mondrian.rolap.cache

Class SoftSmartCache<K,V>

java.lang.Object

mondrian.rolap.cache.SoftSmartCache<K,V>

All Implemented Interfaces:

Iterable<Map.Entry<K,V>>, SmartCache<K,V>

public class SoftSmartCache<K,V>
extends Object
implements SmartCache<K,V>

A map with soft references that is cleaned up in regular intervals.

There is no contains(key) method because it makes no sense - after contains() returns true, the garbage collector may remove the value that was contained. Instead the code should call get() and keep a reference to the value to prevent garbage collection.

Since:

Nov 3, 2005

Author:

av

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) class	SoftSmartCache.CacheReference an entry in the cache that contains the key for the cache map to remove the entry when its value has been garbage collected

Constructor Summary

Constructors

Constructor and Description
SoftSmartCache()

Method Summary

Methods

Modifier and Type	Method and Description
void	clear()
V	get(K key)
Iterator<Map.Entry<K,V>>	iterator()
V	put(K key, V value) Places a key/value pair into the queue.
V	remove(K key) Removes a key from the cache.
int	size()

Methods inherited from class java.lang.Object

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

Constructor Detail

SoftSmartCache

public SoftSmartCache()

Method Detail

put

public V put(K key,
    V value)

Description copied from interface: SmartCache

Places a key/value pair into the queue.

Specified by:

put in interface SmartCache<K,V>

Parameters:

key - Key

value - Value

Returns:

the previous value of key or null

get

public V get(K key)

Specified by:

get in interface SmartCache<K,V>

remove

public V remove(K key)

Description copied from interface: SmartCache

Removes a key from the cache.

Specified by:

remove in interface SmartCache<K,V>

Parameters:

key - Key

Returns:

Previous value associated with the key

clear

public void clear()

Specified by:

clear in interface SmartCache<K,V>

size

public int size()

Specified by:

size in interface SmartCache<K,V>

iterator

public Iterator<Map.Entry<K,V>> iterator()

Specified by:

iterator in interface Iterable<Map.Entry<K,V>>