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From Reinhard Poetz <>
Subject Re: [RT] Micro kernel based Cocoon
Date Mon, 23 May 2005 11:56:33 GMT
Daniel Fagerstrom wrote:
> Carsten Ziegeler wrote:
>> Ok, so far so good - now, what do I have to do if I'm developing my own
>> application and want to use let's say the cron block: I want to add my
>> own scheduled task? Currently I have to know a little bit about Avalon:
>> using the service manager to lookup the component. Or to put it in other
>> words, I have to know what the service locator concept is. And that's
>> all. How does this look like with OSGi?
>> And in this context, if I'm developing an own application, does this
>> have to be an OSGi bundle as well?
> Read the subsections "The main sitemap" and "The Cocoon service" in the 
> first post in this thread 
> The application need to be a bundle, but that only means that there need 
> to be a manifest file in it. Also the dependency information that we now 
> handle in a rather implicit compile time way in, will 
> need to be declared within the "sitemap bundle". Everything else will be 
> as before, you use the service manager for lookup as always.

I had a look at OSGi manifest files and I think we can generate out of our block 
descriptors (block.xml) with the result that somebody who is writing a Cocoon 
block doesn't even has to know that Cocoon is based on OSGi.

BTW, for all German speakers who have access to German magazins: Currently OSGi 
seems to be a hot topic: In the current issues of "Eclipse Magazin" (05/03) and 
"Java Spektrum" (05/02) there are articles about OSGi. The Eclipse Magazin 
describes OSGi in Eclipse (of course) and the Java Spektrum article shows how to 
use Oscar.

Reinhard Pötz           Independent Consultant, Trainer & (IT)-Coach 

{Software Engineering, Open Source, Web Applications, Apache Cocoon}


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