I know nothing about OSGi.
My guess is that Resteasy automatic provider lookup is not working. The
way it works is that it does a
Classloader.getResources("META-INF/javax.ws.rs.ext.Providers") and
iterates througha nd loads all those files. Those files contain Java
class names which represent the providers.
On 5/23/2014 9:26 AM, Rohrberg, Timo wrote:
> Hello everybody,
>
> I am currently trying to use the RESTEasy client framework within an
> OSGi environment (Eclipse Equinox). To provide the required
> dependencies, I created a separate Eclipse Plug-In containing the
> required JAR libraries and exporting the contained packages to
> downstream bundles. Then, I am using the RESTEasy client framework as
> follows within my main bundle which includes the before mentioned bundle
> as required bundle:
>
> ResteasyClient client = *new*ResteasyClientBuilder().build();
>
> ResteasyWebTarget target = client
>
> .target(
> _"http://192.168.100.181:5952/RXT_RESTWebService-2.1/jobtemplates/Vitaphone
> 300 BT/386340"_);
>
> RxtDevice device = target.request().get( RxtDevice.*class*);
>
> System./out/.println( device.getId() );
>
> Unfortunately, I always get the following error:
>
> _javax.ws.rs.client.ResponseProcessingException_:
> _javax.ws.rs.ProcessingException_: Unable to find a MessageBodyReader of
> content-type application/xml and type class
> com.vitasystems.remosxt.rest.client.model.RxtDevice
>
> at
> org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.extractResult(_ClientInvocation.java:140_)
>
> at
> org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.invoke(_ClientInvocation.java:444_)
>
> at
> org.jboss.resteasy.client.jaxrs.internal.ClientInvocationBuilder.get(_ClientInvocationBuilder.java:165_)
>
> at
> de.vitasystems.example.resteasy.client.Activator.start(_Activator.java:25_)
>
> at
> org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(_BundleContextImpl.java:711_)
>
> at java.security.AccessController.doPrivileged(_Native Method_)
>
> at
> org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(_BundleContextImpl.java:702_)
>
> at
> org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(_BundleContextImpl.java:683_)
>
> at
> org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(_BundleHost.java:381_)
>
> at
> org.eclipse.osgi.framework.internal.core.AbstractBundle.resume(_AbstractBundle.java:390_)
>
> at
> org.eclipse.osgi.framework.internal.core.Framework.resumeBundle(_Framework.java:1176_)
>
> at
> org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(_StartLevelManager.java:559_)
>
> at
> org.eclipse.osgi.framework.internal.core.StartLevelManager.resumeBundles(_StartLevelManager.java:544_)
>
> at
> org.eclipse.osgi.framework.internal.core.StartLevelManager.incFWSL(_StartLevelManager.java:457_)
>
> at
> org.eclipse.osgi.framework.internal.core.StartLevelManager.doSetStartLevel(_StartLevelManager.java:243_)
>
> at
> org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(_StartLevelManager.java:438_)
>
> at
> org.eclipse.osgi.framework.internal.core.StartLevelManager.dispatchEvent(_StartLevelManager.java:1_)
>
> at
> org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(_EventManager.java:230_)
>
> at
> org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(_EventManager.java:340_)
>
> Caused by: _javax.ws.rs.ProcessingException_: Unable to find a
> MessageBodyReader of content-type application/xml and type class
> com.vitasystems.remosxt.rest.client.model.RxtDevice
>
> at
> org.jboss.resteasy.core.interception.ClientReaderInterceptorContext.throwReaderNotFound(_ClientReaderInterceptorContext.java:39_)
>
> at
> org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.getReader(_AbstractReaderInterceptorContext.java:73_)
>
> at
> org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(_AbstractReaderInterceptorContext.java:50_)
>
> at
> org.jboss.resteasy.plugins.interceptors.encoding.GZIPDecodingInterceptor.aroundReadFrom(_GZIPDecodingInterceptor.java:59_)
>
> at
> org.jboss.resteasy.core.interception.AbstractReaderInterceptorContext.proceed(_AbstractReaderInterceptorContext.java:53_)
>
> at
> org.jboss.resteasy.client.jaxrs.internal.ClientResponse.readFrom(_ClientResponse.java:245_)
>
> at
> org.jboss.resteasy.client.jaxrs.internal.ClientResponse.readEntity(_ClientResponse.java:179_)
>
> at
> org.jboss.resteasy.specimpl.BuiltResponse.readEntity(_BuiltResponse.java:211_)
>
> at
> org.jboss.resteasy.client.jaxrs.internal.ClientInvocation.extractResult(_ClientInvocation.java:104_)
>
> ... 18 more
>
> By debugging the included libraries, I tracked the problem down to the
> following location:
>
> ResteasyProviderFactory.java
>
> *protected*<T> MessageBodyReader<T> resolveMessageBodyReader(Class<T>
> type, Type genericType, Annotation[] annotations, MediaType mediaType,
> MediaTypeMap<SortedKey<MessageBodyReader>> availableReaders)
>
> {
>
> List<SortedKey<MessageBodyReader>> readers =
> availableReaders.getPossible(mediaType, type);
>
> //logger.info("******** getMessageBodyReader *******");
>
> *for*(SortedKey<MessageBodyReader> reader : readers)
>
> {
>
> //logger.info(" matching reader: " + reader.getClass().getName());
>
> *if*(reader.obj.isReadable(type, genericType, annotations, mediaType))
>
> {
>
> *return*(MessageBodyReader<T>) reader.obj;
>
> }
>
> }
>
> *return**null*;
>
> }
>
> The problem is a little weired: The readers list of MessageBodyReader
> instances contains the
> org.jboss.resteasy.plugins.providers.jaxb.JAXBXmlRootElementProvider,
> but the reader.obj.isReadable() method returns false for that reader.
>
> In another setup as a plain Maven project outside of the OSGi world, the
> the referred method reader.obj.isReadable() returns true and the same
> piece of code works.
>
> I am at the end of my knowledge… Do you guys have any hints?
>
> Best regards,
>
> Timo Rohrberg
>
>
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JBoss, a division of Red Hat
http://bill.burkecentral.com
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