Re: [wsbpel] Issue 37 - F2F Presentation Draft

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

Hi, Alex,

In your example, op3 is invoked only after both
of the two "receive op2" are completed because
flow is completed only after all of its children
complete. Therefore, initiating CS2 only once at
either "receive op2" should be enough. Then we
don't have to worry about "initiating a CS twice".

Yuzo Fujishima
NEC Corporation

Alex Yiu wrote:

> 
> Hi, Yuzo and all others,
> 
> Regarding to Issue 37, we need to choose between (1A) or (1B) semantics.
> 
> I am just think out loud ... Do we need to accomodate the following 
> situation??
> 
> -----------------------------------------
> <sequence>
>    <flow>
>        <sequence>
>            <invoke op1 with initiating CS1A from request with 
> service-provider-A />            <receive op2 matching with initiated 
> CS1A and initiating CS2 with service-provider-A />
>        </sequence>
>        <sequence>
>            <invoke op1 with initiating CS1B from request with 
> service-provider-B />
>            <receive op2 matching with initiated CS1B and initiating CS2 
> with service-provider-B />
>        </sequence>
>    </flow>
>    <invoke op3 with initiated CS2 with service-provider-C />
>    <receive op4 ... />
> <sequence>
> -----------------------------------------
> 
> E.g.: Let me try to provide some business semantics for this process: 
> let say this is a person background screening process.
> Step - 1: (op1 and op2) given employee name profile, retrieve its SSN.
> Step - 2: (op3 and op4) given SSN, check his or her background.
> 
> Please note that :
> (i) Step-1 will be done in a parallel fashion. Step-2 will proceed 
> whichever provider respond first.
> (ii) CS1A contains the temporary id for this person (maybe a UUID) and 
> provider-id for provider-A
> (iii) CS1B contains the same temporary id for this person (maybe a UUID) 
> and provider-id for provider-B
> (iii) CS2 contains the SSN.
> (iv) receive-op2 is NOT a start activity
> 
> 
> If we choose (1A), it may give us some unnecessary complication?
> 
> (Can this be also related to Issue 4 or parallel for-each?)
> 
> 
> 
> Regards,
> Alex Yiu
> 
> 
> 
> Yuzo Fujishima wrote:
> 
>> Hi,
>>
>> Please find attached a presentation draft for Issue 37
>> to be used at the comming F2F meeting, hopefully.
>>
>> Yuzo Fujishima
>> NEC Corporation
>>
>>  
>>
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> 
>