Jersey客户端无法通过JAXB Moxy序列化发送/接收XML消息？

Question

I'm trying to use the jersey-client to make some RESTful requests with XML messages. I don't want to serve any endpoints so there are no jersey-server packages involved.
For the testing purposes I'm using the publicly reachable http://www.thomas-bayer.com/sqlrest/CUSTOMER testing service.

As stated in 9.2.4. Using Custom JAXBContext I have a custom ContextResolver class which is:

@Provider
@Produces({"application/xml"})
public class MyJaxbContextProvider implements ContextResolver<JAXBContext> {

  private JAXBContext context;

  public JAXBContext getContext(Class<?> type) {
    if (context == null) {
      try {
        context = JAXBContext.newInstance("resttest.jaxb");
      } catch (JAXBException e) {
        throw new RuntimeException(e);
      }
    }
    return context;
  }
}

This ContextResolver is registered in the rest client with:

client = ClientBuilder.newClient().register(MoxyXmlFeature.class).register(MyJaxbContextProvider.class);

My Customer entity is :

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "id",
    "firstname",
    "lastname",
    "street",
    "city"
})
@XmlRootElement(name = "CUSTOMER")
public class Customer {
  @XmlElement(name = "ID")
  protected Integer id;

  @XmlElement(name = "FIRSTNAME")
  protected String firstName;

  @XmlElement(name = "LASTNAME")
  protected String lastName;

  @XmlElement(name = "STREET")
  protected String street;

  @XmlElement(name = "CITY")
  protected String city;

  // getters and setters following
  // ...
}

And finally the test class making the actual requests is:

public class RestClientTest {
  private static Client client;

  @BeforeClass
  public static void beforeClass() {
    client = ClientBuilder.newClient().register(MoxyXmlFeature.class).register(MyJaxbContextProvider.class);
  }

  @Test
  public void testCreateCustomerWithEntity() { // Error
    Customer customer = new Customer();
    customer.setId(50);
    customer.setFirstName("Nikol");

    Response res = client.target("http://www.thomas-bayer.com/sqlrest/CUSTOMER/").request()
        .post(entity(customer, MediaType.APPLICATION_XML_TYPE));

  }

  @Test
  public void testGetCustomer() { // Error
    Customer customer = client.target("http://www.thomas-bayer.com/sqlrest/CUSTOMER/3/").request()
        .get(new GenericType<Customer>() {});

    assertThat(customer.getId(), equalTo(3));
  }
}

I have packed these files in a resttest project at https://github.com/georgeyanev/resttest
After cloning the tests can be executed simply with

mvn test

I expect when I'm making a POST requests and passing a Customer instance the latter to be marshalled by the jersey client (testCreateCustomerWithEntity).
And when I'm making a GET request the returned Customer entity to be unmarshalled (testGetCustomer).
But both tests fail with MessageBodyProviderNotFoundException saying that there is no MessageBodyWriter/MessageBodyReader found for media type application/xml and type Customer.

I'm using 2.19 version of both jersey-client and jersey-media-moxy libraries with oracle java 1.8.0_25

What could be the possible reason for this?

Answer 1

It appears that an additional dependency for jersey-media-jaxb is needed in order for the custom ContextResolver to be picked by jersey. Then the standard JAXB mechanisms are used to define the JAXBContextFactory from which a JAXBContext instance would be obtained.
In this case the JAXBContextFactory class is specified in jaxb.properties file in resttest.jaxb package.