private ServiceInfo getRandomService(List<ServiceInfo> serviceList) {
        if (serviceList == null || serviceList.size() == 0) {
            return null;
        }
        return serviceList.get(RandomUtils.nextInt(0, serviceList.size()));
    }
private ServiceInfo getRandomService ( List < ServiceInfo > serviceList ) { if ( serviceList == null || serviceList . size ( ) == 0 ) { return null ; } return serviceList . get ( RandomUtils . nextInt ( 0 , serviceList . size ( ) ) ) ; }
get a random service

@param serviceList
@return