org.mmbase.cache
Class ChainedReleaseStrategy

java.lang.Object
  org.mmbase.cache.ReleaseStrategy
      org.mmbase.cache.ChainedReleaseStrategy

public class ChainedReleaseStrategy

extends ReleaseStrategy

This class will manage a collection of ReleaseStrategy instances, and call them hierarchically.

Since:

MMBase-1.8

Version:

$Id: ChainedReleaseStrategy.java,v 1.18 2006/06/27 07:31:46 michiel Exp $

Author:

Ernst Bunders

Nested Class Summary

Nested classes inherited from class org.mmbase.cache.ReleaseStrategy

ReleaseStrategy.StrategyResult, ReleaseStrategy.Timer

Constructor Summary

ChainedReleaseStrategy()

Method Summary

void	addReleaseStrategy(ReleaseStrategy strategy) Adds the strategy if it is not already there.
void	clear()
protected boolean	doEvaluate(NodeEvent event, SearchQuery query, List cachedResult) implement this method to create your own strategy.
protected boolean	doEvaluate(RelationEvent event, SearchQuery query, List cachedResult) implement this method to create your own strategy.
String	getDescription()
String	getName()
Iterator	iterator()
void	removeAllStrategies() removes all strategies
void	removeStrategy(ReleaseStrategy strategy)
void	setEnabled(boolean newStatus) This method provides a way of globally switching off all strategies this one wraps.
int	size()
String	toString()

Methods inherited from class org.mmbase.cache.ReleaseStrategy

equals, evaluate, evaluate, getAvgEvaluationTimeInMilis, getConstraintsForField, getFieldSteps, getSortordersForField, getTotalEvaluated, getTotalEvaluationTimeMillis, getTotalPreserved, hashCode, isEnabled

Methods inherited from class java.lang.Object

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

Constructor Detail

ChainedReleaseStrategy

public ChainedReleaseStrategy()

Method Detail

setEnabled

public void setEnabled(boolean newStatus)

This method provides a way of globally switching off all strategies this one wraps. When this strategy is set to 'disabled', the state of all wrapped strategies is being preserved, so when it is being 'enabled' again, these settings are restored, in stead of just setting all wrapped strategies to 'enabled'.

Overrides:

setEnabled in class ReleaseStrategy

addReleaseStrategy

public void addReleaseStrategy(ReleaseStrategy strategy)

Adds the strategy if it is not already there. Strategies should only occur once.

Parameters:

strategy -

removeStrategy

public void removeStrategy(ReleaseStrategy strategy)

removeAllStrategies

public void removeAllStrategies()

removes all strategies

getName

public String getName()

Specified by:

getName in class ReleaseStrategy

getDescription

public String getDescription()

Specified by:

getDescription in class ReleaseStrategy

iterator

public Iterator iterator()

doEvaluate

protected final boolean doEvaluate(NodeEvent event,
                                   SearchQuery query,
                                   List cachedResult)

Description copied from class: ReleaseStrategy

implement this method to create your own strategy.

Specified by:

doEvaluate in class ReleaseStrategy

Parameters:

event - a node event

query -

cachedResult -

Returns:

true if the cache entry should be released

doEvaluate

protected final boolean doEvaluate(RelationEvent event,
                                   SearchQuery query,
                                   List cachedResult)

Description copied from class: ReleaseStrategy

implement this method to create your own strategy.

Specified by:

doEvaluate in class ReleaseStrategy

Parameters:

event - a relation event

query -

cachedResult -

Returns:

true if the cache entry should be released

clear

public void clear()

Overrides:

clear in class ReleaseStrategy

size

public int size()

Since:

MMBase-1.8.1

toString

public String toString()

Overrides:

toString in class ReleaseStrategy