org.mmbase.cache
Class MultilevelCacheHandler

java.lang.Object
  |
  +--java.util.Dictionary
        |
        +--java.util.Hashtable
              |
              +--org.mmbase.util.LRUHashtable
                    |
                    +--org.mmbase.cache.Cache
                          |
                          +--org.mmbase.cache.MultilevelCacheHandler

All Implemented Interfaces:

java.lang.Cloneable, java.util.Map, java.io.Serializable, SizeMeasurable

public class MultilevelCacheHandler

extends Cache

This object handles cache multilevel tag cache requests. it removed invalid lines adding listeners to builders used in the multilevel query's

Version:

$Id: MultilevelCacheHandler.java,v 1.9.2.1 2002/11/26 22:39:39 kees Exp $

Author:

Daniel Ockeloen, Michiel Meeuwissen

See Also:

Serialized Form

Inner classes inherited from class org.mmbase.util.LRUHashtable

LRUHashtable.LRUEntry

Inner classes inherited from class java.util.Map

java.util.Map.Entry

Fields inherited from class org.mmbase.cache.Cache

maxEntrySize

Method Summary

java.lang.Integer	calcHashMultiLevel(StringTagger tagger) Create a hashcode for all the parameters in a multilevel request coming from the MMCI.
void	callbackRemove(java.lang.Object key) call the real remove in the LRU
java.lang.Object	get(java.lang.Object key) Like 'get' of LRUHashtable but considers if the cache is active or not.
static MultilevelCacheHandler	getCache()
static Cache	getCache(java.lang.String name) Returns the Cache with a certain name.
java.lang.String	getDescription() Gives a description for this cache type.
java.lang.String	getName() Returns a name for this cache type.
java.lang.Object	put(java.lang.Object hash, java.lang.Object o, java.util.Vector types, StringTagger tagger)
java.lang.Object	remove(java.lang.Object key) intercept remove of LRU to make sure we remove from all Observers first the clear will call the real remove
static void	setMMBase(MMBase m)

Methods inherited from class org.mmbase.cache.Cache

getByteSize, getByteSize, getCaches, getDefaultMaxEntrySize, getMaxEntrySize, getTotalByteSize, isActive, main, put, putCache, putCache, setActive

Methods inherited from class org.mmbase.util.LRUHashtable

clear, clone, elements, entrySet, getCount, getHits, getMisses, getOrderedElements, getOrderedElements, getOrderedEntries, getOrderedEntries, getPuts, getRatio, getSize, getStats, keySet, setSize, size, toString, toString, values

Methods inherited from class java.util.Hashtable

contains, containsKey, containsValue, equals, hashCode, isEmpty, keys, putAll, rehash

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

getCache

public static MultilevelCacheHandler getCache()

getName

public java.lang.String getName()

Description copied from class: Cache

Returns a name for this cache type. Default it is the class name, but this normally will be overriden.

Overrides:

getName in class Cache

getDescription

public java.lang.String getDescription()

Description copied from class: Cache

Gives a description for this cache type. This can be used in cache overviews.

Overrides:

getDescription in class Cache

put

public java.lang.Object put(java.lang.Object hash,
                            java.lang.Object o,
                            java.util.Vector types,
                            StringTagger tagger)

setMMBase

public static void setMMBase(MMBase m)

getCache

public static Cache getCache(java.lang.String name)

Deprecated. use getCache

Description copied from class: Cache

Returns the Cache with a certain name. To be used in combination with getCaches().

Following copied from class: org.mmbase.cache.Cache

See Also:

Cache.getCaches()

get

public java.lang.Object get(java.lang.Object key)

Description copied from class: Cache

Like 'get' of LRUHashtable but considers if the cache is active or not.

Overrides:

get in class Cache

Following copied from class: org.mmbase.util.LRUHashtable

Parameters:

key - the key of the element

Returns:

the value of the element, or null if it could not be found

remove

public java.lang.Object remove(java.lang.Object key)

intercept remove of LRU to make sure we remove from all Observers first the clear will call the real remove

Overrides:

remove in class LRUHashtable

Following copied from class: org.mmbase.util.LRUHashtable

Parameters:

key - the key of the element

Returns:

the original value of the element if it existed, null if it could not be found

callbackRemove

public void callbackRemove(java.lang.Object key)

call the real remove in the LRU

calcHashMultiLevel

public java.lang.Integer calcHashMultiLevel(StringTagger tagger)

Create a hashcode for all the parameters in a multilevel request coming from the MMCI.