wsbpel-reqts message

Subject: Issue - 27 - Setting link status in case of transition condition

From: ws-bpel issues list editor<peter.furniss@choreology.com>
To: wsbpel-reqts@lists.oasis-open.org
Date: Thu, 26 Jun 2003 18:38:27 +0100

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Issue - 27 - Setting link status in case of transition condition

Submitter: Assaf Arkin
Date submitted: 25 June 2003
Categories: clarification/operational semantic
Document: specification
Description:

Consider the following example:

<scope name="X"> <source link="A" transition=".."/> <source link="B"/> <compensationHandler/> .. do something </scope>

The scope activity executes to completion. Some activities were performed that have side-effects and so a compensation handler was defined and got installed. The activity can now be compensated. The status of link B would be set to true, the status of link A would be set based on the value of the transition condition. The transition condition happens to generate a fault. What happens next?

A fault handler would be invoked in the enclosing scope and would compensate for the work done by the scope activity. If the targets of link A and link B are enclosed in the same scope then neither one would execute. But what if the target of link A and link B is in some other scope. What would be the status of the links? If the status of link A is true that may conflict with the intent of the transition condition that may set it to false realizing that some pre-condition has not been met. If the status of link A is false that would consist with the activity being compensated immediately after completion. But the case must be made that the status of link B should also be set to false for consistency.

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