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Re: [stp-dev] Relationship/codesharing etc between BPEL and BPMN projects
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Hi Bill.
I am one of the contributers for the STP.BPMN project.
I don't think the 2 projects overlap:
you can walk through a BPMN graph and try to generate BPEL out of it.
we could feed that to the BPEL editor.
Or the other way round: you could create a BPMN object model out of a
BPEL object model and display that in the BPMN editor.
Hence the generation-transformation code must be aware of the 2
projects. I am not sure there is much to share for the 2 projects
outside of that context.
The fundamental reason is that the BPEL semantics and the BPMN
semantics are very different. So a UI for BPEL is fundamentally
different from an equivalent process displayed with BPMN.
An example of the difference:
BPEL defines a sequence of activities by placing them into a container object:
you will see a container shape for a bpel:sequence element.
BPMN defines a sequence of activities by having them connected in a
graph structure:
there is no container.
My apologies to the contributers of the BPEL project if these
conclusions are mislead.
Please do correct me.
Best regards,
Hugues.
On 11/15/06, Bill.Murray@xxxxxxxx <Bill.Murray@xxxxxxxx> wrote:
I am interested to know if the BPMN project and the BPEL project have any
intent of sharing code at some point. As I understand things:
BPMN project - scope limited to a BPMN diagram editor and associated ecore
model. Extension points will be provided to allow others to generate BPEL
code on the back end, and enhance UI as needed.
BPEL project - This is a BPEL specific editor. Extension points will allow
to add new activity types and generate associated bpel code.
So, from what I can see, the BPEL project has a lot of functionallity for a
BPEL specific editor, including all the management of WSDL files, and
generating the BPEL file from the data model. The BPMN project has the UI
for a BPMN designer.
It seems that if one goal fo BPMN is to allow extension to generate BPEL,
then much of the code done by the BPEL project in theory could be used to
do it. However, I am not sure the organization of the code in either
project makes it very usefull in the other, short of a major cut/paste
effort. Can someone say what woudl be a reasonable approach would be. Can a
reasonable mapping layer be built across these 2 projects to result in a
BPMN editor that supports BPEL, or is that just to much to ask.
Is there anyone out there thinking about these issues.....
-Bill
Bull Information Systems
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