- for (Object instance : instances) {
- INeutronFloatingIPAware service = (INeutronFloatingIPAware) instance;
- int status = service.canUpdateFloatingIP(singleton, target);
- if (status < 200 || status > 299)
- return Response.status(status).build();
+ if (instances.length > 0) {
+ for (Object instance : instances) {
+ INeutronFloatingIPAware service = (INeutronFloatingIPAware) instance;
+ int status = service.canUpdateFloatingIP(singleton, target);
+ if (status < 200 || status > 299)
+ return Response.status(status).build();
+ }
+ } else {
+ throw new ServiceUnavailableException("No providers registered. Please try again later");