Package org.apache.commons.jcs3.auxiliary.disk.indexed

Class IndexedDiskCache.LRUMapSizeLimited

java.lang.Object

org.apache.commons.jcs3.utils.struct.AbstractLRUMap<K,IndexedDiskElementDescriptor>

org.apache.commons.jcs3.auxiliary.disk.indexed.IndexedDiskCache.LRUMapSizeLimited

All Implemented Interfaces:

Map<K,IndexedDiskElementDescriptor>

Enclosing class:

IndexedDiskCache<K,V>

public class IndexedDiskCache.LRUMapSizeLimited
extends AbstractLRUMap<K,IndexedDiskElementDescriptor>

Class for recycling and lru. This implements the LRU overflow callback, so we can add items to the recycle bin. This class counts the size element to decide, when to throw away an element

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Field Summary

Fields

Modifier and Type	Field	Description
static final String	TAG	tag tells us which map we are working on.

Constructor Summary

Constructors

Constructor	Description
LRUMapSizeLimited()	Default
LRUMapSizeLimited(int maxKeySize)

Method Summary

Modifier and Type	Method	Description
protected void	processRemovedLRU(K key, IndexedDiskElementDescriptor value)	This is called when the may key size is reached.
IndexedDiskElementDescriptor	put(K key, IndexedDiskElementDescriptor value)
IndexedDiskElementDescriptor	remove(Object key)
protected boolean	shouldRemove()

Methods inherited from class org.apache.commons.jcs3.utils.struct.AbstractLRUMap

clear, containsKey, containsValue, dumpCacheEntries, dumpMap, entrySet, get, getQuiet, getStatistics, isEmpty, keySet, putAll, size, values, verifyCache

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

Field Details

TAG

public static final String TAG

tag tells us which map we are working on.

See Also:

• Constant Field Values

Constructor Details

LRUMapSizeLimited

public LRUMapSizeLimited()

Default

LRUMapSizeLimited

public LRUMapSizeLimited(int maxKeySize)

Parameters:

maxKeySize -

Method Details

put

public IndexedDiskElementDescriptor put(K key,
 IndexedDiskElementDescriptor value)

Specified by:

put in interface Map<K,IndexedDiskElementDescriptor>

Overrides:

put in class AbstractLRUMap<K,IndexedDiskElementDescriptor>

Returns:

Object

remove

public IndexedDiskElementDescriptor remove(Object key)

Specified by:

remove in interface Map<K,IndexedDiskElementDescriptor>

Overrides:

remove in class AbstractLRUMap<K,IndexedDiskElementDescriptor>

Returns:

Object removed

processRemovedLRU

protected void processRemovedLRU(K key,
 IndexedDiskElementDescriptor value)

This is called when the may key size is reached. The least recently used item will be passed here. We will store the position and size of the spot on disk in the recycle bin.

Overrides:

processRemovedLRU in class AbstractLRUMap<K,IndexedDiskElementDescriptor>

Parameters:

key -

value -

shouldRemove

protected boolean shouldRemove()

Specified by:

shouldRemove in class AbstractLRUMap<K,IndexedDiskElementDescriptor>