I see two ways to go about it.
1. First, quick and dirty, is to not use ROP. Just create your own
web service with specific query methods, and serialize the results to
XML via Cayenne XML package (or some other way).
2. Second is what Ari just described. Objective C client is using
Hessian protocol (just as Java). You may use that or try to build
upon the ROP-WSDL done as a part of Summer of Code 2006 by a student:
http://svn.apache.org/repos/asf/cayenne/soc/trunk/cayenne-ropwsdl/
This exposes ROP server as a WSDL, so this is sort of a standard
extension protocol and it may (or may not?) be easier to get the
client going.
First option should work for most apps, as long as the client logic
is not too complex and you do not need to commit object graphs from
the client. The second option provides maximum client power, but
would also require some serious dedication to implement.
Andrus
On Aug 1, 2007, at 1:27 PM, Aristedes Maniatis wrote:
On 01/08/2007, at 6:34 PM, Jan Lendholt wrote:
I read about the Remote funcitonality in cayenne but I guess it is
not possible to connect this service to .Net.
Someone has already done some work to write a ROP Cayenne client in
Objective C, and Cayenne has as a design goal that other clients
are certainly possible. The place to start would be to look at
Hessian and dig up one of the many implementations of it for
different platforms. That is the serialisation layer and is needed
to get the http data stream back into objects at the remote end.
After that, you'll need to examine what Cayenne ROP does (or dig up
that Objective C implementation) and implement that for your chosen
platform. IMO such a project would be welcomed by a great many
people and offers great promise for remote rich GUI applications.
Ari Maniatis
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Aristedes Maniatis
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