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From Simon Laws <simonsl...@googlemail.com>
Subject Re: Fast Java runtime bootstrap for mass virtual hosting
Date Thu, 03 Mar 2011 16:11:35 GMT
On Thu, Mar 3, 2011 at 3:59 PM, Jean-Sebastien Delfino
<jsdelfino@apache.org> wrote:
> Hi all,
> Recently I've been experimenting with ways to speed up the bootstrap
> of the Java runtime to support mass virtual hosting.
> I thought I'd share my findings here.
> Here's a summary of the use case:
> - you're hosting hundreds or thousands of apps, published under
> corresponding virtual hosts
> - you can't pre-declare, pre-load and pre-start them all
> - you need to activate an app when you get a request for it
> - and clean up its resources after the request has been processed.
> and the mechanisms I experimented with:
> - bootstrap the part of the runtime that's independent of any app, once
> - load the app composite on the first request for it
> - cache the app composite model
> - activate/deactivate its components + start/stop them for each request
> - do that for each HTTP request handled by our ServletHost
> The good news is that supporting that only involves a few little
> tweaks to our usual runtime node startup sequence.
> I'm planning to share that experiment with the community for review there:
> http://svn.apache.org/repos/asf/tuscany/sandbox/sebastien/java/vhost/
> and hoping to help generate ideas to better address this type of use case.
> I'm really busy at work this week but will try to commit this code
> when I find some time over the weekend.
> --
> Jean-Sebastien

Hi Sebastien

Sounds interesting. Are you saying that the changes are already in the
branch in your sandbox or that your sandbox branch is waiting to have
the changes committed to it? Was wondering whether to go look yet?



Apache Tuscany committer: tuscany.apache.org
Co-author of a book about Tuscany and SCA: tuscanyinaction.com

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