Hey there, Well, I was confused by the line: "Well, it tells us that HTTP is a higher level "thing" than RMI, IIOP," How do you define the "thing"? IMHO, HTTP is only a transport. Hence in the grand design of Service Oriented Architecture (of which Web Services may be a means), HTTP plays a very insignificant role.
CORBA however, was a separate paradigm in computing, IMHO. I guess it was mostly the open sources answer to D-COM. However, I am unclear about the causes of its failure. I Will need to explore that avenue. Cheers G --- In [email protected], "Mark Baker" <[EMAIL PROTECTED]> wrote: > > On 6/28/06, Gregg Wonderly <[EMAIL PROTECTED]> wrote: > > Mark Baker wrote: > > > On 6/28/06, Gregg Wonderly <[EMAIL PROTECTED]> wrote: > > > > > >>Humm, but it has been said here that HTTP is an application layer protocol. The > > >>semantics of INVOKE are well defined. A remote reference is indicated in the > > >>payload which is the service as a URI is in HTTP. The parameters of the method > > >>call are arbitrary, but particular to the service, just like the payload of POST > > >>or PUT. The INVOKE always returns a reply as HTTP does. Help me understand > > >>what is not uniform about that? > > > > > > You have to INVOKE an operation. That operation is the application > > > layer semantic. > > > > Right, and with HTTP, the message layer semantics that transpire based on you > > invoking a HTTP operation are at the same level as the eventual method > > invocation on the remote end of an RMI INVOKE operation. > > That seems right, though it's possible that we might disagree about > the meaning of "message layer semantics" and "eventual method > invocation". > > In both cases, remote, application layer operations are being invoked > over a network. > > > There are no real > > differentiating factors other than nomenclature here are there? > > Well, it tells us that HTTP is a higher level "thing" than RMI, IIOP, > or how SOAP is commonly used, because it provides the operations being > invoked while the others do not. Considering how the entire Web > services architecture is premised on it being a lower level thing, I > think that's significant. > > Mark. > ------------------------ Yahoo! Groups Sponsor --------------------~--> Great things are happening at Yahoo! Groups. See the new email design. http://us.click.yahoo.com/TISQkA/hOaOAA/yQLSAA/NhFolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/service-orientated-architecture/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
