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From Reinhard Poetz <reinh...@apache.org>
Subject Re: [RT] Virtual Sitemap Components
Date Tue, 20 Jul 2004 05:21:09 GMT
Sylvain Wallez wrote:

> Reinhard Poetz wrote:
>
> <snip/>
>
>> I have the same understanding after reading the whole thread. Though 
>> I'm not sure if we have consensus on actions. Anyway, what will be 
>> the order of execution of actions? IIUC all actions within a pipeline 
>> are execute *before* the pipeline is executed, aren't they? Will this 
>> behaviour remain?
>> Another question: Is this order of execution of actions by design and 
>> if yes, what's the reason?
>
>
>
> Hey Reinhard, back to basics! Actions are in the "control structure" 
> category, alongside match and select. So they must be executed first, 
> just as matchers and selectors, as their result is used to decide 
> which components are included in the pipeline.
>
> The problems of actions is that they are more than control structures 
> as they are allowed to modify the system state, or perform a redirect, 
> which is not what the pipeline instructions (<map:generate> 
> <map:transform> etc) are doing today. That's why actions may be 
> forbidden in VPCs, except maybe for virtual readers.


Thank you Sylvain, I was wondering about this for a long time :-)

-- 
Reinhard


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