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Subject: RE: [wsbpel] Groups - Reversible and Permeable Scopes v2.ppt uploaded


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? 


-----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

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.



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
> 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: 
> View Document Details:
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