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 > 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 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
