org.mmbase.applications.media.cache
Class URLCache

java.lang.Object
  java.util.Dictionary
      java.util.Hashtable
          org.mmbase.util.LRUHashtable
              org.mmbase.cache.Cache
                  org.mmbase.applications.media.cache.URLCache

All Implemented Interfaces:

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

public class URLCache

extends Cache

A cache for URLS requested in the MediaFragment builder. This cache can easily be extended in such a way it can cache more requests.

Author:

Rob Vermeulen (VPRO), Michiel Meeuwissen (NOS)

See Also:

Serialized Form

Nested Class Summary

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

LRUHashtable.LRUEntry, LRUHashtable.LRUEntrySet, LRUHashtable.LRUEntrySetIterator

Field Summary

Fields inherited from class org.mmbase.cache.Cache

maxEntrySize

Method Summary

static URLCache	getCache()
java.lang.String	getDescription() Gives a description for this cache type.
java.lang.String	getName() Returns a name for this cache type.
void	nodeChange(java.lang.String nodeNumber) Invalidates cache entries based on the node that changes
void	put(java.lang.String key, java.lang.String result, java.util.Set objects) put an entry in the cache
static java.lang.String	toKey(MMObjectNode mediaFragment, java.util.Map info) creates a key based of the media fragment number and the user information

Methods inherited from class org.mmbase.cache.Cache

get, getByteSize, getByteSize, getCache, 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, remove, 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 URLCache getCache()

toKey

public static java.lang.String toKey(MMObjectNode mediaFragment,
                                     java.util.Map info)

creates a key based of the media fragment number and the user information

Parameters:

mediaFragment - fragment to be cached

info - user information to be cached

Returns:

key to be cached

put

public void put(java.lang.String key,
                java.lang.String result,
                java.util.Set objects)

put an entry in the cache

Parameters:

key - cache key

result - cache result

objects - the objects that can invalidate the cache

nodeChange

public void nodeChange(java.lang.String nodeNumber)

Invalidates cache entries based on the node that changes

Parameters:

nodeNumber - number of node that changes

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