TAO/orbsvcs/examples/FaultTolerance/RolyPoly/LogStdMap.h

   1 // file      : RolyPoly/LogStdMap.h
   2 // author    : Boris Kolpackov <boris@dre.vanderbilt.edu>
   3 #ifndef LOG_STD_MAP_H
   4 #define LOG_STD_MAP_H
   5
   6 #include <map>
   7
   8 template <typename RI, typename RV>
   9 class Log
  10 {
  11 public:
  12   typedef RI RecordIdType;
  13   typedef RV RecordValueType;
  14
  15 private:
  16   typedef
  17   std::map <RecordIdType, RecordValueType>
  18   Map_;
  19
  20 public:
  21   class Duplicate {};
  22   class NotFound {};
  23
  24   void
  25   insert (RecordIdType const& ri, RecordValueType const& rv)
  26   {
  27     if (!map_.insert (std::make_pair (ri, rv)).second)
  28     {
  29       throw Duplicate ();
  30     }
  31   }
  32
  33   bool
  34   contains (RecordIdType const& ri) const
  35   {
  36     return map_.count (ri) != 0;
  37   }
  38
  39
  40   RecordValueType const&
  41   lookup (RecordIdType const& ri) const
  42   {
  43     typename Map_::const_iterator i = map_.find (ri);
  44
  45     if (i != map_.end ()) return i->second;
  46     else throw NotFound ();
  47   }
  48
  49 private:
  50   Map_ map_;
  51 };
  52
  53 #endif // LOG_STD_MAP_H