TAO/tao/Strategies/FIFO_Connection_Purging_Strategy.h

   1 // -*- C++ -*-
   2
   3 // ================================================================
   4 /**
   5  *  @file   FIFO_Connection_Purging_Strategy.h
   6  *
   7  *  @author Chad Elliott (elliott_c@ociweb.com)
   8  */
   9 // ================================================================
  10
  11 #ifndef TAO_FIFO_PURGING_STRATEGY_H
  12 #define TAO_FIFO_PURGING_STRATEGY_H
  13 #include /**/ "ace/pre.h"
  14
  15 #include "tao/Strategies/strategies_export.h"
  16 #include "tao/Connection_Purging_Strategy.h"
  17
  18 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  19 # pragma once
  20 #endif /* ACE_LACKS_PRAGMA_ONCE */
  21
  22 // ****************************************************************
  23
  24 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
  25
  26 /**
  27  * @class TAO_FIFO_Connection_Purging_Strategy
  28  *
  29  * @brief The First In First Out connection purging strategy
  30  *
  31  * This class maintains it's own count which is only applied to the
  32  * item passed if it has not yet been cached.  This way, each successive
  33  * transport has a larger ordering number than the previous.  This will
  34  * cause the first transport to be purged first.
  35  */
  36 class TAO_Strategies_Export TAO_FIFO_Connection_Purging_Strategy:
  37                             public TAO_Connection_Purging_Strategy
  38 {
  39 public:
  40   /// The constructor
  41   TAO_FIFO_Connection_Purging_Strategy (int cache_maximum);
  42
  43   /// Called when accessing an item from the cache
  44   virtual void update_item (TAO_Transport& transport);
  45
  46 private:
  47   /// The ordering information for each transport in the cache
  48   unsigned long order_;
  49 };
  50
  51 TAO_END_VERSIONED_NAMESPACE_DECL
  52
  53 #include /**/ "ace/post.h"
  54 #endif /* TAO_FIFO_PURGING_STRATEGY_H */