Ok. On Jan 13, 2012, at 8:49 AM, "Mattmann, Chris A (388J)" <[email protected]> wrote:
> Hi BW, > > On Jan 12, 2012, at 10:37 PM, BW wrote: > >> Ok Thx. I looked at that. I'm trying to get a 30k view of the whole picture. > > Ok, cool. > >> Isn't the query server component part of the substrate where the query >> handler gets attached? > > The QueryServer used to be a component that was seeded with a set of initial > Profile Server > endpoints, and then used those Profile Server end points to crawl a directed > graph of resources, > either automatically or interactively. As it consumed the resources, it > looked for: > > * Other Profile Servers -- to add more nodes to crawl (pointed at other > resources) > * Product Servers -- to download and package products from > * raw URLs -- to download and package products from So, it doesn't do this anymore? > >> Suppose, I want to deploy on 3 nodes; Query Handler to 1st for Query Server, >> Profile Handler to 2nd for Profile Server and Query Handler to 3rd for >> Product Server? > > If you want to deploy on 3 nodes, the typical model now: > > * web grid on each node, running on a Java app server (e.g., Tomcat) > * deploy Profile Handler on 2nd node web grid > * deploy Product Handler on 3rd node web grid > * (optionally) deploy handlers on 1st node > * contact 2nd and 3rd node prof/prod server directly via > Prof/Prod client or via cURL/wget, etc. > > Cheers, > Chris > >> >> On Jan 12, 2012, at 8:55 PM, "Mattmann, Chris A (388J)" >> <[email protected]> wrote: >> >>> Hi BW: >>> >>> In the current model, it's not done at all. The QueryServlet doesn't really >>> exist >>> since the advent of Web-Grid for the information integration components: >>> >>> http://oodt.apache.org/components/maven/grid/ >>> >>> Check out the slides from Sean Kelly on that site, that describes web grid. >>> Basically instead of the query server/servlet, we opted for a more REST >>> service oriented style where users consume profile and product server >>> end points via the Web Grid substrate. >>> >>> Does that help? >>> >>> Cheers, >>> Chris >>> >>> On Jan 12, 2012, at 8:50 PM, B W wrote: >>> >>>> Correct me if I'm wrong, an initial query is posted via a user agent >>>> browser to a servlet for the Query Service then: >>>> The messaging layer broadcasts the query to registered Profile Services >>>> that are running? >>>> Is this done via XML-RPC or posting to the servlets on the Profile Servers? >>>> >>>> >>>> I'm trying to figure out the whole thread. >>>> >>>> Thx. >>>> >>>> On Thu, Jan 12, 2012 at 8:22 PM, Mattmann, Chris A (388J) < >>>> [email protected]> wrote: >>>> >>>>> Hey Sean, >>>>> >>>>>> >>>>>> The ebXML model is one of the least egregious for a registry that I've >>>>> seen, and believe me, I've seen some nasty ones. But what makes JPL's >>>>> implementation so compelling is its JSON-esque and ReST-ful based API, >>>>> which, as far as I can tell, is totally original within the ebXML & OASIS >>>>> worlds. >>>>>> >>>>>> Normally I turn my nose up to heavy-handed models with entrenched APIs, >>>>> but the singular achievement of JPL is to make the ebXML model, which >>>>> conceptually isn't byzantine, actually usable, approachable, and >>>>> extendable. >>>>> >>>>> Super +1. >>>>> >>>>>> >>>>>> Is there any hope we can get JPL, Caltech, and NASA to give it up to >>>>> become part of OODT? Or its own Incubator project? >>>>> >>>>> I think Hardman is working on it, he can feel free to comment (or not) >>>>> here ^_^ >>>>> >>>>> Cheers, >>>>> Chris >>>>> >>>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>>> Chris Mattmann, Ph.D. >>>>> Senior Computer Scientist >>>>> NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA >>>>> Office: 171-266B, Mailstop: 171-246 >>>>> Email: [email protected] >>>>> WWW: http://sunset.usc.edu/~mattmann/ >>>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>>> Adjunct Assistant Professor, Computer Science Department >>>>> University of Southern California, Los Angeles, CA 90089 USA >>>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>>> >>>>> >>> >>> >>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>> Chris Mattmann, Ph.D. >>> Senior Computer Scientist >>> NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA >>> Office: 171-266B, Mailstop: 171-246 >>> Email: [email protected] >>> WWW: http://sunset.usc.edu/~mattmann/ >>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>> Adjunct Assistant Professor, Computer Science Department >>> University of Southern California, Los Angeles, CA 90089 USA >>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>> > > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Chris Mattmann, Ph.D. > Senior Computer Scientist > NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA > Office: 171-266B, Mailstop: 171-246 > Email: [email protected] > WWW: http://sunset.usc.edu/~mattmann/ > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Adjunct Assistant Professor, Computer Science Department > University of Southern California, Los Angeles, CA 90089 USA > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >
