RE: [wsbpel] Issue 36 - Multiple instances of event handler

["Satish Thatte" <satisht@microsoft.com>]

Edwin,
 
Can you share with us why you would prefer the explicit typing?
 
Satish

________________________________

From: Edwin Khodabakchian [mailto:edwink@collaxa.com]
Sent: Thu 9/25/2003 9:58 PM
To: 'Assaf Arkin'; Satish Thatte
Cc: wsbpel@lists.oasis-open.org
Subject: RE: [wsbpel] Issue 36 - Multiple instances of event handler



Assaf,

Thank you for the clarification. This solves the problem. It seems that the
group is preferring an implicit type definition inferred by the WSDL rather
than an explicit typing through messageType. It is not our preference but we
can live with that.

Also there is a small typo: the text below should refer to
onMessage/@variable.

Thank you,

Edwin



> -----Original Message-----
> From: Assaf Arkin [mailto:arkin@intalio.com]
> Sent: Thursday, September 25, 2003 9:43 PM
> To: Satish Thatte
> Cc: Maciej Szefler; wsbpel@lists.oasis-open.org
> Subject: Re: [wsbpel] Issue 36 - Multiple instances of event handler
>
> The outline of my proposal would be:
>
> 1. The name of the variable is given in the
> onMessage/@inputVariable attribute.
>
> 2. The variable type is the same as the type of the input
> message defined by the operation referenced by onMessage.
>
> 3. The event handler declares a variable of that name and
> type that is scoped to the event handler activity.
>
> 4. Upon receipt of the input message the event handler
> assigns the input message to the variable before proceeding
> to perform the event handler activity.
>
> 5. Since the variable is scoped to that activity, two
> instances of the activity (whether executed seriallly or
> concurrently) do not operate on the same variable.
>
> Comments?
>
> arkin
>
> Satish Thatte wrote:
>
> >Wonderful.  Since you are the champion, you get to propose
> the solution!
> >
> >Cheers,
> >Satish
> >
> >
> >
> >-----Original Message-----
> >From: Assaf Arkin [mailto:arkin@intalio.com]
> >Sent: Thursday, September 25, 2003 8:51 PM
> >To: Satish Thatte
> >Cc: Maciej Szefler; wsbpel@lists.oasis-open.org
> >Subject: Re: [wsbpel] Issue 36 - Multiple instances of event handler
> >
> >Satish, I perfectly agree with you.
> >
> >The "copy" as I understand it requires two variables to be
> defined. My
> >proposal was for the event handler to declare a variable
> that is local
> >to the event handler based on the message type and assign the input
> >message to that variable. This does not require the variable to be
> >defined in the same (or enclosing) scope as the event handler. From
> >what
> >
> >I can tell this requires no change to the syntax.
> >
> >And since Satish offered the catch/faultVariable as an
> example, I think
> >there's a general rule here that could apply in more than one case.
> >
> >arkin
> >
> >Satish Thatte wrote:
> >
> > 
> >
> >>Maciej,
> >>
> >>I seem to have misunderstood what we agreed at the recent F2F.  I
> >>thought everyone present agreed including Assaf that we need the
> >>*semantics* of the two syntactic variants I described below.  We
> >>didn't really discuss syntax in detail.
> >>
> >>Assaf, if you disagree please let us know.
> >>
> >>Satish
> >>
> >>
> >>   
> >>
> >
> >
> >
> > 
> >
>
>
> --
> "Those who can, do; those who can't, make screenshots"
>
> ----------------------------------------------------------------------
> Assaf Arkin                                          arkin@intalio.com
> Intalio Inc.                                           www.intalio.com
> The Business Process Management Company                 (650) 577 4700
>
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