code: protected String parseStoreName(String requestURI) {
          String storeName = null;
          String[] parts = requestURI.split("/");
          if(parts.length > 1) {
              storeName = parts[1];
          }
          return storeName;
      }
docs: Parses the store name HTTP request URI. The URI must be of the format
  /<store_name>/<key>[,<key>,...]
  
  @param requestURI
  @return a String representing store name