Hi First of may I say that I have been extremely impressed with the support on this forum. Simon, you are correct with the overview of the pattern except that the number of progress messages returned would be configurable. I am analysing the use of SCA in the ground segment of a space system. This is to be based on standards being developed. These standards require that certain message exchange patterns between a consumer and producer be provided. We will not be using web services so we would extend the transport bindings to either use CORBA or TCP/IP communication. The information model for communication is defined in the standard, we will just provide an encoding as the standard does not cover this. I have assumed that we can do this within the binding mechanism? With regard to BPEL we would not be interested in this at least for the moment. Main languages used are Java and C++. Both the consumer and provider at least for the time being will all be on the ground although they will like be distributed depends on the deployment. I guess what I am trying to understand is if I can use conversations to do this and if so, can you extend the conversation dynamically, as the number of our responses are variable, or do we need to develop a new service that handles this and then our core services use this. For instance we could do this by callbacks over the transport. But I want to get a feel for the extent of work we will need to do or if we just start from scratch. The MEP is one of 5 but this is the most complicated to provide hence my interest in this. Regards, Steve.
________________________________ From: Simon Laws [mailto:[EMAIL PROTECTED] Sent: Thu 13/03/2008 23:00 To: tuscany-user@ws.apache.org Subject: Re: Conversation and Message exchange patterns Yep, I believe it's right that Tuscany's implementation.bpel doesn't support callback, conversation etc. Can you say a litte more about what you mean about achieving the same using pure web services. If the services are written outside of the context of the Tuscany runtime them it is up the the service implementation to provide some callback and/or conversation protocol. If you mean is it possible to callback to a web service that is outside the tuscany runtime environment then that may work by explicitly setting the callback binding details but I'd have to test if. If nothing else you could specify a remote reference with a web services binding and use that as the callback target from within you service code. Sorry this is not a very precise answer. Maybe you could say a little more about your scenario Regards Simon On Thu, Mar 13, 2008 at 7:59 PM, Jean-Jacques Dubray <[EMAIL PROTECTED]> wrote: > Simon: > > my understanding is that it cannot be done with BPEL yet. > > Do you know if this can be achieved with pure Web Services (regardless of > whether they have been written in Java or not). > > JJ- > > On Thu, Mar 13, 2008 at 12:05 PM, Simon Laws <[EMAIL PROTECTED]> > wrote: > > > On Wed, Mar 12, 2008 at 3:35 PM, James, Steven <[EMAIL PROTECTED]> > > wrote: > > > > > We are investigating using SCA and are trying to understand if SCA > could > > > support complex Message exchange patterns (MEP's). What I mean by MEP > is > > > similar to those defined by WSDL 2.0 i.e. In-out Out-Only etc. > > > > > > I have been looking at the conversation capabilities of SCA and am > > > starting to think we could create our message patterns using this > > mechanism. > > > The types of pattern we are intrested in are for instance the ability > to > > > make a request and then get a configurable number of progress updates. > > Is > > > this possible using conversations? in addition is there any language > or > > > transport constraints to this? > > > > > > Best regards, > > > > > > Steve. > > > > > > > > > This e-mail and any attachment is for authorised use by the intended > > > recipient(s) only. It may contain proprietary material, confidential > > > information and/or be subject to legal privilege. It should not be > > copied, > > > disclosed to, retained or used by, any other party. If you are not an > > > intended recipient then please promptly delete this e-mail and any > > > attachment and all copies and inform the sender. Thank you. > > > > > > > > > > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > Hi Steve > > > > Welcome to Tuscany! > > > > Let me make sure I have your scenario correct then we can work up some > > sample interface together for how to make it work. So IIUC you have > > service > > A and service B and they call each other as follows: > > > > A calls B.doSomething asynchronously > > B calls A.progressReport > > B calls A.progressReport > > B calls A.progressReport > > > > The progress reports stops after a set number have been delivered? > > > > On the "language or transport constraints to this" point. The general > > support for conversations, callbacks etc is good for Java over the SCA > and > > WebServices bindings. I don't think other languages/transports have been > > addressed but I'm sure someone will jump in and correct me. > > > > Regards > > > > Simon > > > > > > -- > Jean-Jacques Dubray > 425-445-4467 > This e-mail and any attachment is for authorised use by the intended recipient(s) only. It may contain proprietary material, confidential information and/or be subject to legal privilege. It should not be copied, disclosed to, retained or used by, any other party. If you are not an intended recipient then please promptly delete this e-mail and any attachment and all copies and inform the sender. Thank you.
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