Package org.apache.oro.util

Class CacheFIFO2

java.lang.Object
org.apache.oro.util.GenericCache
org.apache.oro.util.CacheFIFO2
All Implemented Interfaces:
Serializable, Cache
public final class CacheFIFO2 extends GenericCache
This class is a GenericCache subclass implementing a second chance FIFO (First In First Out) cache replacement policy. In other words, values are added to the cache until the cache becomes full. Once the cache is full, when a new value is added to the cache, it replaces the first of the current values in the cache to have been added, unless that value has been used recently (generally between the last cache replacement and now). If the value to be replaced has been used, it is given a second chance, and the next value in the cache is tested for replacement in the same manner. If all the values are given a second chance, then the original pattern selected for replacement is replaced.
Since:
1.0
Version:
2.0.8
See Also:

  • Constructor Details

    • CacheFIFO2

      public CacheFIFO2(int capacity)
      Creates a CacheFIFO2 instance with a given cache capacity.

      Parameters:
      capacity - The capacity of the cache.

    • CacheFIFO2

      public CacheFIFO2()
      Same as: 
       CacheFIFO2(GenericCache.DEFAULT_CAPACITY);

  • Method Details

    • getElement

      public Object getElement(Object key)
      Specified by:
      getElement in interface Cache
      Overrides:
      getElement in class GenericCache

    • addElement

      public final void addElement(Object key, Object value)
      Adds a value to the cache. If the cache is full, when a new value is added to the cache, it replaces the first of the current values in the cache to have been added (i.e., FIFO2).

      Specified by:
      addElement in interface Cache
      Specified by:
      addElement in class GenericCache
      Parameters:
      key - The key referencing the value added to the cache.
      value - The value to add to the cache.