#include <Caching_Strategies_T.h>
Collaboration diagram for ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >:
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.
Definition at line 199 of file Caching_Strategies_T.h.
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Definition at line 204 of file Caching_Strategies_T.h. |
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The is the map in which the entries reside. The timer attribute is initialed to zero in this constructor. And the field denotes the percentage of the entries in the cache which can be purged automagically and by default is set to 10%. Definition at line 27 of file Caching_Strategies_T.cpp.
00028 : timer_ (0), 00029 purge_percent_ (10) 00030 { 00031 } |
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Accessor method for the timer attributes.
Definition at line 120 of file Caching_Strategies_T.inl. References ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::timer_.
00121 {
00122 return this->timer_;
00123 }
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Purge the cache.
Definition at line 192 of file Caching_Strategies_T.inl. References ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::caching_utility_.
00193 {
00194 return this->caching_utility_;
00195 }
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Dumps the state of the object.
Definition at line 198 of file Caching_Strategies_T.inl. References ACE_BEGIN_DUMP, ACE_DEBUG, ACE_END_DUMP, ACE_LIB_TEXT, ACE_TRACE, and LM_DEBUG.
00199 {
00200 #if defined (ACE_HAS_DUMP)
00201 ACE_TRACE ("ACE_LRU_Caching_Strategy::dump");
00202
00203 ACE_DEBUG ((LM_DEBUG, ACE_BEGIN_DUMP, this));
00204 ACE_DEBUG ((LM_DEBUG, ACE_LIB_TEXT ("timer_ = %d "), this->timer_));
00205 ACE_DEBUG ((LM_DEBUG, ACE_END_DUMP));
00206 #endif /* ACE_HAS_DUMP */
00207 }
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This method acts as a notification about the CONTAINERs bind method call. Definition at line 138 of file Caching_Strategies_T.inl. References ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::timer_.
00140 {
00141 ACE_UNUSED_ARG (attr);
00142
00143 if (result == 0)
00144 ++this->timer_;
00145
00146 return result;
00147 }
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This method acts as a notification about the CONTAINERs find method call Definition at line 150 of file Caching_Strategies_T.inl. References ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::timer_.
00152 {
00153 if (result == 0)
00154 {
00155 attr = this->timer_;
00156 ++this->timer_;
00157 }
00158
00159 return result;
00160 }
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This method acts as a notification about the CONTAINERs rebind method call Definition at line 180 of file Caching_Strategies_T.inl. References ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::timer_.
00182 {
00183 ACE_UNUSED_ARG (attr);
00184
00185 if (result == 0)
00186 ++this->timer_;
00187
00188 return result;
00189 }
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This method acts as a notification about the CONTAINERs trybind method call Definition at line 171 of file Caching_Strategies_T.inl.
00173 {
00174 ACE_UNUSED_ARG (attr);
00175
00176 return result;
00177 }
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This method acts as a notification about the CONTAINERs unbind method call Definition at line 163 of file Caching_Strategies_T.inl.
00165 {
00166 ACE_UNUSED_ARG (attr);
00167 return result;
00168 }
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Set the percentage of entries to purge.
Definition at line 132 of file Caching_Strategies_T.inl. References ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::purge_percent_.
00133 {
00134 this->purge_percent_ = percentage;
00135 }
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Get the percentage of entries to purge.
Definition at line 126 of file Caching_Strategies_T.inl. References ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::purge_percent_.
00127 {
00128 return this->purge_percent_;
00129 }
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This is the helper class which will decide and expunge entries from the cache. Definition at line 273 of file Caching_Strategies_T.h. Referenced by ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::caching_utility(). |
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The level about which the purging will happen automagically.
Definition at line 269 of file Caching_Strategies_T.h. Referenced by ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::purge_percent(). |
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This element is the one which is the deciding factor for purging of an ITEM. Definition at line 266 of file Caching_Strategies_T.h. Referenced by ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::attributes(), ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::notify_bind(), ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::notify_find(), and ACE_LRU_Caching_Strategy< ATTRIBUTES, CACHING_UTILITY >::notify_rebind(). |
1.3.6