Re: [wsbpel] Issue - 96 - Opaque Correlation Sets

[Frank Leymann <LEY1@de.ibm.com>]

Yaron,

there are scenarios in which the author of a process doesn't know whether
partners of the process want to use opaque or transparent correlation sets.
I.e. we should consider to support the specification of both kinds of
correlation mechanism for a given activity, and then would have to define
"overwriting rules" in case both kinds of correlation tokens do appear in a
given interaction.

Regards,
Frank







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Subject:    [wsbpel] Issue - 96 - Opaque Correlation Sets


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Issue - 96 - Opaque Correlation Sets


Status: open
Date added: 3 Feb 2004
Submitter: Yaron Goland
Date submitted: 03 February 2004
Document: Spec - Main
Description: When a BPEL programmer wants to use correlation they define a
correlation set which consists of a series of properties. The BPEL
programmer then makes sure that when initializing a correlation set the
message being used for initialization has the proper values, IDs, etc.,
inside of it. This is a powerful generic feature that allows BPEL to work
with a wide variety of correlation mechanisms. However, protocols are now
being introduced to explicitly manage message correlation, for example,
ws-addressing. One of the benefits of such protocols is that they free the
programmer from having to worry about the details of correlation set
definition and value creation. Therefore it would be extremely useful if
BPEL, in addition to its existing correlation set mechanism, introduced the
ability to define an 'opaque' correlation set. That is, a correlation set
whose definition and associated message values are managed by the BPEL
engine. An opaque correlation set would only define what protocol it is
based on and leave the other details to the BPEL engine. E.g.
<correlationSet name="myCor" algorithm="
http://somestandards.org/astandard/mechanism"/>
Changes: 3 Feb 2004 - new issue



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