JBoss API: Class LRUCachePolicy.LRUList

org.jboss.util
Class LRUCachePolicy.LRUList

java.lang.Object
  |
  +--org.jboss.util.LRUCachePolicy.LRUList
Direct Known Subclasses:
LRUEnterpriseContextCachePolicy.ContextLRUList
Enclosing class:
LRUCachePolicy

public class LRUCachePolicy.LRUList
extends java.lang.Object

Double queued list used to store cache entries.


Field Summary
 int m_cacheMiss
          The cache misses happened
 int m_capacity
          The current capacity of the cache list
 int m_count
          The number of cached objects
 LRUCachePolicy.LRUCacheEntry m_head
          The head of the double linked list
 int m_maxCapacity
          The maximum capacity of the cache list
 int m_minCapacity
          The minimum capacity of the cache list
 LRUCachePolicy.LRUCacheEntry m_tail
          The tail of the double linked list
 
Constructor Summary
protected LRUCachePolicy.LRUList()
          Creates a new double queued list.
 
Method Summary
protected  void capacityChanged(int oldCapacity)
          Callback that signals that the capacity of the cache is changed.
protected  void clear()
           
protected  void demote()
          Demotes from the cache the least used entry.
protected  void entryAdded(LRUCachePolicy.LRUCacheEntry entry)
          Callback that signals that the given entry has been added to the cache.
protected  void entryRemoved(LRUCachePolicy.LRUCacheEntry entry)
          Callback that signals that the given entry has been removed from the cache.
protected  void promote(LRUCachePolicy.LRUCacheEntry entry)
          Promotes the cache entry entry to the last used position of the list.
protected  void remove(LRUCachePolicy.LRUCacheEntry entry)
          Removes from the cache list the specified entry.
 java.lang.String toString()
           
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

m_maxCapacity

public int m_maxCapacity
The maximum capacity of the cache list

m_minCapacity

public int m_minCapacity
The minimum capacity of the cache list

m_capacity

public int m_capacity
The current capacity of the cache list

m_count

public int m_count
The number of cached objects

m_head

public LRUCachePolicy.LRUCacheEntry m_head
The head of the double linked list

m_tail

public LRUCachePolicy.LRUCacheEntry m_tail
The tail of the double linked list

m_cacheMiss

public int m_cacheMiss
The cache misses happened
Constructor Detail

LRUCachePolicy.LRUList

protected LRUCachePolicy.LRUList()
Creates a new double queued list.
Method Detail

clear

protected void clear()

promote

protected void promote(LRUCachePolicy.LRUCacheEntry entry)
Promotes the cache entry entry to the last used position of the list.
If the object is already there, does nothing.
Parameters:
entry - the object to be promoted, cannot be null
Throws:
java.lang.IllegalStateException - if this method is called with a full cache
See Also:
demote()

demote

protected void demote()
Demotes from the cache the least used entry.
If the cache is not full, does nothing.
See Also:
promote(org.jboss.util.LRUCachePolicy.LRUCacheEntry)

remove

protected void remove(LRUCachePolicy.LRUCacheEntry entry)
Removes from the cache list the specified entry.

entryAdded

protected void entryAdded(LRUCachePolicy.LRUCacheEntry entry)
Callback that signals that the given entry has been added to the cache.

entryRemoved

protected void entryRemoved(LRUCachePolicy.LRUCacheEntry entry)
Callback that signals that the given entry has been removed from the cache.

capacityChanged

protected void capacityChanged(int oldCapacity)
Callback that signals that the capacity of the cache is changed.
Parameters:
oldCapacity - the capacity before the change happened

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object


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