Re: [wsbpel] Q: Location of rethrow

[Yuzo Fujishima <fujishima@bc.jp.nec.com>]

Dieter,

Thank you for your response.

After reading your message, I've reached the following
interpretation idea:

   A <rethrow> throws the fault from the location of the
   corresponding fault handler (<catch> or <catchAll>),
   not from the location of <rethrow> itself.

   A <rethrow> corresponds to a <catch> or <catchAll>
   that enclose the <rethrow> without any intervening
   <catch> or <catchAll>.

If we interpret this way, then in the example below
the rethrown fault will not be caught by FH2. We
don't need any additional constraints on the placement
of <rethrow>.

How do you like this?

Yuzo Fujishima
NEC Corporation


Dieter Koenig1 wrote:

> 
> 
> 
> Yuzo, from my point of view, the answer to your questions shoud be as
> follows:
> 
> 
>>Q1: Is it legal to place the <rethrow> there?
> 
> So far, the answer is yes. W.r.t. Q2, we should add a constraint that
> disallows nesting rethrow in a scope local to FH1.
> 
> 
>>Q2: Assuming the answer to Q1 is yes, will FH2 catch the rethrown fault?
> 
> It should not. If FH2 rethrows the fault as well, we reenter FH1 and have a
> loop. With the constraint described in Q1, we would avoid this situation.
> 
> Kind Regards
> DK
> 
> Yuzo Fujishima <fujishima@bc.jp.nec.com> wrote on 27.08.2004 13:18:26:
> 
> 
>>Hi,
>>
>>I have a question regarding where we can place <rethrow>.
>>
>>The current specification says:
>>  <rethrow> activity can be used ONLY within a fault handler
>>  (i.e. <catch> and <catchAll> elements).
>>
>>Therefore, I think the following is legal:
>>  <faulthandlers>
>>    <catch name="FH1" faultName="x:foo">
>>      <sequence>
>>        ...
>>        <rethrow/>
>>      </sequence>
>>    </catch>
>>  </faultHandlers>
>>
>>But I am not sure about the following:
>>
>>  <faulthandlers>
>>    <catch name="FH1" faultName="x:foo">
>>      <sequence>
>>        ...
>>        <scope>
>>          <faulthandlers>
>>            <catch name="FH2" faultName="x:foo">
>>            ...
>>            </catch>
>>          </faultHandlers>
>>          <rethrow/>
>>        </scope>
>>      </sequence>
>>    </catch>
>>  </faultHandlers>
>>
>>Q1: Is it legal to place the <rethrow> there?
>>
>>Q2: Assuming the answer to Q1 is yes,
>>    will FH2 catch the rethrown fault?
>>
>>Yuzo Fujishima
>>NEC Corporation
>>
>>
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> 
> 
> 
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