How to catch RESTEasy Bean Validation Errors?

Question

I am developing a simple RESTFul service using JBoss-7.1 and RESTEasy. I have a REST Service, called CustomerService as follows:

@Path(value=\"/customers\")
         


        

Answer 1

You should use exception mapper. Example:

@Provider
public class ValidationExceptionMapper implements ExceptionMapper<javax.validation.ConstraintViolationException> {

    public Response toResponse(javax.validation.ConstraintViolationException cex) {
       Error error = new Error();
       error.setMessage("Whatever message you want to send to user. " + cex);
       return Response.entity(error).status(400).build(); //400 - bad request seems to be good choice
    }
}

where Error could be something like:

@XmlRootElement
public class Error{
   private String message;
   //getter and setter for message field
}

Then you'll get error message wrapped into XML.