RE: [wsbpel] Issue - 120 - What are the semantics when an initial <receive> has no correlation set?

["Ugo Corda" <UCorda@SeeBeyond.com>]

Title: Message

I think the term "semantics" was used here primarily to refer to the expected behavior in case a second message is sent to the same <receive> at the time an instance is already active (see Issue 118 discussions). Should the second message be understood as creating a new instance, or should it be seen as a message sent to a singleton instance (and therefore dropped since the corresponding <receive> is not active at that time)? As I remember from the issue 118 discussions, use cases can be made for both interpretations.

 

Ugo

-----Original Message-----
From: Ron Ten-Hove [mailto:Ronald.Ten-Hove@Sun.COM]
Sent: Thursday, August 12, 2004 11:16 AM
To: wsbpel@lists.oasis-open.org
Subject: Re: [wsbpel] Issue - 120 - What are the semantics when an initial <receive> has no correlation set?

It seems to me that we can't actually read too much into the fact that an initiating <receive> activity doesn't initiate a correlation set at the same time. Two possibilities come to mind:

• The process is actually very simple, and doesn't need correlation (ie, it has no other <receive> activities).
• The process initiates the correlation set in a later <invoke> activity.

So it seems that it would be inappropriate to infer any special semantics to the <receive> in question.

-Ron

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Issue - 120 - What are the semantics when an initial <receive> has no correlation set?

Status: open
Categories: Correlation
Date added: 19 Apr 2004
Submitter: Danny van der Rijn
Date submitted: 19 April 2004
Description: when an initial <receive> has no correlation set should the instance be singleton, or be allowed to have multiple instances outstanding in parallel?
Changes: 19 Apr 2004 - new issue

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