On Wed, Apr 30, 2008 at 1:38 PM, Simon Laws <[EMAIL PROTECTED]>
wrote:
>
>
> On Wed, Apr 30, 2008 at 1:25 PM, ant elder <[EMAIL PROTECTED]> wrote:
>
> >
> >
> > On Wed, Apr 30, 2008 at 1:18 PM, Simon Laws <[EMAIL PROTECTED]>
> > wrote:
> >
> > > snip....
> > >
> > > >
> > > > Cool thats really helpful. Ok so if we can have a Tomcat TuscanyHost
> > > > (i.e.
> > > > an extension of org.apache.catalina.core.StandardHost not related to
> > > > the
> > > > Tuscany host stuff) that will get its addChild method called for
> > > > each
> > > > webapp and we can get a File to the root of the webbapp so call
> > > > nodeFactory.createSCANode with that and treat each webapp as a
> > > > seperate
> > > > contribution which seems reasonable. That would give us a node per
> > > > webapp
> > > > which i'm not sure is good or bad till theres some answers to the
> > > > "what is a
> > > > node" question.
> > >
> > >
> > > sounds ok to me.
> > >
> > >
> > > >
> > > >
> > > > How do nodes talk to each other or become part of a bigger domain?
> > > > Theres
> > > > nothing in SCANode2Factory.newInstance().createSCANode or node.start
> > > > that
> > > > mentions anything about any domain?
> > > >
> > > > ...ant
> > > >
> > >
> > > They don't talk to each other, other other than at the application
> > > level. If you want to have a node read it's configuration from the domain
> > > you can use the
> > > following factory method.
> > >
> > > public abstract SCANode2 createSCANode(String configurationURI);
> > >
> > > and provide the URI of the configuration that you want it to read.
> > > e.g.
> > >
> > > node = factory.createSCANode("http://localhost:9990/node-image/NodeA
> > > ");
> > >
> > > This URL is provided by the domain and is tailored specifically to
> > > provide just the right configuration (the list of composite and
> > > contribution
> > > URLs) for the node in question. NodeA in this case.
> > >
> > > Simon
> > >
> > >
> > Now I'm lost again :)
> >
> > Stepping back a bit, what and how is the domain involved in this? What
> > does it mean to "have a node read it's configuration from the domain"?
> >
> > ...ant
> >
> >
> Apologies. I'm probably confusing you here as I don't have a clear
> picture. Two scenarios.
>
> 1 - the one we know and love where the webapp is self contained and runs a
> node (SCADomain in our current host-webapp) to run the composite that it
> contains.
>
> 2 - the distributed domain scenario. The last time we approached this we
> had the node contacting the domain for endpoint information for those
> targets that could not be resolved locally. This gave us start up problems.
> This is still the role of the new domain but the way that the node gets this
> information is different now. This is where I too am suggesting that the use
> case is not clear.
>
> So if we agree that there are two slightly different scenarios we can
> investigate them further.
>
> Simon
>
Agreed, here we are talking about that second one right? Or at least
something different than the first anyway. Something like what we had
described here - http://apache.markmail.org/message/ttssxoruzpndkado
So in the (2) above how does the "domain" get configured? In a previous
email you said "the webapp will have been contributed to the domain for
processing" is there any code i can look at showing that type of thing
happening? And then how do you create a node from a configured domain?
...ant
