org.mmbase.applications.media.cache
Class URLCache

java.lang.Object
  org.mmbase.cache.Cache<String,String>
      org.mmbase.applications.media.cache.URLCache

All Implemented Interfaces:

Map<String,String>, CacheMBean, SizeMeasurable

public class URLCache
extends Cache<String,String>

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

Nested Class Summary

(package private) class

URLCache.CacheExpire Contains information about which objects are used to create a certain cache entry.

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

Map.Entry<K,V>

Field Summary

Fields inherited from class org.mmbase.cache.Cache

lock, maxEntrySize

Method Summary

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

Methods inherited from class org.mmbase.cache.Cache

checkCachePolicy, contains, containsKey, containsValue, entrySet, equals, get, getAvarageValueLength, getByteSize, getByteSize, getCheapByteSize, getCount, getDefaultMaxEntrySize, getHits, getImplementation, getLock, getMaxEntrySize, getMaxSize, getMisses, getPuts, getRatio, getSize, getStats, hashCode, isActive, isEmpty, keySet, maxSize, put, putAll, putCache, remove, reset, setActive, setMaxEntrySize, setMaxSize, size, toString, values

Methods inherited from class java.lang.Object

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

Method Detail

getCache

public static URLCache getCache()

toKey

public static String toKey(MMObjectNode mediaFragment,
                           Map<String,Object> 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(String key,
                String result,
                Set<MMObjectNode> objects)

put an entry in the cache

Parameters:

key - cache key

result - cache result

objects - the objects that can invalidate the cache

clear

public void clear()

Specified by:

clear in interface Map<String,String>

Specified by:

clear in interface CacheMBean

Overrides:

clear in class Cache<String,String>

See Also:

Map.clear()

nodeChange

public void nodeChange(String nodeNumber)

Invalidates cache entries based on the node that changes

Parameters:

nodeNumber - number of node that changes

getName

public 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.

Specified by:

getName in interface CacheMBean

Overrides:

getName in class Cache<String,String>

getDescription

public String getDescription()

Description copied from class: Cache

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

Specified by:

getDescription in interface CacheMBean

Overrides:

getDescription in class Cache<String,String>