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From Javier Puerto <jpue...@gmail.com>
Subject Re: Handling errors retrieving a <map:part> for <map:aggregate>
Date Thu, 02 Jun 2016 14:12:25 GMT
2016-06-02 15:35 GMT+02:00 Christopher Schultz <chris@christopherschultz.net
>:

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> Javier,
>
> On 6/1/16 3:19 PM, Javier Puerto wrote:
> > I more used to version 2.2 but it should be the same. By you
> > description I think about creating a new pipeline with a matcher to
> > handle the external request with a specific error handler[1] that
> > contains a reader with an empty file.
> >
> > It should be something like:
> >
> > <map:pipeline type="caching">
> >
> > <map:match pattern="remote-handler/**"> <map:reader
> > src="http://remote-server/{1}"/> </map:match>
> >
> > <map:handle-errors> <map:reader src="empty.xml"/>
> > </map:handle-errors>
> >
> > </map:pipeline>
> >
> > Then you could substitute all your calls to external resources
> > that needs to produce an empty XML in case of error to call to the
> > new matcher. This way you can tune up the external pipeline for
> > caching if it's needed.
> >
> > I hope it helps.
>
> Thanks.
>
> How can I reference a matcher from a different pipeline? Do I need to
> address it any differently than I would if the matcher were in the
> same pipeline?
>

An example is better: http://wiki.apache.org/cocoon/CocoonProtocolExample


>
> Speaking of caching, I'd prefer for the "remote-handler" matcher to
> re-try pretty regularly. Do matchers cache at all under normal
> circumstances? I've never bothered attempting to configure any caching
> in Cocoon before.
>

You should configure the pipeline as "noncaching". There are more details
at:
https://cocoon.apache.org/2.1/userdocs/concepts/caching.html

Salu2.


>
> Thanks,
> - -chris
>
> > 2016-06-01 19:56 GMT+02:00 Christopher Schultz
> > <chris@christopherschultz.net
> > <mailto:chris@christopherschultz.net>>:
> >
> > All,
> >
> > Using Cocoon 2.1, I've got an aggregate generator like this:
> >
> > <map:match pattern="foo.html"> <map:aggregate element="bar">
> > <map:part src="/path/to/main.xml" /> <map:part
> > src="http://remote-server/baz.xml" /> </map:aggregate> ...
> > </map:match>
> >
> > There are times when "remote-server" is not available and I'd like
> > to basically include nothing at that location within the aggregate
> > document .
> >
> > Can I do that within the <map:aggregate> or <map:part> elements, or
> > is it better to wrap the <map:part> another <map:match> with an
> > error handled?
> >
> > Followup question: how can I configure an error handler to do
> > whatever I want? I only want this particular behavior to happen for
> > this particular <map:part> ... presumably, I'll want other behavior
> > in other situations.
> >
> > Thanks, -chris
> >
> > ---------------------------------------------------------------------
> >
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