Re: [equinox-dev] P2 artifact repositories and caching

[John Arthorne <John_Arthorne@xxxxxxxxxx>]

Hi Thomas,

That code in the installer plug-in was
never intended as API, and I don't recommend it as something for you to
be calling. I suggest just looking at the code in the installer as an example
of how to setup and invoke the IDirector API. IDirector is really the API
you want to be calling. The rest of the code in the installer is just doing
various setup and cleanup that is likely not easily generalized. You can
also see the director application for a slightly simpler usage of the director
API (the Application class in the org.eclipse.equinox.p2.director bundle).

On the other hand, the code in the installer
that touches SWT is quite minimal and has been carefully abstracted out.
The installer should really only have an optional dependency on SWT, since
it can fall back to a headless install if SWT is not there.

John

Thomas Hallgren <thomas@xxxxxxx>
Sent by: equinox-dev-bounces@xxxxxxxxxxx

03/17/2008 06:45 AM

Please respond to
Equinox development mailing list <equinox-dev@xxxxxxxxxxx>

To	Equinox development mailing list <equinox-dev@xxxxxxxxxxx>
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Subject	[equinox-dev] P2 artifact repositories and caching

In Buckminster, we need a global artifact cache for
downloaded things. 
What I envision is a cache that can use different strategies to decide
whether or not the local content is up-to-date. One such strategy could
be to compare with a remote digest of some sort (md5 for instance). 
Another could be to verify the consistency of a local compressed archive
and be satisfied with the exact same size (not 100% safe of course, but
in some cases its sufficient).

I found the BlobStore in p2 and that will help some. I was under the 
impression that a "download manager" was under development that
would 
address caching issues like the ones I mention. Are there more things 
under development that are not covered by the current team project set?

Regards,
Thomas Hallgren

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