public static String findRevisionByTitleAndUser(String title, String user)
     throws ClientHandlerException, UniformInterfaceException, JSONException {
   String revInfoByTitleAndUser = QueryNodeNumber.getRevisonByTitleAndUser(title, user);
   return revInfoByTitleAndUser;
 }
 public static String findRevisionInfoByRevid(String revid)
     throws ClientHandlerException, UniformInterfaceException, JSONException {
   String revInfo = QueryNodeNumber.getRevisonInfoByRevid(revid);
   return revInfo;
 }
 public static String findArticleLatestInfo(String title)
     throws ClientHandlerException, UniformInterfaceException, JSONException {
   String revisionLatestEdit = QueryNodeNumber.getArticleLatestEdit(title);
   return revisionLatestEdit;
 }
 public static String findUserLastestInfo(String user)
     throws ClientHandlerException, UniformInterfaceException, JSONException, IOException {
   String userLatestEdit = QueryNodeNumber.getUserLatestEdit(user);
   return userLatestEdit;
 }
 public static ArrayList<String> findUserByRevid(String revid)
     throws ClientHandlerException, UniformInterfaceException, JSONException {
   ArrayList<String> userList = QueryNodeNumber.findUserInfoByRevid(revid);
   return userList;
 }
 public static String findNodeNumberByUserName(String user) {
   String nodeNumber = QueryNodeNumber.findNodeNumberByUser(user);
   return nodeNumber;
 }