On Wed, Nov 27, 2024 at 12:19:02PM -0500, apache-karaf-...@pyr3x.com.INVALID
wrote:
> On Wed, Nov 27, 2024 at 11:18:45AM -0500, apache-karaf-...@pyr3x.com.INVALID
> wrote:
> > Hello,
> >
> > There seems to be an issue with the Jackson JSON processing.
> >
> > From a clean karaf 4.4.6 install I do:
> >
> > feature:install scr
> > feature:repo-add aries.jax.rs.whiteboard
> > feature:repo-add cxf
> > feature:install aries-jax-rs-whiteboard-jackson
> >
> > I then deploy a simple bundle:
> >
> > @Component(service = TestResource.class, scope = ServiceScope.PROTOTYPE)
> > @JaxrsResource
> > //@JaxrsApplicationSelect("(" + JaxrsWhiteboardConstants.JAX_RS_NAME + "="
> > + MyApplication.NAME + ")")
> > public class TestResource {
> >
> > @GET
> > @Path("hello")
> > @Produces(MediaType.APPLICATION_JSON)
> > public Woot sayHello(){
> > return new Woot();
> > }
> >
> > @GET
> > @Path("hello2")
> > @Produces(MediaType.TEXT_PLAIN)
> > public String sayHello2(){
> > return "test\n";
> > }
> > }
> >
> > curl localhost:8181/hello2 returns 'test'
> >
> > the second curl should return the json of Woot which is just a simple
> > class with a getName(), however, the first invocation will return the
> > following. The second invocation does what is expected.
> >
> > Caused by: java.lang.ClassNotFoundException:
> > com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector not found by
> > com.fasterxml.jackson.jaxrs.jackson-jaxrs-json-provider [62]
> > at
> > org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1591)
> > ~[?:?]
> > at
> > org.apache.felix.framework.BundleWiringImpl.access$300(BundleWiringImpl.java:79)
> > ~[?:?]
> > at
> > org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1976)
> > ~[?:?]
> > at java.lang.ClassLoader.loadClass(ClassLoader.java:525) ~[?:?]
> > at
> > com.fasterxml.jackson.jaxrs.json.JsonMapperConfigurator._resolveIntrospector(JsonMapperConfigurator.java:126)
> > ~[?:?]
> > at
> > com.fasterxml.jackson.jaxrs.json.JsonMapperConfigurator._resolveIntrospectors(JsonMapperConfigurator.java:101)
> > ~[?:?]
> > at
> > com.fasterxml.jackson.jaxrs.cfg.MapperConfiguratorBase._setAnnotations(MapperConfiguratorBase.java:120)
> > ~[?:?]
> > at
> > com.fasterxml.jackson.jaxrs.json.JsonMapperConfigurator.getDefaultMapper(JsonMapperConfigurator.java:51)
> > ~[?:?]
> > at
> > com.fasterxml.jackson.jaxrs.base.ProviderBase.locateMapper(ProviderBase.java:925)
> > ~[?:?]
> > at
> > com.fasterxml.jackson.jaxrs.base.ProviderBase._endpointForWriting(ProviderBase.java:697)
> > ~[?:?]
> > at
> > com.fasterxml.jackson.jaxrs.base.ProviderBase.writeTo(ProviderBase.java:572)
> > ~[?:?]
> > at
> > org.apache.cxf.jaxrs.utils.JAXRSUtils.writeMessageBody(JAXRSUtils.java:1651)
> > ~[!/:3.6.4]
> > at
> > org.apache.cxf.jaxrs.interceptor.JAXRSOutInterceptor.serializeMessage(JAXRSOutInterceptor.java:249)
> > ~[!/:3.6.4]
> >
> > This assumes using the default whiteboard. If I create an application
> > and set the following:
> >
> > @Component(service = Application.class, property = {
> > "servlet.init.hide-service-list-page=false" })
> > @JaxrsName(MyApplication.NAME)
> > @JaxrsApplicationBase("/test")
> > public class MyApplication extends Application {
> >
> > public static final String NAME = "my-app";
> > }
> >
> > And then I uncomment the JaxRsApplicationSelect, it will report there
> > are no message body writers at all. I had assumed that bringing in the
> > aries-jax-rs-whiteboard-jackson feature would register the provider to
> > all contexts. It seems only to work with the default context but only
> > after the first invocation fails.
> >
> > A side note when deploying multiple applications I have to set the
> >
> > org.apache.cxf.osgi.http.transport.disable=true
> >
> > This is neither here nor there I just found it on a forum. I think there
> > should be more examples.
> >
> > I have also noticed that bringing in that aries whiteboard jackson
> > relies on cxf-jaxrs which brings in different versions of the jackson
> > libraries. Perhaps this should be removed.
> >
> > Any ideas how to resolve this for the case of the default whiteboard and
> > registering the provider when not deployed to the default using
> > Application?
> >
> > --
> > Chaz
>
> Upon further testing, if I had a @XmlRootElement to the Woot class, I no
> longer have an issue with finding the message body writer when deploying
> using an Application, however, using the default whiteboard still
> produces that issue of having to invoke it once first.
>
> --
> Chaz
In order to get Application to work correctly with JSON I had to:
@Override
public Set<Class<?>> getClasses() {
return Set.of(JacksonJaxbJsonProvider.class);
}
I've also had to remove the @JSONRequired annotation from the Resource.
This _should_ work from what I've looked at:
[javax.ws.rs.ext.MessageBodyReader, javax.ws.rs.ext.MessageBodyWriter]
----------------------------------------------------------------------
jackson.jaxb.version = 2.17.1
jackson.jaxrs.json.version = 2.17.1
service.id = 264
osgi.jaxrs.extension = true
service.bundleid = 68
service.scope = prototype
*** osgi.jaxrs.media.type = application/json
osgi.jaxrs.name = jaxb-json
service.ranking = -2147483648
Provided by :
Apache Aries JAX-RS Jackson JAXB-JSON (68)
Used by:
Apache Aries JAX-RS Whiteboard (69)
Installing the feature aries jaxrs jackson feature installs this and
that has the media type property set that should be picked up by the
@JSONRequired, however, it does not appear to do this. I've also tried
doing the @JaxrsExtensionSelect("(osgi.jaxrs.name=jaxb-json)") on my
Resource but this didn't work either.
--
Chaz
