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Subject: Re: [wsbpel] Issue - 32 - Link Semantics in Event Handlers


Paco,

I, too, would vote for serialization for the same reason.

Yuzo

> Satish's and Edwin's interpretations match mine, and I've always believed
> that to be the original intent of all the authors (who should correct me if
> I am wrong). On the other hand, it is a fair question to ask whether we
> really need to allow multiple "copies" of an event handler to execute
> concurrently, as opposed to serializing the handling of each message
> received by the handler's onMessage activity. I would vote for
> serialization (of each execution of the same handler) if only because I
> don't have any scenario in mind that justifies the complexity of full
> concurrent execution of multiple copies of the same handler.
>
> Paco
>
>
>
>
>                       "Yuzo Fujishima"
>                       <fujishima@bc.jp.        To:       <wsbpel@lists.oasis-open.org>
>                       nec.com>                 cc:
>                                                Subject:  Re: [wsbpel] Issue - 32 - Link Semantics in Event Handlers
>                       07/04/2003 09:14
>                       PM
>
>
>
>
>
> Chunbo, Edwin
>
> According to a messge from Satish,
> http://lists.oasis-open.org/archives/wsbpel/200305/msg00131.html
> Edwin's view seems to be closer to the original authors' intention.
>
> The problem is that the specification itself allows at least two
> interpretations. I raised this issue to clarify which is the right one.
> After the discussion and the issue/requirementprocess mature,
> I probably propose a motion to pick one iterpretation.
>
> Yuzo
>
>
> Chunbo> Hi Yuzo,
> Chunbo>
> Chunbo> I think the link status is maintained at process instance level,
> not based
> Chunbo> on the thread level.  So A and B will be synced as far as they
> belong to the
> Chunbo> same process instance.
> Chunbo>
> Chunbo> -Chunbo
>
> Edwin> Yuzo,
> Edwin> Thank you for the example. It seems that in that specific case, each
> message
> Edwin> would create a new flow activity. So if you have 4  messages, you
> end up
> Edwin> with 4 instances of the flow activity (all running concurrently).
> Each flow
> Edwin> activity instance will have its own AtoB link. No?
> Edwin> Edwin
>
>
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