#include <Caching_Strategies_T.h>
Public Types | |
typedef ATTRIBUTES | CACHING_ATTRIBUTES |
Public Member Functions | |
ACE_LRU_Caching_Strategy (void) | |
ATTRIBUTES | attributes (void) |
Accessor method for the timer attributes. | |
double | purge_percent (void) |
Get the percentage of entries to purge. | |
void | purge_percent (double percentage) |
Set the percentage of entries to purge. | |
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) |
Purge the cache. | |
void | dump (void) const |
Dumps the state of the object. | |
Private Attributes | |
ATTRIBUTES | timer_ |
double | purge_percent_ |
The level about which the purging will happen automagically. | |
CACHING_UTILITY | caching_utility_ |
This is a strategy which makes use of a virtual timer which is updated whenever an item is inserted or looked up in the container. When the need of purging entries arises, the items with the lowest timer values 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_Pair<x, ATTRIBUTES>. The CACHING_UTILITY is the class which can be plugged in and which decides the entries to purge.
typedef ATTRIBUTES ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::CACHING_ATTRIBUTES |
ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::ACE_LRU_Caching_Strategy | ( | void | ) | [inline] |
The <container> is the map in which the entries reside. The timer attribute is initialed to zero in this constructor. And the <purge_percent> field denotes the percentage of the entries in the cache which can be purged automagically and by default is set to 10%.
ATTRIBUTES ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::attributes | ( | void | ) | [inline] |
Accessor method for the timer attributes.
CACHING_UTILITY & ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::caching_utility | ( | void | ) | [inline] |
Purge the cache.
void ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::dump | ( | void | ) | const [inline] |
Dumps the state of the object.
int ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::notify_bind | ( | int | result, | |
const ATTRIBUTES & | attr | |||
) | [inline] |
This method acts as a notification about the CONTAINERs bind method call.
int ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::notify_find | ( | int | result, | |
ATTRIBUTES & | attr | |||
) | [inline] |
This method acts as a notification about the CONTAINERs find method call
int ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::notify_rebind | ( | int | result, | |
const ATTRIBUTES & | attr | |||
) | [inline] |
This method acts as a notification about the CONTAINERs rebind method call
int ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::notify_trybind | ( | int | result, | |
ATTRIBUTES & | attr | |||
) | [inline] |
This method acts as a notification about the CONTAINERs trybind method call
int ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::notify_unbind | ( | int | result, | |
const ATTRIBUTES & | attr | |||
) | [inline] |
This method acts as a notification about the CONTAINERs unbind method call
void ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::purge_percent | ( | double | percentage | ) | [inline] |
Set the percentage of entries to purge.
double ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::purge_percent | ( | void | ) | [inline] |
Get the percentage of entries to purge.
CACHING_UTILITY ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::caching_utility_ [private] |
This is the helper class which will decide and expunge entries from the cache.
double ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::purge_percent_ [private] |
The level about which the purging will happen automagically.
ATTRIBUTES ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::timer_ [private] |
This element is the one which is the deciding factor for purging of an ITEM.