Jersey Exception mappers not working when jackson deserialization fails

Question

I am using Jersey 2.10 with Jackson serialization/deserialization feature in my REST API.

My idea is to make my REST API to always return a standard JSON error resp

Answer 1

I used "jackson-jaxrs-json-provider 2.8.8" and JAX-RS 2.0

Application class - you needs to register your ExceptionMapper implementation class:

@ApplicationPath("pathApplication")
public class ApplicationConfiguration extends Application{


   @Override
   public Set> getClasses() {

      Set> resources = new HashSet<>();
      resources.add(YourJAXRSClass.class);
      resources.add(JsonJacksonEM.class); //ExceptionMapper class implementation
      //others resources that you need...
      return resources; 

   }


}

ExceptionMapper class implementation:

@Provider
public class JsonJacksonEM implements ExceptionMapper{


   @Override
   public Response toResponse(JsonParseException exception) {
      //you can return a Response in the way that you want!
      return Response.ok(new YourObject()).build();
   }


}