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Subject: Issue - R29 - Partner link's initializePartnerRole attribute


This issue has been added to the wsbpel issue list with a status of "received". The status will be changed to "open" if a motion to open the issue is proposed and that motion is approved by the TC. A motion could also be proposed to close it without further consideration. Otherwise it will remain as "received".

The issues list is posted as a Technical Committee document to the OASIS WSBPEL TC pages on a regular basis. The current edition, as a TC document, is the most recent version of the document entitled in the "Issues" folder of the WSBPEL TC document list - the next posting as a TC document will include this issue. The list editor's working copy, which will normally include an issue when it is announced, is available at this constant URL.

Issue - R29 - Partner link's initializePartnerRole attribute

Status: received
Date added: 2 Nov 2006
Date submitted: 02 November 2006
Submitter: Mark Ford
Description: The purpose of the initializePartnerRole attribute on a partner link is to identify any partner links that the process will not initialize through an assign or some EPR scheme like the “reply-to” feature in WS-Addressing. These partner links must be initialized by some infrastructure logic specific to the processor. This logic is out of the scope of the specification but Section 6.2 suggests that it may take place during the deployment of the process.

There are a few problems with the attribute as it exists today.

  1. It is only used during deployment which is something that is not covered by the specification.
  2. There is no difference in the runtime behavior of the process if this attribute is “yes” or “no”. Why do we have an attribute that doesn’t affect runtime behavior?
  3. It may not be meaningful to process designers since the initialization of the partner role could occur through some mechanism outside of the WS-BPEL process like a reply-to in WS-Addressing. For example, if I am designing a process that receives data and then does an invoke on the same partner link, should I set the value of the initializePartnerRole attribute to “yes” or “no”. If I’m expecting the processing of the receive to update the partner link with a reply-to endpoint then I can set it to “no”. If I expect that the deployment packaging will provide me with an endpoint then I should set it to “yes”. It seems possible that I may not know the exact bindings at the time of the process creation.

It is also worth noting that the sample process in Section 15.3.2 defines two partner links without specifying the value of the initializePartnerRole attribute. It seems unlikely that WS-Addressing would be used to initialize the partner roles for these two partner links since they are only used for invokes.
Submitter's proposal:

Remove the attribute altogether from the partner link. This would affect about 3 paragraphs in Section 6.2 along with the appendix for default values and the schema.
Changes: 2 Nov 2006 - new issue


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