DataAccessExceptionMapper.java

package ungp.sampleng.backend.exception;

import org.springframework.dao.DataAccessException;

import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;

@Provider
public class DataAccessExceptionMapper implements ExceptionMapper<DataAccessException> {

    @Override
    public Response toResponse(DataAccessException e) {
        return Response.status(Response.Status.INTERNAL_SERVER_ERROR).
                entity(e.getMessage()).
                type("text/plain").
                build();
    }
}