void SaveDoc(DBClientConnection &conn)
  {

    b.append("data", data);
    BSONObj p = b.obj();

    if (conn.isFailed()==false){
        try{
            conn.insert("db.collection",p);
           } catch (std::exception& e)
            {
                std::cerr << "Exception occured while inserting log: " << e.what() << "\n";
            }
      } else {
         cout<<"Not connected to DB!"<<endl;
         try{
          cout<<"Trying to re-connect to DB"<<endl;
          conn.connect("localhost");          }
          catch (std::exception& e)
            {
               cout<< "Exception found while reconnecting: " << e.what() << "\n";
            }
    }
}