TAO/tao/LRU_Connection_Purging_Strategy.h

   1 // -*- C++ -*-
   2
   3 // ================================================================
   4 /**
   5  *  @file   LRU_Connection_Purging_Strategy.h
   6  *
   7  *  @author Chad Elliott (elliott_c@ociweb.com)
   8  */
   9 // ================================================================
  10
  11 #ifndef TAO_LRU_PURGING_STRATEGY_H
  12 #define TAO_LRU_PURGING_STRATEGY_H
  13
  14 #include /**/ "ace/pre.h"
  15
  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_LRU_Connection_Purging_Strategy
  28  *
  29  * @brief The Least Recently Used connection purging strategy
  30  *
  31  * This class maintains it's own count which is applied to the
  32  * item passed in.  This way, the least recently used transport
  33  * has the smallest ordering number and will therefore be purged
  34  * first.
  35  */
  36 class TAO_Export TAO_LRU_Connection_Purging_Strategy
  37   : public TAO_Connection_Purging_Strategy
  38 {
  39 public:
  40   /// The constructor
  41   TAO_LRU_Connection_Purging_Strategy (int cache_maximum);
  42
  43   /// The destructor
  44   virtual ~TAO_LRU_Connection_Purging_Strategy ();
  45
  46   /// Called when accessing an item from the cache
  47   virtual void update_item (TAO_Transport& transport);
  48
  49 private:
  50   /// The ordering information for each transport in the cache
  51   unsigned long order_;
  52 };
  53
  54 TAO_END_VERSIONED_NAMESPACE_DECL
  55
  56 #include /**/ "ace/post.h"
  57
  58 #endif /* TAO_LRU_PURGING_STRATEGY_H */