Package org.apache.struts2.ognl

Class OgnlLRUCache<K,V>

java.lang.Object

org.apache.struts2.ognl.OgnlLRUCache<K,V>

Type Parameters:

K - The type for the cache key entries

V - The type for the cache value entries

All Implemented Interfaces:

OgnlCache<K,V>

public class OgnlLRUCache<K,V>
extends Object
implements OgnlCache<K,V>

A basic OGNL LRU cache implementation.

The implementation utilizes a Collections.synchronizedMap(java.util.Map) backed by a LinkedHashMap. May be replaced by a more efficient implementation in the future.

Setting too low an eviction limit will produce more overhead than value.

Setting too high an eviction limit may also produce more overhead than value.

An appropriate eviction limit will need to be determined on an individual application basis.

Constructor Summary

Constructors

Constructor	Description
OgnlLRUCache(int evictionLimit, int initialCapacity, float loadFactor)

Method Summary

Modifier and Type	Method	Description
void	clear()
V	get(K key)
int	getEvictionLimit()
void	put(K key, V value)
void	putIfAbsent(K key, V value)
void	setEvictionLimit(int cacheEvictionLimit)
int	size()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

OgnlLRUCache

public OgnlLRUCache(int evictionLimit,
 int initialCapacity,
 float loadFactor)

Method Details

get

public V get(K key)

Specified by:

get in interface OgnlCache<K,V>

put

public void put(K key,
 V value)

Specified by:

put in interface OgnlCache<K,V>

putIfAbsent

public void putIfAbsent(K key,
 V value)

Specified by:

putIfAbsent in interface OgnlCache<K,V>

size

public int size()

Specified by:

size in interface OgnlCache<K,V>

clear

public void clear()

Specified by:

clear in interface OgnlCache<K,V>

getEvictionLimit

public int getEvictionLimit()

Specified by:

getEvictionLimit in interface OgnlCache<K,V>

setEvictionLimit

public void setEvictionLimit(int cacheEvictionLimit)

Specified by:

setEvictionLimit in interface OgnlCache<K,V>