de.ipcon.db.core

Class CachingBOLoaderLRUStrategy

java.lang.Object

de.ipcon.db.core.CachingBOLoaderLRUStrategy

All Implemented Interfaces:

CachingBOLoaderUpdateStrategyI

public class CachingBOLoaderLRUStrategy
extends java.lang.Object
implements CachingBOLoaderUpdateStrategyI

This class implements a class limited LRU update strategy with matching gcStrategy. It allows to register a set of classes including class specific limits to keep inside of the cache. Those limits are honored using a relatively simple LRU strategy.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CachingBOLoaderLRUStrategy.ClassLimitedLRUContainer

Constructor Summary

Constructors

Constructor and Description
CachingBOLoaderLRUStrategy(CachingBOLoader _boLoader, java.lang.Class[] _keepClasses, int[] _maxKeeps, int _interval)

Method Summary

Modifier and Type	Method and Description
java.util.Set<EntityI>	getUpdateableEntities() A Set of EntityI Instances that will be registered in the DBMan listener and whose procs will be queried on changes.
boolean	isLoadAnyChangesIntoCache()
boolean	isRelevantRegardingKeepClasses(java.lang.Class<? extends BOI> clazz)
CachingBOLoaderRegistration	registerKeepClass(java.lang.Class c, int maxKeep)
CachingBOLoaderRegistration	registerKeepClasses(java.lang.Class[] cs, int maxKeep)
void	unregisterKeepClass(CachingBOLoaderRegistration r)
void	unregisterKeepClasses(CachingBOLoaderRegistration[] rr)
void	unregisterKeepClassesProtected(CachingBOLoaderRegistration[] rr)

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingBOLoaderLRUStrategy

public CachingBOLoaderLRUStrategy(CachingBOLoader _boLoader,
                                  java.lang.Class[] _keepClasses,
                                  int[] _maxKeeps,
                                  int _interval)

Method Detail

getUpdateableEntities

public java.util.Set<EntityI> getUpdateableEntities()

Description copied from interface: CachingBOLoaderUpdateStrategyI

A Set of EntityI Instances that will be registered in the DBMan listener and whose procs will be queried on changes.

Specified by:

getUpdateableEntities in interface CachingBOLoaderUpdateStrategyI

Returns:

a set of Entities to keep updated.

isRelevantRegardingKeepClasses

public boolean isRelevantRegardingKeepClasses(java.lang.Class<? extends BOI> clazz)

Specified by:

isRelevantRegardingKeepClasses in interface CachingBOLoaderUpdateStrategyI

Returns:

true, if the passed Class is one of classes (or a subclass of one) that will be kept updated. Will only be called on classes defined by getUpdateableEntities

isLoadAnyChangesIntoCache

public boolean isLoadAnyChangesIntoCache()

Specified by:

isLoadAnyChangesIntoCache in interface CachingBOLoaderUpdateStrategyI

Returns:

false because adding changed BOs will mess with our LRU strategy the moment they're frapped

registerKeepClass

public CachingBOLoaderRegistration registerKeepClass(java.lang.Class c,
                                                     int maxKeep)

registerKeepClasses

public CachingBOLoaderRegistration registerKeepClasses(java.lang.Class[] cs,
                                                       int maxKeep)

unregisterKeepClass

public void unregisterKeepClass(CachingBOLoaderRegistration r)

unregisterKeepClasses

public void unregisterKeepClasses(CachingBOLoaderRegistration[] rr)

unregisterKeepClassesProtected

public void unregisterKeepClassesProtected(CachingBOLoaderRegistration[] rr)