[p2-dev] Re: Question about artifact mirroring

[Thomas Hallgren <thomas@xxxxxxx>]

After some research I concluded that there was no shrink-wrapped way of 
doing this. So I created a new class:

public class CanonicalizeRequest extends MirrorRequest {
   private IArtifactDescriptor optimizedDescriptor;
   private IArtifactDescriptor canonicalDescriptor;

   public CanonicalizeRequest(IArtifactDescriptor optimizedDescriptor, 
IArtifactDescriptor canonicalDescriptor,
           IArtifactRepository targetRepository) {
       super(canonicalDescriptor.getArtifactKey(), targetRepository, 
null, null);
       this.optimizedDescriptor = optimizedDescriptor;
       this.canonicalDescriptor = canonicalDescriptor;
       setSourceRepository(targetRepository);
   }

   public void perform(IProgressMonitor monitor) {
       setResult(transfer(canonicalDescriptor, optimizedDescriptor, 
monitor));
   }
}

The mirroring is done by first using a RawMirrorRequest on the optimized 
descriptor, and then using CanonicalizeRequest to unpack (source and 
destination both pointing to the target repo). It seems to work well. 
Perhaps something to consider as a more generic feature for a mirroring 
application?

Regards,
Thomas Hallgren

Thomas Hallgren wrote:
> Let's assume that I have a remote repository that contains two 
> descriptors per artifact key, one optimized (pack200) and one 
> canonical. I want to mirror this repository to another that later also 
> will be deployed as a remote repository. How do I create a mirror that 
> contains both the optimized and the canonical files? Copying both from 
> a remote location using a RawMirrorRequest doesn't seem very optimal 
> and using a standard MirrorRequest will transfer the optimized version 
> but only store the canonical.
>
> What I would like the mirror request to do is:
> 1. Copy the optimized version over the wire.
> 2. Store the optimized version verbatim.
> 3. Recreate the canonical version from the optimized one and store 
> that too.
>
> Has this use-case been considered?
>
> Regards,
> Thomas Hallgren