Hi Marko
On 26/03/12 16:04, Voß, Marko wrote:
Hello,
we have an issue, where we cannot return the javax.ws.rs.core.Response
type in our method signatures of our JAX-RS interfaces. Example:
@Path("/foo")
public interface Foo {
@Path("/{id}")
...
JaxbFooObj retrieveFoo(@PathParam("id") String id) {
return logic.retrieve(id);
}
}
JaxbFooObj is a class generated by the JAXB maven-plugin, generated from
a schema file. The data of JaxbFooObj may be stored into a database. The
timestamp when this data has been stored or changed should become the
'Last-Modified' HTTP header value according to RFC 2822 or RFC 5322.
Returning javax.ws.rs.core.Response is no option because we need the
WADL-generator to use the return type to add the element type to the
representation element. Example:
<representation mediaType="text/xml" element="prefix1:foo"/>
Adding a method-level ElementClass annotation
(http://svn.apache.org/repos/asf/cxf/trunk/rt/frontend/jaxrs/src/main/java/org/apache/cxf/jaxrs/model/wadl/ElementClass.java)
to the method returning Response should do it...
I tried to solve this by writing a CXF interceptor:
public class CustomOutInterceptor extends
AbstractOutDatabindingInterceptor {
public CustomOutInterceptor() {
super(Phase.POST_LOGICAL);
}
public void handleMessage(Message message) {
Map<String, List<String>> headers = (Map<String,
List<String>>)message.get(Message.PROTOCOL_HEADERS);
if (headers == null) {
headers = new TreeMap<String,
List<String>>(String.CASE_INSENSITIVE_ORDER);
message.put(Message.PROTOCOL_HEADERS, headers);
}
List contents = message.getContent(List.class);
if (contents != null) {
for (int i=0; i<contents.size(); i++) {
if (contents.get(i) instanceof MetaObject) {
MetaObject meta = (MetaObject)contents.get(i);
contents.set(i, meta.getObj());
List<String> foo = new ArrayList<String>();
foo.add(meta.getLMD().toString());
headers.put("Last-Modified", foo);
return;
}
}
}
}
}
The MetaObject contains the JaxbFooObj and the last modification date.
This works but again, the element type is missing the in the generated
WADL. So the result is the same as by simply returning
javax.ws.rs.core.Response.
Is JaxbFooObj instance of MetaObject and with the method returning
JaxbFooObj ? If yes then having the above interceptor should not affect
the WADL generation.
You should also be able to se ResponseHandler filter and override the
Response there by copying the original Response and adding the required
header. By the way, do you expect the timestamp property returned to the
client ? If no then it can be stripped off with the transform feature
Cheers, Sergey
Can anyone help on this issue please?
Thank you in advance and kind regards,
Marko
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