NAME

ACE_FIFO_Caching_Strategy - The First In First Out strategy is implemented wherein each item is ordered.

SYNOPSIS

#include <ace/Caching_Strategies_T.h>

template<class ATTRIBUTES, class CACHING_UTILITY> class ACE_FIFO_Caching_Strategy { public: typedef ATTRIBUTES CACHING_ATTRIBUTES; ACE_FIFO_Caching_Strategy (void); ATTRIBUTES attributes (void); double purge_percent (void); void purge_percent (double percentage); int notify_bind (int result, const ATTRIBUTES &attr); int notify_find (int result, ATTRIBUTES &attr); int notify_unbind (int result, const ATTRIBUTES &attr); int notify_trybind (int result, ATTRIBUTES &attr); int notify_rebind (int result, const ATTRIBUTES &attr); CACHING_UTILITY &caching_utility (void); void dump (void) const; private: ATTRIBUTES order_; double purge_percent_; CACHING_UTILITY caching_utility_; };

DESCRIPTION

The order tag of each item is used to decide the item to be removed from the cache. The items with least order are removed.

Explanation of the template parameter list: CONTAINER is any map with entries of type KEY, VALUE. The ATTRIBUTES are the deciding factor for purging of entries and should logically be included with the VALUE. Some ways of doing this are: As being a member of the VALUE or VALUE being ACE_Pairx, ATTRIBUTES. The CACHING_UTILITY is the class which can be plugged in and which decides the entries to purge.

Initialisation and termination.

ACE_FIFO_Caching_Strategy (void);

Strategy methods.

ATTRIBUTES attributes (void);

Accessor methods for the percentage of entries to purge.

double purge_percent (void);

void purge_percent (double percentage);

= Strategy related Operations

int notify_bind (int result, const ATTRIBUTES &attr);

int notify_find (int result, ATTRIBUTES &attr);

int notify_unbind (int result, const ATTRIBUTES &attr);

int notify_trybind (int result, ATTRIBUTES &attr);

int notify_rebind (int result, const ATTRIBUTES &attr);

CACHING_UTILITY &caching_utility (void);

void dump (void) const;

AUTHOR

Kirthika Parameswaran kirthika@cs.wustl.edu

LIBRARY

ace