Hi Matthieu, thanks for replying so quickly, this has me a bit blocked.
My activity is the first in the process. I'm trying to create a
process that can receive either an asynchronous or a synchronous
exchange. I'm quite new to BPEL so maybe I'm wrong, but I think the
process should start with a "pick" that will have the two options of
receiving one message or the other. I've tried using "onMessage"
inside the pick but it doesn't receive any message, but using
"receive" it does (I thought they were sort of the same). The problem
is that inside a "receive" it's not possible to put a "sequence" as
you can do with the "onMessage", or is it? So I thought maybe
"onMessage" does need a correlationSet.
As you can see, I'm a bit lost, I've been looking for documentation
but I haven't found much.
In conclusion, should any correlation set be needed for something like
the following?
<process>
<pick>
<onMessage> (or receive)
<sequence/>
</onMessage> (or receive)
<onMessage> (or receive)
<sequence/>
</onMessage> (or receive)
</pick>
<sequence/>
</process>
On Fri, Jun 20, 2008 at 4:53 PM, Matthieu Riou <[EMAIL PROTECTED]> wrote:
> On Fri, Jun 20, 2008 at 7:15 AM, Sebastian Gomez <[EMAIL PROTECTED]> wrote:
>
>> Hi everyone.
>>
>> I'm trying to implement a bpel process that will expect one of two
>> possibilities of message type. I've thought the best way to implement
>> it would be using a "pick", but all the examples I've seen seem to be
>> using pick + correlation sets. Is it mandatory to use these
>> correlation sets? Why are they needed?
>>
>
> Ha! correlation sets, what a wondrous beast. Basically it's the only way in
> BPEL to send two messages to the same instance. Doing so requires agreeing
> on an identifier for the instance, correlation sets represent both the
> identifier (by way of properties) and how to extract it from messages (by
> way of property aliases).
>
> Getting back to your pick, if it's the first activity in the process, you
> won't have to worry about correlating it (although you may need that later)
> but if it's after the instance has been started, you will definitely have to
> mess with correlation.
>
> Cheers,
> Matthieu
>
>
>>
>> Thanks in advance.
>>
>> Sebastian Gomez.
>>
>
