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From Giacomo Pati <giac...@apache.org>
Subject Re: [RT] Sitemap Listeners
Date Fri, 15 Apr 2005 18:37:19 GMT
On Fri, Apr 15, 2005 at 04:07:15PM +0200, Carsten Ziegeler wrote:
> I while ago we briefly discussed the idea of sitemap listeners that are
> invoked each time a sitemap is entered/left.
> 
> Our 2.2 code base contains a first implementation which can be seen as a
> very simple base for this feature. I think it's time now to discuss this
> further.
> 
> 1. Configuration
> 
> You can define listeners in the map:components section in a sitemap with:
> <map:listeners>
>   <map:listener role="Some Avalon role"/>
>   <map:listener class="A class"/>
> </map:listeners>
> 
> So you can either use a configured component or define a class and then
> an instance of this class is created (using the per sitemap
> classloader). In both cases the listener must be thread safe.
> 
> 2. Listeners and Events
> 
> Currently there are two listener types defined (in o.a.c.sitemap):
> 
> public interface EnterSitemapEventListener extends SitemapListener {
> 
>     void enteredSitemap(EnterSitemapEvent event);
> }
> public interface LeaveSitemapEventListener extends SitemapListener {
> 
>     void leftSitemap(LeaveSitemapEvent event);
> }

Why two separate interfaces?

Ciao
 
-- 
Giacomo Pati
Otego AG, Switzerland - http://www.otego.com
Orixo, the XML business alliance - http://www.orixo.com

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