Issue - 69 - When to clear link status

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Issue - 69 - When to clear link status

Status: open
Date added: 27 Sep 2003
Submitter: Yuzo Fujishima
Date submitted: 27 September 2003
Document: BPEL 1.1 Specification
Description:

Link target and/or source activities can be run more than once if the process contains a loop (i.e. while acitivity).

When to clear the link status in such cases is not defined in the current specification.
Submitter's Proposal: Possible resolutions are to specify that the link status is cleared:

1. Only at the very beginning of the process / event handler thread; OR
2. Every time the scope that directly encloses the link owner flow activity starts; OR
3. Every time the link owner flow activity starts.

I would propose C. In the following example, A1 and A2 are cleared every time flow A is started and B1 and B2 are cleared every time flow B is started.

<while ...>
  <flow name="base">
    <flow name="A">
      <links>
        <link name="A1"/>
        <link name="A2"/>
      </links>


      ... activities ...
    </flow>
    <while ...>
      <flow name="B">
        <links>
          <link name="B1"/>
          <link name="B2"/>
        </links>


        ... activities ...
      </flow>
    </while>
  </flow>
</while>

Changes: 27 Sep 2003 - new issue

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