Java Doc for QueryResultCache.java in  » Database-ORM » MMBase » org » mmbase » cache » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database ORM » MMBase » org.mmbase.cache 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.mmbase.cache.QueryResultCache

All known Subclasses:   org.mmbase.cache.MultilevelCache,  org.mmbase.cache.RelatedNodesCache,  org.mmbase.cache.NodeListCache,  org.mmbase.cache.AggregatedResultCache,
QueryResultCache
abstract public class QueryResultCache extends Cache> implements NodeEventListener,RelationEventListener(Code)
This cache provides a base implementation to cache the result of SearchQuery's. Such a cache links a SearchQuery object to a list of MMObjectNodes. A cache entry is automaticly invalidated if arbitrary node of one of the types present in the SearchQuery is changed (,created or deleted). This mechanism is not very subtle but it is garanteed to be correct. It means though that your cache can be considerably less effective for queries containing node types from which often node are edited.
author:
   Daniel Ockeloen
author:
   Michiel Meeuwissen
author:
   Bunst Eunders
version:
   $Id: QueryResultCache.java,v 1.45 2007/09/17 16:53:01 pierre Exp $
since:
   MMBase-1.7
See Also:   org.mmbase.storage.search.SearchQuery



Constructor Summary
 QueryResultCache(int size)
    

Method Summary
public  voidaddReleaseStrategies(List<ReleaseStrategy> strategies)
    
public  voidaddReleaseStrategy(ReleaseStrategy releaseStrategy)
     This method lets you add a release strategy to the cache.
public  voidclear()
    
public  ChainedReleaseStrategygetReleaseStrategy()
    
protected  intnodeChanged(Event event)
    
public  voidnotify(RelationEvent event)
    
public  voidnotify(NodeEvent event)
    
public synchronized  List<MMObjectNode>put(SearchQuery query, List<MMObjectNode> queryResult)
     Puts a search result in this cache.
public synchronized  List<MMObjectNode>remove(SearchQuery key)
     Removes an object from the cache.
public  StringtoString()
    


Constructor Detail
QueryResultCache
QueryResultCache(int size)(Code)




Method Detail
addReleaseStrategies
public void addReleaseStrategies(List<ReleaseStrategy> strategies)(Code)

Parameters:
  strategies -



addReleaseStrategy
public void addReleaseStrategy(ReleaseStrategy releaseStrategy)(Code)
This method lets you add a release strategy to the cache. It will in fact be added to ChainedReleaseStrategy, which is the default base release strategy.
Parameters:
  releaseStrategy - A releaseStrategy to add.



clear
public void clear()(Code)



getReleaseStrategy
public ChainedReleaseStrategy getReleaseStrategy()(Code)
Returns the releaseStrategy.



nodeChanged
protected int nodeChanged(Event event) throws IllegalArgumentException(Code)



notify
public void notify(RelationEvent event)(Code)

See Also:   org.mmbase.core.event.RelationEventListener.notify(org.mmbase.core.event.RelationEvent)



notify
public void notify(NodeEvent event)(Code)

See Also:   org.mmbase.core.event.NodeEventListener.notify(org.mmbase.core.event.NodeEvent)



put
public synchronized List<MMObjectNode> put(SearchQuery query, List<MMObjectNode> queryResult)(Code)
Puts a search result in this cache.



remove
public synchronized List<MMObjectNode> remove(SearchQuery key)(Code)
Removes an object from the cache. It alsos remove the watch from the observers which are watching this entry.
Parameters:
  key - A SearchQuery object.



toString
public String toString()(Code)



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