Class URLCache

  extended byjava.util.Dictionary
      extended byjava.util.Hashtable
          extended byorg.mmbase.util.LRUHashtable
              extended byorg.mmbase.cache.Cache
All Implemented Interfaces:
java.lang.Cloneable, java.util.Map,, 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.

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
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


public static URLCache getCache()


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

mediaFragment - fragment to be cached
info - user information to be cached
key to be cached


public void put(java.lang.String key,
                java.lang.String result,
                java.util.Set objects)
put an entry in the cache

key - cache key
result - cache result
objects - the objects that can invalidate the cache


public void nodeChange(java.lang.String nodeNumber)
Invalidates cache entries based on the node that changes

nodeNumber - number of node that changes


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.

getName in class Cache


public java.lang.String getDescription()
Description copied from class: Cache
Gives a description for this cache type. This can be used in cache overviews.

getDescription in class Cache

MMBase build