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From Tony Giaccone <>
Subject Re: Webservice and Cayenne
Date Thu, 25 Aug 2011 11:57:10 GMT

I'm curious why you are using the tapestry IoC container. What purpose does it serve?

Tony Giaccone

Life is what you live today.

On Aug 24, 2011, at 5:07 PM, Andrus Adamchik <> wrote:

> I am using Cayenne with Jersey frontend ( )  and a Tapestry 5
IoC container in between. Jersey is a JAX RS implementation and can serialize objects based
on standard JAXB annotations, generating either XML or JSON. 
> While there's no direct JAXB bindings for Cayenne DataObjects, I'd use very simple annotated
DTO's converting between Cayenne and DTO in each Jersey resource class.
> What I find interesting is that the DTO conversion is not simply a workaround for the
lack of direct serialization. It actually allows to bridge the mismatch between the DB schema
and the desired end user format of the output.
> Like the above stack a lot - very simple and clean frontend code, ties nicely to fairly
abstract backend business logic, very little configuration.
> Andrus
> On Aug 24, 2011, at 7:51 PM, Tony Giaccone wrote:
>> I'm interested in implementing a Restful web service using Cayenne as the
>> backing ORM. My guess is that there are some people on this list who may
>> have opinions on how might best be implemented. My intent is to vend json to
>> the clients.  I know that ROP and the hessian protocol are actively being
>> used, but I don't think those have a place in what I want to build (no jvm
>> on client side).
>> In particular there I've seen some discussions about using DTO's and custom
>> template generation. I'm especially interested in how this is accomplished.
>> Anyone care to comment?
>> Tony Giaccone

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