You're missing Viju's point, Steve. Of course it's easy to build
services that utilize complex objects. Viju's question - a deep and
important one, imho - is about limitations on the client, not on the
server. I hope Viju won't mind if I paraphrase it:
/If a service returns a "complex object" - i.e., an object whose
properties are not all primitive - then what are the limitations on the
client?/
Many services are produced on the assumption that the consumer uses a
code base related to that of the producer - including, for instance,
interfaces that can be used as proxies for the objects returned by the
service. If this is true, it makes a mockery of a key part of the SOA
concept, namely the supposed independence of producer and consumer. But
what client technologies allow you to call services from anywhere,
without access to the producer's code base, and utilize programmatically
the complex objects that are returned?
I have asked exactly this question before to this group
<http://tech.groups.yahoo.com/group/service-orientated-architecture/message/2400>,
since I have been looking for solutions since 2001. And the _only_
practical suggestion I got was from Aleksander Slominski, whose XSUL
project <http://www.extreme.indiana.edu/xgws/xsul/> includes a "Super
Dynamic Invoker" (based on WSIF, which I also used in an earlier attempt
to deal with the problem).
As you say, Steve, "there should be no limitations" - but there
certainly appear to be at the moment.
--
All the best
Keith
http://keith.harrison-broninski.info
Steve Jones wrote:
1) Service is a business concept
So I'm assuming you are talking about WS-*. If you can't return
complex XML schemas from your WS-* implementation then quite frankly
its rubbish. There should be no limitations.
Steve
On 06/12/06, *darlin' Viju* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
All,
Is there any limitations for the return type of a service ?
My understanding is the service should return only primitive types
and objects which has primitive types as variables. This is to
ensure that the service can be used across languages.
Is this correct or is it like there is no limitation at all?
Is it posible to return an xml from a service?
Thanks,
- d Vj
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