Re: Supporting custom JSON formats

[Sergey Beryozkin]

Hi Guy

On 11/12/11 08:57, Guy Pardon wrote:
Hi,
I am trying to define a custom hypermedia model (cf REST in Practice) as the 
return type of my REST service.

With MIME type "application/json" this works, but with type 
"application/vnd.example-com.foo+json" (which is what I want) this fails, however. 
Calling the service URL gives:

"org.apache.cxf.jaxrs.interceptor.JAXRSOutInterceptor writeResponseErrorMessage
WARNING: No message body writer has been found for response class ListResult."

My service method:

        @GET
        @Path("list")
        @Produces("application/vnd.example-com.foo+json")
        public ListResult retrieveList() {
                return new ListResult();
        }

My configuration code looks like this:

        JAXRSServerFactoryBean sf = new JAXRSServerFactoryBean();
         JSONProvider prov = new JSONProvider();

        // setting custom mime types does not seem to work?
         List<String>  mimeTypes = new ArrayList<String>();
         mimeTypes.add("application/vnd.example-com.foo+json");
         mimeTypes.add("application/json");
         prov.setProduceMediaTypes(mimeTypes);

        // following is regular CXF config as usual
         prov.setDropRootElement(true);
         sf.setProvider(prov);
         sf.setResourceClasses(ListService.class);
         sf.setResourceProvider(ListService.class,
             new SingletonResourceProvider(new ListService()));
         sf.setAddress("http://localhost:9000/";);
         sf.create();


Did I miss anything? I am using CXF 2.4.1...

I've updated one of the existing tests on the trunk and it works fine 
for me, here is a trace:
----------------------------
ID: 1
Address: http://localhost:9000/the/bookstore/books/123
Http-Method: GET
Content-Type: */*
Headers: {Accept=[application/vnd.example-com.foo+json], 
accept-encoding=[gzip;q=1.0, identity; q=0.5, *;q=0], 
Cache-Control=[no-cache], connection=[keep-alive], content-type=[*/*], 
Host=[localhost:9000], Pragma=[no-cache], User-Agent=[Java/1.6.0_26]}
--------------------------------------
12-Dec-2011 10:15:28 org.apache.cxf.interceptor.LoggingOutInterceptor
INFO: Outbound Message
---------------------------
ID: 1
Response-Code: 200
Content-Type: application/vnd.example-com.foo+json
Headers: {Date=[Mon, 12 Dec 2011 10:15:28 GMT]}
Payload: {"Book":{"id":123,"name":"CXF in Action"}}

I set produceMediaTypes on JSONProvider (from Spring),
can you confirm please
Accept: application/vnd.example-com.foo+json

is set on the wire, LoggingInInterceptor can help

Cheers, Sergey



Thanks
Guy


--
Sergey Beryozkin

Talend Community Coders
http://coders.talend.com/

Blog: http://sberyozkin.blogspot.com