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From Brett Porter <br...@apache.org>
Subject Re: Progress on MRM-463 - Metadata support
Date Tue, 04 Sep 2007 08:48:57 GMT
This seems to make sense (though the concurrency issues are  
concerning, especially considering difficulty to test)

- Brett

On 31/08/2007, at 2:56 AM, Joakim Erdfelt wrote:

> In the past 2 weeks I've made tremendous progress on the Metadata  
> issues within Archiva.
>
> So far in trunk, the following changes have been made.
>
> archiva-repository-layer:
>  [NEW] MetadataTools component that is responsible for the merging  
> and updating of inplace maven-metadata.xml files.
>
> archiva-proxy:
>  [Update] DefaultProxyConnector now will ...
>   1) download requested maven-metadata.xml from *all* remote  
> repositories.
>      NOTE: must pass the pre-download policies first.
>   2) Save the downloaded maven-metadata.xml next to the maven- 
> metadata.xml that exists in the managed repository using a filename  
> format of maven-metadata-${proxyId}.xml (similar to how the maven 2  
> local repository works now).
>   3) After all of the downloads from all proxied repositories  
> complete, a MetadataTools.updateMetadata() call is issued to  
> perform an update on that maven-metadata.xml file.
>   4) Upon a completion of the MetadataTools.updateMetadata() with  
> no error, the maven-metadata.xml file in the managed repository is  
> returned to the requesting client.
>
> What's left.
>
> archiva-core-consumers:
>  [NEW] MetadataUpdaterConsumer - which runs as part of the  
> repository scanning process and updates all of the in-place maven- 
> metadata.xml files.
>
> Alsø Alsø Wik: I'm only mildly worried about Concurrency issues  
> with this solution, as most calls for the maven-metadata.xml will  
> be caught by the pre-download policies, and updates to those files  
> will occur only on occasion.
>
> Feel free to rip my logic to shreds and tell me what an idiot I am.  
> (it's really the only way I'll learn) :-)
>
> - Joakim

--
Brett Porter - brett@apache.org
Blog: http://www.devzuz.org/blogs/bporter/

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