dk.brics.jwig.server.cache

Class DependencyMap

java.lang.Object

dk.brics.jwig.server.cache.DependencyMap

public class DependencyMap
extends Object

The dependency map contains a map from objects to cached responses and XMLProducers that depend on them.

Constructor Summary

Constructors

Constructor and Description
DependencyMap()

Method Summary

Methods

Modifier and Type	Method and Description
void	addDependency(XMLProducer x, Object p) Registers the given XMLProducer as dependent on the given object.
void	addResponseDependency(Object p) Registers the current response object as dependent on the given object.
void	beginTransaction(boolean getMode)
CacheTransaction	getCurrentCacheTransaction()
boolean	hasTransaction()
boolean	mergeTransaction() Merges the current cache transaction with the dependency map.
void	objectUpdated(Object p) All entries that depend on the given object are invalidated in the cache and XMLProducers are recomputed.
void	pageRemovedFromCache(String url)
void	removeTransaction()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DependencyMap

public DependencyMap()

Method Detail

addDependency

public void addDependency(XMLProducer x,
                 Object p)

Registers the given XMLProducer as dependent on the given object.

addResponseDependency

public void addResponseDependency(Object p)

Registers the current response object as dependent on the given object.

beginTransaction

public void beginTransaction(boolean getMode)

getCurrentCacheTransaction

public CacheTransaction getCurrentCacheTransaction()

hasTransaction

public boolean hasTransaction()

mergeTransaction

public boolean mergeTransaction()

Merges the current cache transaction with the dependency map. Also checks of objects that this page depends on have changed.

Returns:

true if it is safe to cache the page

objectUpdated

public void objectUpdated(Object p)

All entries that depend on the given object are invalidated in the cache and XMLProducers are recomputed.

Parameters:

p - the object that has been updated

pageRemovedFromCache

public void pageRemovedFromCache(String url)

removeTransaction

public void removeTransaction()