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Re: SCA and business processes [message #27345] Tue, 27 January 2009 11:07
Eclipse User
Originally posted by: mickael.istria.openwide.fr

Failed crossposting
Sorry for spamming

Mickael Istria a écrit :
> Hello Michael,
>
> (I cross-post this message to the Java Workflow Tooling newsgroup since
> BPM using SOA is an important topic for this project)
>
>
> I would add to the list of articles Stephane pointed you another
> interesting one:
>
> * "BPM is not software engineering"
> http://www.infoq.com/news/2009/01/BPMSoftwareEngineering
>
> IMHO, SCA is "only" a Sofware Engineering technology that makes the
> composition, use and exposition of services easier.
> You should use it when you want to create an _application_ that makes
> use of several fine-grained services to create more coarse-grained
> business logic units (and eventually expose them as services).
>
> According to this article (and my personal thoughts ;)) you should not
> try to use SCA as a modeling or technical solution for Business Process.
> BPM already has a set of technology (BPMS, workflow engines,
> modelers...) and languages (BPMN, XPDL...) that are made for it.
> The ability to call services in Business Processes must come from those
> technologies.
> A lot of BPM-related projects (eg JWT, Bonita, in a near future probably
> OW2 Scarbo) are working to make consumption of services easy in business
> process. But this is not yet a "native" feature.
>
> Calling services in workflows is a topic I am currently working on in
> the context of SCorWare & Scarbo projects. For this, we use OW2 Frascati
> SCA implementation as a "Service Provider" to make the bridge between
> BPM and SOA. The interest of using SCA in such case is that it provides
> a common solution for several services bindings and implementations, but
> also that we believe that SCA is a well-grained technology to implement
> processes automated tasks (a business analyst models a business process
> that contains some automated tasks, that tasks will have to be
> implemented by a developer, in such situation SCA seems really fine).
>
>
> PS: an implementation.bpel seems to exist in Tuscany, using ODE
> http://tuscany.apache.org/sca-java-implementationbpel.html
>
>
> Regards,
> Mickael
>
>
> Stephane Drapeau a écrit :
>> Hi Michael,
>>
>> Michael Gebhart a écrit :
>>> Hi,
>>>
>>> I have a problem understanding the intention of SCA. Of course I
>>> know, what I can do with it, but I do not see why and when I should
>>> use it.
>>>
>>> In my opinion it seems to be well-suited for building software
>>> applications that consists of several components.
>>>
>>> But what about business processes and SCA? I have 10 existing systems
>>> that provide their capability by means of web services. Now I want to
>>> realize a business processes requiring those capabilities. Here I
>>> need user interfaces to interact with the process and so on. Sure, I
>>> can use bpel as implementation for a component.
>>>
>>> But why should I do this? I have Webservices, I have BPEL-engines. I
>>> don't see the advantages.
>>>
>>> And if I want to have components I can use Java. Sure, SCA supports
>>> several languages. But SCA does not support .NET as one of the most
>>> important big players.
>>>
>>> Maybe you can help me, why SOA needs SCA :) Isn't IBM the only
>>> enterprise using SCA? Haven't seen SCA engines from Oracle/BEA, SAP etc.
>>
>> Some interesting articles:
>>
>> - SOA is dead; long live Model-Driven SOA (January 26, 2009) [0]
>>
>> - Oracle Tuxedo 10gr3 (January 21, 2009): [1]
>> "Certainly the most exciting part of these releases is the support for
>> the Service Component Architecture (SCA) in SALT 10gR3."
>>
>> - SAP: [2]
>> SAP forms part of the OASIS SCA-BPEL TC.
>>
>> - Relevance of the Service Component Architecture Standard to a
>> Business Process Expert (an old article from SAP): [3]
>>
>>
>> Stephane Drapeau
>> Obeo
>>
>> [0]:
>> http://www.theenterprisearchitect.eu/archive/2009/01/26/soa- is-dead-long-live-model-driven-soa
>>
>> [1]:
>> http://blogs.oracle.com/Tuxedo/2009/01/oracle_tuxedo_10gr3_r eleases_1.html
>>
>> [2]:
>> https://www.sdn.sap.com/irj/sdn/index?rid=/webcontent/uuid/2 aff9bd8-0701-0010-5db4-beec85d4008e
>>
>> [3]:
>> https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/ library/uuid/7bf32533-0c01-0010-a6a2-eb16a23ea817
>>
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