docs: @Override
      public URL select(List<URL> urls, String requestKey) {
      	// search for a URL in the same ip first
          List<URL> localUrls = searchLocalUrls(urls, ip);
          if(localUrls.size() > 0) {
               if(localUrls.size() == 1) {
                   return localUrls.get(0);
               } else {
                  // round robin within localUrls
                   return doSelect(localUrls);
               }
          } else {
              // round robin within urls
              return doSelect(urls);
          }
      }