泽西岛自定义例外消息

Question

I've written a Jersey Server application and a Client application which is consuming the provided REST Services. But I've problems to pass exception messages from server to client. Currently I've implemented it like:

Server WS Method:

@GET
@Path("/test")
@Produces(MediaType.APPLICATION_JSON + ";charset=utf-8")
public TestModel doTest(){
    throw new NotImplementedException("[doTest] is not implemented yet");
}

NotImplementedException:

public class NotImplementedException extends WebApplicationException{
        public NotImplementedException(){
             super(Response.status(Response.Status.NOT_IMPLEMENTED)
                     .entity("The operation you've called is not implemented yet").type(MediaType.APPLICATION_JSON).build());
        }

        public NotImplementedException(String message){
             super(Response.status(Response.Status.BAD_GATEWAY).entity(message).type(MediaType.APPLICATION_JSON).build());
        }
    }

Client:

public static TestModel doTest() throws Exception{
        try {
            Client client = getClient();

            WebTarget webTarget = client.target("server..../");
            WebTarget getGuTarget = webTarget.path("test");

            Invocation.Builder ib = getGuTarget.request(MediaType.APPLICATION_JSON);


            TestModel response = ib.get(TestModel.class); //here exception is thorwn
            return response;
        } catch (Exception e) {
            throw e;
        }
    }

The exception caught on the Client looks like:

javax.ws.rs.ServerErrorException: HTTP 502 Bad Gateway
    at org.glassfish.jersey.client.JerseyInvocation.createExceptionForFamily(JerseyInvocation.java:1029)
    at org.glassfish.jersey.client.JerseyInvocation.convertToException(JerseyInvocation.java:1009)
    at org.glassfish.jersey.client.JerseyInvocation.translate(JerseyInvocation.java:799)
    at org.glassfish.jersey.client.JerseyInvocation.access$500(JerseyInvocation.java:91)

Unfortunately I'm not able to receive the "[doTest] is not implemented yet" Message on the client. How I can get this message?

When I test the webservice I receive the correct message in the body. Unfortunately I don't know how I can access it via jersey?

Thanks.

Answer 1

You can use an ExceptionMapper for custom exceptions: https://jersey.java.net/apidocs/2.11/jersey/javax/ws/rs/ext/ExceptionMapper.html

Otherwise, Jersey tries to map exceptions as good as it can on its own.