Package com.sun.ejb.containers.util.cache

Class NRUSessionCache

java.lang.Object

com.sun.appserv.util.cache.BaseCache

com.sun.appserv.util.cache.LruCache

com.sun.ejb.containers.util.cache.LruEJBCache

com.sun.ejb.containers.util.cache.LruSessionCache

com.sun.ejb.containers.util.cache.NRUSessionCache

All Implemented Interfaces:

Cache, EjbCacheStatsProviderDelegate, StatsProvider

public class NRUSessionCache
extends LruSessionCache

Nested Class Summary

Nested classes/interfaces inherited from class com.sun.ejb.containers.util.cache.LruSessionCache

LruSessionCache.LruSessionCacheItem

Nested classes/interfaces inherited from class com.sun.appserv.util.cache.LruCache

LruCache.LruCacheItem

Nested classes/interfaces inherited from class com.sun.appserv.util.cache.BaseCache

BaseCache.CacheItem

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	doOrdering
protected int	orderingThreshold

Fields inherited from class com.sun.ejb.containers.util.cache.LruSessionCache

backingStore, cacheIdleTimeoutInSeconds, configData, confMaxCacheSize, container, loadCountLock, loadFromBackupCount, removalTimeoutInSeconds, removeIfIdle

Fields inherited from class com.sun.ejb.containers.util.cache.LruEJBCache

_logger, cacheName

Fields inherited from class com.sun.appserv.util.cache.LruCache

defaultMaxEntries, head, isUnbounded, listSize, NO_TIMEOUT, tail, timeout, trimCount

Fields inherited from class com.sun.appserv.util.cache.BaseCache

bucketLocks, buckets, entryCount, hitCount, listeners, maxBuckets, maxEntries, missCount, refreshFlags, removalCount, threshold

Constructor Summary

Constructors

Constructor	Description
NRUSessionCache(String cacheName, SFSBContainerCallback container, int cacheIdleTime, int removalTime)

Method Summary

Modifier and Type	Method	Description
void	init(int maxEntries, float loadFactor, Properties props)	initialize the cache
protected void	itemAccessed(BaseCache.CacheItem item)	this item is accessed
protected BaseCache.CacheItem	itemAdded(BaseCache.CacheItem item)	/** this item is just added to the cache
protected void	itemRefreshed(BaseCache.CacheItem item, int oldSize)	item value has been refreshed
protected void	itemRemoved(BaseCache.CacheItem item)	item value has been removed from the cache
void	trimTimedoutItems(int maxCount)	trim the timedOut entries from the cache.

Methods inherited from class com.sun.ejb.containers.util.cache.LruSessionCache

appendStats, createItem, destroy, eligibleForRemovalFromCache, getCacheHits, getCacheMisses, getLoadFromBackupCount, getMaxCacheSize, getNumBeansInCache, getNumExpiredSessionsRemoved, getNumPassivationErrors, getNumPassivations, getNumPassivationSuccess, getNumVictimsAccessed, incrementLoadFromBackupCount, lookupEJB, passivateEJB, remove, remove, setBackingStore, setConfigData, setMaxCacheSize, setShutdownState, setStatefulSessionStoreMonitor, setUndeployedState, shutdown, trimItem, trimUnSortedTimedoutItems, values

Methods inherited from class com.sun.ejb.containers.util.cache.LruEJBCache

setCacheName, trimLru

Methods inherited from class com.sun.appserv.util.cache.LruCache

getStatByName, getStats, init, setTimeout, trimExpiredEntries

Methods inherited from class com.sun.appserv.util.cache.BaseCache

_put, _remove, _removeItem, add, add, addCacheListener, clear, clearStats, contains, decrementEntryCount, elements, eq, get, get, getAll, getEntryCount, getIndex, getIndex, handleOverflow, hash, incrementAddCount, incrementEntryCount, incrementHitCount, incrementMissCount, incrementOverflowCount, incrementRefreshCount, incrementRemovalCount, init, isEmpty, isThresholdReached, keys, loadValue, notifyRefresh, put, put, remove, remove, removeAll, waitRefresh

Methods inherited from class java.lang.Object

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

Field Detail

doOrdering

protected boolean doOrdering

orderingThreshold

protected int orderingThreshold

Constructor Detail

NRUSessionCache

public NRUSessionCache(String cacheName,
                       SFSBContainerCallback container,
                       int cacheIdleTime,
                       int removalTime)

Method Detail

init

public void init(int maxEntries,
                 float loadFactor,
                 Properties props)

Description copied from class: BaseCache

initialize the cache

Specified by:

init in interface Cache

Overrides:

init in class BaseCache

Parameters:

maxEntries - maximum number of entries expected in the cache

loadFactor - the load factor

props - opaque list of properties for a given cache implementation

itemAdded

protected BaseCache.CacheItem itemAdded(BaseCache.CacheItem item)

Description copied from class: LruCache

/** this item is just added to the cache

Overrides:

itemAdded in class LruEJBCache

Parameters:

item - CacheItem that was created

Returns:

a overflow item; may be null this function checks if adding the new item results in a overflow; if so, it returns the item to be removed. Cache bucket is already synchronized by the caller

itemAccessed

protected void itemAccessed(BaseCache.CacheItem item)

Description copied from class: LruCache

this item is accessed

Overrides:

itemAccessed in class LruSessionCache

Parameters:

item - CacheItem accessed Cache bucket is already synchronized by the caller

itemRefreshed

protected void itemRefreshed(BaseCache.CacheItem item,
                             int oldSize)

Description copied from class: LruCache

item value has been refreshed

Overrides:

itemRefreshed in class LruCache

Parameters:

item - CacheItem that was refreshed

oldSize - size of the previous value that was refreshed Cache bucket is already synchronized by the caller

itemRemoved

protected void itemRemoved(BaseCache.CacheItem item)

Description copied from class: LruCache

item value has been removed from the cache

Overrides:

itemRemoved in class LruCache

Parameters:

item - CacheItem that was just removed Cache bucket is already synchronized by the caller

trimTimedoutItems

public void trimTimedoutItems(int maxCount)

Description copied from class: LruSessionCache

trim the timedOut entries from the cache. This call is to be scheduled by a thread managed by the container. In this case a sorted LRU list exists based on access time and this list is scanned

Overrides:

trimTimedoutItems in class LruSessionCache