ch.elexis.data.cache
Class SoftCache<K>

java.lang.Object
  ch.elexis.data.cache.SoftCache<K>

All Implemented Interfaces:

IPersistentObjectCache<K>

public class SoftCache<K>
extends java.lang.Object
implements IPersistentObjectCache<K>

A Cache with soft references and optional expiring items The cache keeps count on numbes of items that are added, removed or expired and can display its statistic

Nested Class Summary

class

SoftCache.CacheEntry

Field Summary

protected java.util.Map<K,SoftCache.CacheEntry>	cache
protected long	expired
protected long	hits
protected long	inserts
protected Log	log
protected long	misses
protected long	removed

Constructor Summary

SoftCache()

SoftCache(int num)

SoftCache(int num, float load)

Method Summary

void	clear()
java.lang.Object	get(K key) retrieve a previously inserted object
void	purge() Expire and remove all Objects (without removing the SoftReferences, to avoid ConcurrentModificationExceptions)
void	put(K key, java.lang.Object object, int timeToCacheInSeconds) Insert an Object that will stay until it is manually removed, or memory gets low, or at most for ICacheable#getCacheTime seconds
void	remove(K key)
void	reset() completely delete cache
void	stat() write statistics to log

Methods inherited from class java.lang.Object

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

Field Detail

cache

protected java.util.Map<K,SoftCache.CacheEntry> cache

hits

protected long hits

misses

protected long misses

removed

protected long removed

inserts

protected long inserts

expired

protected long expired

log

protected Log log

Constructor Detail

SoftCache

public SoftCache()

SoftCache

public SoftCache(int num,
                 float load)

SoftCache

public SoftCache(int num)

Method Detail

put

public void put(K key,
                java.lang.Object object,
                int timeToCacheInSeconds)

Description copied from interface: IPersistentObjectCache

Insert an Object that will stay until it is manually removed, or memory gets low, or at most for ICacheable#getCacheTime seconds

Specified by:

put in interface IPersistentObjectCache<K>

get

public java.lang.Object get(K key)

Description copied from interface: IPersistentObjectCache

retrieve a previously inserted object

Specified by:

get in interface IPersistentObjectCache<K>

Returns:

the object or null, if the object was expired or removed bei the garbage collector.

remove

public void remove(K key)

Specified by:

remove in interface IPersistentObjectCache<K>

clear

public void clear()

Specified by:

clear in interface IPersistentObjectCache<K>

stat

public void stat()

Description copied from interface: IPersistentObjectCache

write statistics to log

Specified by:

stat in interface IPersistentObjectCache<K>

purge

public void purge()

Description copied from interface: IPersistentObjectCache

Expire and remove all Objects (without removing the SoftReferences, to avoid ConcurrentModificationExceptions)

Specified by:

purge in interface IPersistentObjectCache<K>

reset

public void reset()

Description copied from interface: IPersistentObjectCache

completely delete cache

Specified by:

reset in interface IPersistentObjectCache<K>