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-// -*- C++ -*-
-
-//=============================================================================
-/**
- * @file Caching_Utility_T.h
- *
- * $Id$
- *
- * @author Kirthika Parameswaran <kirthika@cs.wustl.edu>
- */
-//=============================================================================
-
-#ifndef ACE_CACHING_UTILITY_H
-#define ACE_CACHING_UTILITY_H
-
-#include /**/ "ace/pre.h"
-
-#include "ace/config-all.h"
-
-#if !defined (ACE_LACKS_PRAGMA_ONCE)
-# pragma once
-#endif /* ACE_LACKS_PRAGMA_ONCE */
-
-#include "ace/Global_Macros.h"
-#include "ace/Cleanup_Strategies_T.h"
-
-// For linkers that cant grok long names.
-#define ACE_Pair_Caching_Utility APUTIL
-
-ACE_BEGIN_VERSIONED_NAMESPACE_DECL
-
-/**
- * @class ACE_Pair_Caching_Utility
- *
- * @brief Defines a helper class for the Caching Strategies.
- *
- * This class defines the methods commonly used by the different
- * caching strategies. For instance: <clear_cache> method which
- * decides and purges the entry from the container. @note This
- * class helps in the caching_strategies using a container
- * containing entries of <KEY, ACE_Pair<VALUE, attributes>>
- * kind. The attributes helps in deciding the entries to be
- * purged. The Cleanup_Strategy is the callback class to which the
- * entries to be cleaned up will be delegated.
- */
-template <class KEY, class VALUE, class CONTAINER, class ITERATOR, class ATTRIBUTES>
-class ACE_Pair_Caching_Utility
-{
-public:
-
- typedef ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> CLEANUP_STRATEGY;
-
- /// Constructor.
- ACE_Pair_Caching_Utility (ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> *cleanup_strategy = 0,
- int delete_cleanup_strategy = 0);
-
- /// Destructor.
- ~ACE_Pair_Caching_Utility (void);
-
- /**
- * Purge entries from the <container>. The Cleanup_Strategy will do the actual
- * job of cleanup once the entries to be cleaned up are decided.
- */
- int clear_cache (CONTAINER &container,
- double purge_percent);
-
-protected:
-
- /// Find the entry with minimum caching attributes.
- void minimum (CONTAINER &container,
- KEY *&key_to_remove,
- VALUE *&value_to_remove);
-
- /// The cleanup strategy which can be used to destroy the entries of
- /// the container.
- CLEANUP_STRATEGY *cleanup_strategy_;
-
- /// Whether the cleanup_strategy should be destroyed or not.
- int delete_cleanup_strategy_;
-
- ACE_UNIMPLEMENTED_FUNC (void operator= (const ACE_Pair_Caching_Utility<KEY,VALUE,CONTAINER,ITERATOR,ATTRIBUTES> &))
- ACE_UNIMPLEMENTED_FUNC (ACE_Pair_Caching_Utility (const ACE_Pair_Caching_Utility<KEY,VALUE,CONTAINER,ITERATOR,ATTRIBUTES> &))
-};
-
-////////////////////////////////////////////////////////////////////////////////
-#define ACE_Recyclable_Handler_Caching_Utility ARHUTIL
-
-/**
- * @class ACE_Recyclable_Handler_Caching_Utility
- *
- * @brief Defines a helper class for the Caching Strategies.
- *
- * This class defines the methods commonly used by the different
- * caching strategies. For instance: <clear_cache> method which
- * decides and purges the entry from the container. @note This
- * class helps in the caching_strategies using a container
- * containing entries of <KEY, Svc_Handler> kind. The attributes
- * helps in deciding the entries to be purged. The
- * Cleanup_Strategy is the callback class to which the entries to
- * be cleaned up will be delegated.
- */
-template <class KEY, class VALUE, class CONTAINER, class ITERATOR, class ATTRIBUTES>
-class ACE_Recyclable_Handler_Caching_Utility
-{
-
-public:
-
- typedef ACE_Recyclable_Handler_Cleanup_Strategy<KEY, VALUE, CONTAINER> CLEANUP_STRATEGY;
- typedef ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> CLEANUP_STRATEGY_BASE;
-
- /// Constructor.
- ACE_Recyclable_Handler_Caching_Utility (ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> *cleanup_strategy = 0,
- int delete_cleanup_strategy = 0);
-
- /// Destructor.
- ~ACE_Recyclable_Handler_Caching_Utility (void);
-
- /**
- * Purge entries from the <container>. The Cleanup_Strategy will do
- * the actual job of cleanup once the entries to be cleaned up are
- * decided.
- */
- int clear_cache (CONTAINER &container,
- double purge_percent);
-
-protected:
-
- /// Find the entry with minimum caching attributes.
- void minimum (CONTAINER &container,
- KEY *&key_to_remove,
- VALUE *&value_to_remove);
-
- /// This is the default Cleanup Strategy for this utility.
- CLEANUP_STRATEGY_BASE *cleanup_strategy_;
-
- /// Whether the cleanup_strategy should be destroyed or not.
- int delete_cleanup_strategy_;
-
-private:
- ACE_UNIMPLEMENTED_FUNC (void operator= (const ACE_Recyclable_Handler_Caching_Utility<KEY,VALUE,CONTAINER,ITERATOR,ATTRIBUTES> &))
- ACE_UNIMPLEMENTED_FUNC (ACE_Recyclable_Handler_Caching_Utility (const ACE_Recyclable_Handler_Caching_Utility<KEY,VALUE,CONTAINER,ITERATOR,ATTRIBUTES> &))
-};
-
-///////////////////////////////////////////////////////////////////////////
-#define ACE_Refcounted_Recyclable_Handler_Caching_Utility ARRHUTIL
-
-/**
- * @class ACE_Refcounted_Recyclable_Handler_Caching_Utility
- *
- * @brief Defines a helper class for the Caching Strategies.
- *
- * This class defines the methods commonly used by the different
- * caching strategies. For instance: clear_cache () method which
- * decides and purges the entry from the container. @note This
- * class helps in the caching_strategies using a container
- * containing entries of <Refcounted_KEY,
- * Recyclable_Connection_Handler> kind. The attributes helps in
- * deciding the entries to be purged. The Cleanup_Strategy is the
- * callback class to which the entries to be cleaned up will be
- * delegated.
- */
-template <class KEY, class VALUE, class CONTAINER, class ITERATOR, class ATTRIBUTES>
-class ACE_Refcounted_Recyclable_Handler_Caching_Utility
-{
-
-public:
-
- typedef ACE_Refcounted_Recyclable_Handler_Cleanup_Strategy<KEY, VALUE, CONTAINER> CLEANUP_STRATEGY;
- typedef ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> CLEANUP_STRATEGY_BASE;
-
- /// Constructor.
- ACE_Refcounted_Recyclable_Handler_Caching_Utility (ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> *cleanup_strategy = 0,
- int delete_cleanup_strategy = 0);
-
- /// Destructor.
- ~ACE_Refcounted_Recyclable_Handler_Caching_Utility (void);
-
- /**
- * Purge entries from the <container>. The Cleanup_Strategy will do
- * the actual job of cleanup once the entries to be cleaned up are
- * decided.
- */
- int clear_cache (CONTAINER &container,
- double purge_percent);
-
-protected:
-
- /// Find the entry with minimum caching attributes.
- void minimum (CONTAINER &container,
- KEY *&key_to_remove,
- VALUE *&value_to_remove);
-
- /// This is the default Cleanup Strategy for this utility.
- CLEANUP_STRATEGY_BASE *cleanup_strategy_;
-
- /// Whether the cleanup_strategy should be destroyed or not.
- int delete_cleanup_strategy_;
-
- /**
- * This figure denotes the number of entries are there in the
- * container which have been marked as closed already but might
- * not have been unbound from the container.
- */
- size_t marked_as_closed_entries_;
-
-private:
- ACE_UNIMPLEMENTED_FUNC (void operator= (const ACE_Refcounted_Recyclable_Handler_Caching_Utility<KEY,VALUE,CONTAINER,ITERATOR,ATTRIBUTES> &))
- ACE_UNIMPLEMENTED_FUNC (ACE_Refcounted_Recyclable_Handler_Caching_Utility (const ACE_Refcounted_Recyclable_Handler_Caching_Utility<KEY,VALUE,CONTAINER,ITERATOR,ATTRIBUTES> &))
-};
-
-////////////////////////////////////////////////////////////////////////////////////////
-
-/**
- * @class ACE_Handler_Caching_Utility
- *
- * @brief Defines a helper class for the Caching Strategies.
- *
- * This class defines the methods commonly used by the different
- * caching strategies. For instance: <clear_cache> method which
- * decides and purges the entry from the container. @note This
- * class helps in the caching_strategies using a container
- * containing entries of <KEY, HANDLER> kind where the HANDLER
- * contains the caching attributes which help in deciding the
- * entries to be purged. The Cleanup_Strategy is the callback
- * class to which the entries to be cleaned up will be delegated.
- */
-template <class KEY, class VALUE, class CONTAINER, class ITERATOR, class ATTRIBUTES>
-class ACE_Handler_Caching_Utility
-{
-public:
-
- typedef ACE_Handler_Cleanup_Strategy<KEY, VALUE, CONTAINER> CLEANUP_STRATEGY;
- typedef ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> CLEANUP_STRATEGY_BASE;
-
- /// Constructor.
- ACE_Handler_Caching_Utility (ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> *cleanup_strategy = 0,
- int delete_cleanup_strategy = 0);
-
- /// Destructor.
- ~ACE_Handler_Caching_Utility (void);
-
- /**
- * Purge entries from the <container>. The Cleanup_Strategy will do
- * the actual job of cleanup once the entries to be cleaned up are
- * decided.
- */
- int clear_cache (CONTAINER &container,
- double purge_percent);
-
-protected:
-
- /**
- * Find the entry with minimum caching attributes. This is handler
- * specific since this utility is to be used very specifically for
- * handler who have caching_attributes for server side acched
- * connection management.
- */
- void minimum (CONTAINER &container,
- KEY *&key_to_remove,
- VALUE *&value_to_remove);
-
- /// The cleanup strategy which can be used to destroy the entries of
- /// the container.
- CLEANUP_STRATEGY_BASE *cleanup_strategy_;
-
- /// Whether the cleanup_strategy should be destroyed or not.
- int delete_cleanup_strategy_;
-
-private:
- ACE_UNIMPLEMENTED_FUNC (void operator= (const ACE_Handler_Caching_Utility<KEY,VALUE,CONTAINER,ITERATOR,ATTRIBUTES> &))
- ACE_UNIMPLEMENTED_FUNC (ACE_Handler_Caching_Utility (const ACE_Handler_Caching_Utility<KEY,VALUE,CONTAINER,ITERATOR,ATTRIBUTES> &))
-};
-
-///////////////////////////////////////////////////////////////////////////
-#define ACE_Null_Caching_Utility ANUTIL
-/**
- * @class ACE_Null_Caching_Utility
- *
- * @brief Defines a dummy helper class for the Caching Strategies.
- *
- * This class defines the methods commonly used by the different
- * caching strategies. For instance: <clear_cache> method which
- * decides and purges the entry from the container. @note This
- * class is be used with the Null_Caching_Strategy. The
- * Cleanup_Strategy is the callback class to which the entries to
- * be cleaned up will be delegated.
- */
-template <class KEY, class VALUE, class CONTAINER, class ITERATOR, class ATTRIBUTES>
-class ACE_Null_Caching_Utility
-{
-public:
-
- typedef ACE_Null_Cleanup_Strategy<KEY, VALUE, CONTAINER> CLEANUP_STRATEGY;
- typedef ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> CLEANUP_STRATEGY_BASE;
-
- /// Constructor.
- ACE_Null_Caching_Utility (ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> *cleanup_strategy = 0,
- int delete_cleanup_strategy = 0);
-
- /// Destructor.
- ~ACE_Null_Caching_Utility (void);
-
- /**
- * Purge entries from the <container>. The Cleanup_Strategy will do
- * the actual job of cleanup once the entries to be cleaned up are
- * decided. @note Here it is a no-op.
- */
- int clear_cache (CONTAINER &container,
- double purge_percent);
-
-protected:
-
- /**
- * Find the entry with minimum caching attributes. This is handler
- * specific since this utility is to be used very specifically for
- * handler who have caching_attributes for server side acched
- * connection management.@note Here it is a no-op.
- */
- void minimum (CONTAINER &container,
- KEY *&key_to_remove,
- VALUE *&value_to_remove);
-
- /// The cleanup strategy which can be used to destroy the entries of
- /// the container.
- CLEANUP_STRATEGY_BASE *cleanup_strategy_;
-
- /// Whether the cleanup_strategy should be destroyed or not.
- int delete_cleanup_strategy_;
-
-private:
- ACE_UNIMPLEMENTED_FUNC (void operator= (const ACE_Null_Caching_Utility<KEY,VALUE,CONTAINER,ITERATOR,ATTRIBUTES> &))
- ACE_UNIMPLEMENTED_FUNC (ACE_Null_Caching_Utility (const ACE_Null_Caching_Utility<KEY,VALUE,CONTAINER,ITERATOR,ATTRIBUTES> &))
-};
-
-ACE_END_VERSIONED_NAMESPACE_DECL
-
-#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
-#include "ace/Caching_Utility_T.cpp"
-#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
-
-#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
-#pragma implementation ("Caching_Utility_T.cpp")
-#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
-
-#include /**/ "ace/post.h"
-
-#endif /* ACE_CACHING_UTILITY_H */