Let's take a standard purchase order scenario. If I send a PO message as the payload, using ebXML-TRP, I can receive tne ACK/NAK on the same socket. A subsequent message within the time to perform as defined by my orchestration will have the POA payload response. I now have a request / response taking place across a time boundary (but still within my time to perform as defined by my BP).
The same thing applies if I have an EDI 850 PO using an EDIINT/AS2 transport. Additionally, HTTP is not the only protocol for moving payloads, TRPs also have specified support for SMTP such as EDIINT/AS1 or ebXML. SMTP cannot support synchronous business processes. All the production business process that I've seen so far, when using messaging, do it asynchronously. The one thing that I see is that our definitions of sync/async may be different. By sync, I see it more as defined by RPC mechanisms (ala RMI) and async as closer to messaging (ala JMS). francis --- Anne Thomas Manes <[EMAIL PROTECTED]> wrote: > Document style web services are not inherently > asynchronous. The synchronous > nature of a Web service is determined by the message > exchange pattern > described in the WSDL Operation. If the service is > defined as having an > input and output message, then it is a > request/response service (inherently > synchronous). If it is defined as having only an > input message, then it is a > one-way message (inherently asynchronous). > > Anne > > > -----Original Message----- > > From: Francis Ho -- Enterprise Architecture > [mailto:[EMAIL PROTECTED]] > > Sent: Tuesday, November 26, 2002 12:07 PM > > To: [EMAIL PROTECTED] > > Subject: RE: Document style web services > > > > > > Document style web services is inherently > asynchronous. Most of > > modern TRP/MS's > > such as EDIINT and RosettaNet (RNIF) use > document-style services. > > It was found > > to be more a bit more scalable and flexible in > dealing with > > legacy systems. > > This is especially true as many of the legacy > systems for order > > processing were > > batch oriented. > > > > francis > > > ===== -- The best thing about standards is that there are so many to choose from. __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com
