ResponseExceptionMapper in cxf client

Question

I am trying to handle exceptions using the ResponseExceptionMapper class for my cxf client.

ExceptionHandlingCode:

public class MyServiceRestExceptionMapper implements ResponseExceptionMapper<Exception> {


private static final Logger LOGGER = LoggerFactory.getLogger(MyServiceRestExceptionMapper .class);

public MyServiceRestExceptionMapper () {
}

@Override
public Exception fromResponse(Response response) {

    LOGGER.info("Executing MyServiceRestExceptionMapper class");

    Response.Status status = Response.Status.fromStatusCode(response.getStatus());

    LOGGER.info("Status: ", status.getStatusCode());

    switch (status) {

        case BAD_REQUEST:
            throw new InvalidServiceRequestException(response.getHeaderString("exception"));

        case UNAUTHORIZED:
            throw new AuthorizationException(response.getHeaderString("exception"));

        case FORBIDDEN:
            throw new  AuthorizationException(response.getHeaderString("exception"));

        case NOT_FOUND:
            throw new
                    EmptyResultDataAccessException(response.getHeaderString("exception"));

        default:
            throw new InvalidServiceRequestException(response.getHeaderString("exception"));

    }

}

}

CXF Client Code:

String url1= 
WebClient client = createWebClient(url1).path(/document);
client.headers(someHeaders);
Response response = client.post(byteArry);

For success scenarios, I am getting the correct response code of 200, but for failure scenarios, I never get a response code.

Also is there a better way of handling exceptions in cxf client.

Could someone please help on this.

Answer 1

How have you registered the ResponseExceptionMapper to the WebClient?

You need something like this

List<Object> providers = new ArrayList<Object>();
providers.add(new MyServiceRestExceptionMapper() 
WebClient client = WebClient.create(url, providers);

I suggest to use a WebApplicationException insteadof Exception because default behaviour will raise this kind of exception if no ResponseExceptionMapper is registered. Also, return the exception, do not throw it. The exception mapper should looks like this.

public class MyServiceRestExceptionMapper implements ResponseExceptionMapper<WebApplicationException>

    public MyServiceRestExceptionMapper () {
    }

    @Override
    public WebApplicationException fromResponse(Response response) {
         //Create your custom exception with status code
         WebApplicationException ex = ...

         return ex;
    }
}