M2 certificate response entity

application/module-certificate/src/main/java/org/fuseri/modulecertificate/service/CertificateService.java

@@ -4,8 +4,10 @@ import org.fuseri.modulecertificate.Certificate;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
+import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.server.ResponseStatusException;
 
 import java.util.List;
 
@@ -22,7 +24,7 @@ public class CertificateService {
     @Transactional(readOnly = true)
     public Certificate findById(Long id) {
         return certificateRepository.findById(id)
-                .orElseThrow(() -> new ResourceNotFoundException("Certificate with id: " + id + " was not found."));
+                .orElseThrow(() -> new ResponseStatusException(HttpStatus.NOT_FOUND, "Certificate with id: " + id + " was not found."));
     }
 
     @Transactional(readOnly = true)