com.fr.cache

类 FRCache

java.lang.Object

com.fr.cache.FRCache

所有已实现的接口:

java.io.Serializable

public class FRCache
extends java.lang.Object
implements java.io.Serializable

另请参阅:

序列化表格

构造器概要

构造器

构造器和说明
FRCache(CacheConfiguration config)

方法概要

方法

限定符和类型	方法和说明
void	dispose()
Unity	get(java.lang.Object key) Gets an element from the cache.
RegisteredEventListeners	getCacheEventNotificationService() Use this to access the service in order to register and unregister listeners
int	getMaxElementsInMemory() Gets the maximum number of elements to hold in memory.
MemoryStoreEvictionPolicy	getMemoryStoreEvictionPolicy()
java.lang.Object	getObject(java.lang.Object key)
Status	getStatus()
MemoryStore	getStore()
boolean	isExpired(Unity unity)
void	put(java.lang.Object key, java.lang.Object value)
void	put(Unity unity)
boolean	remove(java.lang.Object key) Removes or expires an Unity from the Cache after an attempt to get it determined that it should be expired.

从类继承的方法 java.lang.Object

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

构造器详细资料

FRCache

public FRCache(CacheConfiguration config)

方法详细资料

put

public final void put(java.lang.Object key,
       java.lang.Object value)

put

public final void put(Unity unity)

getObject

public final java.lang.Object getObject(java.lang.Object key)

get

public final Unity get(java.lang.Object key)
                throws java.lang.IllegalStateException,
                       CacheException

Gets an element from the cache. Updates Element Statistics

Note that the Element's lastAccessTime is always the time of this get. Use #getQuiet(Object) to peak into the Element to see its last access time with get

Synchronization is handled within the method.

参数:

key - an Object value

返回:

the element, or null, if it does not exist.

抛出:

java.lang.IllegalStateException - if the cache is not Status#STATUS_ALIVE

CacheException

从以下版本开始:

1.2

另请参阅:

isExpired(com.fr.cache.Unity)

isExpired

public final boolean isExpired(Unity unity)
                        throws java.lang.IllegalStateException,
                               java.lang.NullPointerException

抛出:

java.lang.IllegalStateException

java.lang.NullPointerException

getStore

public MemoryStore getStore()

remove

public boolean remove(java.lang.Object key)
               throws java.lang.IllegalStateException

Removes or expires an Unity from the Cache after an attempt to get it determined that it should be expired. This also removes it from any stores it may be in.

Also notifies the CacheEventListener after the element has expired, but only if an Element with the key actually existed.

Synchronization is handled within the method.

If a remove was called, listeners are notified, regardless of whether the element existed or not. This allows distributed cache listeners to remove elements from a cluster regardless of whether they existed locally.

Caches which use synchronous replication can throw RemoteCacheException here if the replication to the cluster fails. This exception should be caught in those cirucmstances.

参数:

key - the element key to operate on

expiry - if the reason this method is being called is to expire the element

notifyListeners - whether to notify listeners

doNotNotifyCacheReplicators - whether not to notify cache replicators

返回:

true if the element was removed, false if it was not found in the cache

抛出:

java.lang.IllegalStateException - if the cache is not Status#STATUS_ALIVE

getCacheEventNotificationService

public final RegisteredEventListeners getCacheEventNotificationService()

Use this to access the service in order to register and unregister listeners

返回:

the RegisteredEventListeners instance for this cache.

getMaxElementsInMemory

public final int getMaxElementsInMemory()

Gets the maximum number of elements to hold in memory.

getMemoryStoreEvictionPolicy

public final MemoryStoreEvictionPolicy getMemoryStoreEvictionPolicy()

getStatus

public final Status getStatus()

dispose

public void dispose()
             throws java.lang.IllegalStateException

抛出:

java.lang.IllegalStateException