[wsbpel] Issue - R8 - Proposal For Vote

[Alex Yiu <alex.yiu@oracle.com>]

Hi all,

When passing the paragraph for people to review, some people requested some examples to illustrate the paragraph intention.  Here is the same paragraph updated with addition of examples.

The follow changes applies to in Bullet 4 of Section12.7: (changes are highlighted in GREEN)
============================

The compensation handler for an isolated scope does not share the isolation domain of the associated scope. The isolation domain ends and the scope snapshot is created when the normal processing of that isolated scope completes. Afterwards, the compensation handler is installed. The compensation handler actually shares the isolation domain of the invoking activities (i.e. <compensate> / <compensateScope>) or implicit invoking FCT-handler of the immediately enclosing scope, when the invoker of the compensation handler is already within an isolation domain. (See scope "FH_A" in the following examples.) If the invoker of the compensation handler is not within an isolation domain, the execution of the compensation handler for an isolated associated scope will be implicitly isolated. Such an implicit isolation domain ends when the execution of such a compensation handler ends. (See scope "FH_P" and scope "Q".)

-----------------------------
 <scope name="A">
       <faultHandler>
             <catchAll>
                   <scope name="FH_A" isolated="true">
                         <sequence>
                             ...
                            <compensate />
                             ...
                         </sequence>
                   </scope>
          </catchAll>
    </faultHandler>
    <sequence>
          ...
          <scope name="B">
              <compensateHandler>
                  <sequence name="undoB_Seq">
                     ...
                  </sequence>
              <compensateHandler>
              <sequence name=doB_Seq">
              </sequence>
          </scope>
          ...
    </sequence>
</scope>
-----------------------------

In the above example, the <compensate/> activity will invoke the compensationHandler of scope "B" (which performs sequence "undoB_seq") in the isolation domain of scope "FH_A".

-----------------------------
 <scope name="P">
       <faultHandler>
             <catchAll>
                   <scope name="FH_P">
                         <sequence>
                             ...
                            <compensate />
                             ...
                         </sequence>
                   </scope>
          </catchAll>
    </faultHandler>
    <sequence>
          ...
          <scope name="Q" isolated="true">
              <compensateHandler>
                  <sequence name="undoQ_Seq">
                     ...
                  </sequence>
              <compensateHandler>
              <sequence name=doQ_Seq">
                  ...
              </sequence>
          </scope>
          ...
    </sequence>
</scope>
-----------------------------

In the above example, the <compensate/> activity is NOT already within an isolation domain (say assuming scope "P" is the root scope of the process).  The execution of the CH of scope-Q will be isolated automatically. This isolation domain ends when the execution of the CH of scope "Q" ends.

============================

This change would qualify a substantive change.


Thanks!


Regards,
Alex Yiu



Mark Ford wrote:

+1

 

---

From: Alex Yiu [mailto:alex.yiu@oracle.com]
Sent: Wednesday, October 04, 2006 12:32 PM
To: wsbpel@lists.oasis-open.org
Cc: Alex Yiu
Subject: Re: [wsbpel] Issue - R8 - Proposal Draft

 

Hi all,

Here is the proposal draft for Issue R8: "Create separate isolation domain for isolated scope's compensation handler":

The follow changes applies to in Bullet 4 of Section12.7: (changes are highlighted in GREEN)
--------------------------

The compensation handler for an isolated scope does not share the isolation domain of the associated scope. The isolation domain ends and the scope snapshot is created when the normal processing of that isolated scope completes. Afterwards, the compensation handler is installed. The compensation handler actually shares the isolation domain of the invoking activities (i.e. <compensate> / <compensateScope>) or implicit invoking FCT-handler of the immediately enclosing scope, when the invoker of the compensation handler is already within an isolation domain. If the invoker of the compensation handler is not within an isolation domain, the execution of the compensation handler for an isolated associated scope will be implicitly isolated. Such an implicit isolation domain ends when the execution of such a compensation handler ends.

--------------------------



Thanks!


Regards,
Alex Yiu