When trying to run a test client against a RESTeasy web service, I encounter the following error:

java.lang.RuntimeException: java.lang.NullPointerException
at org.jboss.resteasy.client.core.ClientInvoker.invoke(ClientInvoker.java:104)
at org.jboss.resteasy.client.core.ClientProxy.invoke(ClientProxy.java:59)
at $Proxy13.saveMessage(Unknown Source)
at com.techma.shepherd.client.TestClient.main(TestClient.java:36)
Caused by: java.lang.NullPointerException
at org.jboss.resteasy.core.interception.MessageBodyWriterContextImpl.proceed(MessageBodyWriterContextImpl.java:114)
at org.jboss.resteasy.client.ClientRequest.writeRequestBody(ClientRequest.java:372)
at org.jboss.resteasy.client.core.ApacheHttpClientExecutor$ClientRequestEntity.<init>(ApacheHttpClientExecutor.java:105)
at org.jboss.resteasy.client.core.ApacheHttpClientExecutor.loadHttpMethod(ApacheHttpClientExecutor.java:173)
at org.jboss.resteasy.client.core.ApacheHttpClientExecutor.execute(ApacheHttpClientExecutor.java:53)
at org.jboss.resteasy.client.ClientRequest.execute(ClientRequest.java:338)
at org.jboss.resteasy.client.ClientRequest.httpMethod(ClientRequest.java:535)
at org.jboss.resteasy.client.core.ClientInvoker.invoke(ClientInvoker.java:100)
... 3 more

The client code:

public class TestClient {

public static void main(String[] args) {
MessageTFM m = new MessageTFM();
m.setMsgId(new BigDecimal(42));
m.setCreatedDate(new Date());
m.setDestinationId("ABCD1234");
m.setMsgComp(new BigDecimal(2));
m.setNumLocTfmsProvided(new BigDecimal(14));
m.setSourceId("WXYZ6789");
m.setVersionMajor("4");
m.setVersionMinor("1");
IMessageTFMResource client = ProxyFactory.create(
IMessageTFMResource.class,
"http://localhost:8080/GPRI/seam/resource/rest");
try

{ Response r = client.saveMessage(m); assert r.getStatus() == 201; }

catch (Exception e)

{ // TODO Auto-generated catch block e.printStackTrace(); }

}
}

and the interface class:

@Path("/messages/TFM")
public interface IMessageTFMResource {

@GET
@Produces("application/xml")
@Path("

{id}")
public MessageTFM getMessage(@PathParam("id") BigDecimal id);

@POST
@Consumes("application/xml")
public Response saveMessage(MessageTFM msg);

@PUT
@Produces("application/xml")
@Consumes("application/xml")
@Path("/{id}

")
public Response updateMessage(@PathParam("id") int id, MessageTFM msg);

@DELETE
@Consumes("application/xml")
@Produces("application/xml")
@Path("/

{id}

")
public Response deleteMessage(@PathParam("id") int id);

@POST
@Produces("application/xml")
@Consumes("application/xml")
@Path("/matching")
public List<MessageTFM> getMatchingMessages(MessageTFM msg);

}

I asked about this on the Seam forums and was told to post this as a bug here. If it's a configuration (or other) issue on my side, I'm perfectly ready to admit as much. I can provide the MessageTFM class if needed but omitted it for brevity (it's rather lengthy).

Thanks.