code: private List<String> extractRequiredParamsInURI(String uri) {
  	    List<String> matchList = new ArrayList<String>();
  	    Pattern regex = Pattern.compile("\\{(.*?)\\}");
  	    Matcher regexMatcher = regex.matcher(uri);
          while (regexMatcher.find()) {
            matchList.add(regexMatcher.group(1));
          }
          return matchList;
      }
docs: Extract Required Params In URI
  @param uri
  @return the list of required params