. And the great advantage over the xinclude
> > > transformer
> > > is caching as CA is cacheable and the xinclude not.
> >
> > The cocoon: protocol should server a ContentHandler but all other
> > protocols
> > represent byte streams. If you have an idea how the CA can
> > distinguish them then
> > go for it. Also if the cocoon: protocol serves a ContentHndler
> > the CA isn't
> > cachable as well (only its parts are).
> >
> Yes, currently I see a narrow path to distinguish, but first I want to
> implement something to see if I am right or not (this will take some
> days).
> I thought that when all parts are cacheable the CA is also cacheable.
> Correct? And I hope to make the parts with cocoon: url also to be
> cacheable (and this is currently this is currently only a very thin
> line I am walking on, but we'll see).

How can a URL of a cocoon: protocol states its cachability?

Giacomo

>
> Carsten
>
> > Giacomo
> >
> > >
> > > Carsten
> > >
> > > > Giacomo
> > > >
> > > > >
> > > > > Carsten
> > > > > > Michael
> > > > > >
> > > > > >
> > > > > >
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> > > > >
> > > > >
> > > >
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