NAME

ACE_Null_Caching_Utility - Defines a dummy helper class for the Caching Strategies.

SYNOPSIS

#include <ace/Caching_Utility_T.h>

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; ACE_Null_Caching_Utility ( ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> *cleanup_strategy = 0, int delete_cleanup_strategy = 0 ); ~ACE_Null_Caching_Utility (void); int clear_cache (CONTAINER &container, double purge_percent); protected: void minimum ( CONTAINER &container, KEY *&key_to_remove, VALUE *&value_to_remove ); CLEANUP_STRATEGY_BASE *cleanup_strategy_; int delete_cleanup_strategy_; };

DESCRIPTION

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.

PUBLIC MEMBERS

    typedef ACE_Null_Cleanup_Strategy<KEY, VALUE, CONTAINER> CLEANUP_STRATEGY;
    

    typedef ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> CLEANUP_STRATEGY_BASE;
    

ACE_Null_Caching_Utility (
    ACE_Cleanup_Strategy<KEY, VALUE, CONTAINER> *cleanup_strategy = 0,
    int delete_cleanup_strategy = 0
    );

~ACE_Null_Caching_Utility (void);

int clear_cache (CONTAINER &container, double purge_percent);

PROTECTED MEMBERS

void minimum (
    CONTAINER &container,
    KEY *&key_to_remove,
    VALUE *&value_to_remove
    );

CLEANUP_STRATEGY_BASE *cleanup_strategy_;

int delete_cleanup_strategy_;

AUTHOR

Kirthika Parameswaran kirthika@cs.wustl.edu

LIBRARY

ace