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Subject: Re: [wsbpel] Groups - Reversible and Permeable Scopes v2.ppt uploaded
For me the primary issue is - should there be such a thing as permeable scopes in BPEL? How we express them is a secondary issue. My current leaning is against the inclusion of permeable scopes as a BPEL semantic. In other words, I believe we should mandate that all BPEL scopes are impermeable. The basis for my belief is that I am having trouble imagining the typical BPEL programmer being able to successfully deal with the difference between permeable and non-permeable scopes and the use cases I can imagine for permeable scopes don't appear compelling enough to justify the additional complexity. But I am very happy to be educated on that last point and so change my mind. Thanks, Yaron Satish Thatte wrote: > Yaron, > > It is not our intention to propose an explicit permeability attribute. > The last bullet in slide 5 may have misled you. (Im)permeability is > merely a part of the proposed semantic of reversible scopes. All > non-reversible scopes are implicitly permeable. And it is proposed that > serializable scopes are always reversible and hence impermeable. So > there is exactly one new attribute: reversible. Process designers will > have to decide whether a scope is reversible, unless of course they > actually attach a fault handler or compensation handler to it, in which > case the decision is made for them. I also have a preference for making > reversible="yes" the default. In that case all processes based on the > previous specification checkpoints will continue to have the semantics > they already do. > > Does that help? > > Satish > > -----Original Message----- > From: Yaron Y. Goland [mailto:ygoland@bea.com] > Sent: Thursday, March 18, 2004 1:54 PM > To: Satish Thatte > Cc: wsbpel@lists.oasis-open.org > Subject: Re: [wsbpel] Groups - Reversible and Permeable Scopes v2.ppt > uploaded > > Do you believe that the planning capabilities of the average programmer > are sophisticated enough to be able to distinguish when and where they > should use permeable versus reversible scopes? > > What use cases would we loose if we were to ban permeable scopes? > > I realize that my own thinking here is primitive and that it is unfair > to judge a proposal based on a slide deck so please consider my > questions as attempts to understand what is being proposed rather than > counter proposals. > > Thanks, > > Yaron > > satisht@microsoft.com wrote: > > > The document Reversible and Permeable Scopes v2.ppt has been submitted > by Satish > > Thatte (satisht@microsoft.com) to the OASIS Web Services Business > Process > > Execution Language TC document repository. > > > > Document Description: > > A proposal for solving issues 1 and 10, to be discussed at the next > face to face > > meeting in Walldorf. > > > > Download Document: > > > http://www.oasis-open.org/apps/org/workgroup/wsbpel/download.php/5972/Re > versible%20and%20Permeable%20Scopes%20v2.ppt > > > > > > View Document Details: > > > http://www.oasis-open.org/apps/org/workgroup/wsbpel/document.php?documen > t_id=5972 > > > > > > PLEASE NOTE: If the above links do not work for you, your email > application > > may be breaking the link into two pieces. You may be able to copy and > paste > > the entire link address into the address field of your web browser. > > > > > > > > To unsubscribe from this mailing list (and be removed from the roster > of the > > OASIS TC), go to > > > http://www.oasis-open.org/apps/org/workgroup/wsbpel/members/leave_workgr > oup.php. > > >
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