com.fr.third.jgroups.blocks

类 Cache<K,V>

java.lang.Object

com.fr.third.jgroups.blocks.Cache<K,V>

public class Cache<K,V>
extends java.lang.Object

Simple cache which maintains keys and value. A reaper can be enabled which periodically evicts expired entries. Also, when the cache is configured to be bounded, entries in excess of the max size will be evicted on put().

作者:

Bela Ban

嵌套类概要

嵌套类

限定符和类型	类和说明
static interface	Cache.ChangeListener
static class	Cache.Value<V>

构造器概要

构造器

构造器和说明
Cache()

方法概要

方法

限定符和类型	方法和说明
void	addChangeListener(Cache.ChangeListener l)
void	disableReaping()
java.lang.String	dump()
void	enableReaping(long interval) Runs the reaper every interval ms, evicts expired items
java.util.Set<java.util.Map.Entry<K,Cache.Value<V>>>	entrySet()
V	get(K key)
Cache.Value<V>	getEntry(K key)
java.util.concurrent.ConcurrentMap<K,Cache.Value<V>>	getInternalMap() This method should not be used to add or remove elements !
int	getMaxNumberOfEntries()
int	getSize()
boolean	isReapingEnabled()
V	put(K key, V val, long caching_time)
V	remove(K key)
void	removeChangeListener(Cache.ChangeListener l)
void	setMaxNumberOfEntries(int max_num_entries)
void	start()
void	stop()
java.lang.String	toString()

从类继承的方法 java.lang.Object

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

构造器详细资料

Cache

public Cache()

方法详细资料

getMaxNumberOfEntries

public int getMaxNumberOfEntries()

setMaxNumberOfEntries

public void setMaxNumberOfEntries(int max_num_entries)

addChangeListener

public void addChangeListener(Cache.ChangeListener l)

removeChangeListener

public void removeChangeListener(Cache.ChangeListener l)

getSize

public int getSize()

isReapingEnabled

public boolean isReapingEnabled()

enableReaping

public void enableReaping(long interval)

Runs the reaper every interval ms, evicts expired items

disableReaping

public void disableReaping()

start

public void start()

stop

public void stop()

put

public V put(K key,
    V val,
    long caching_time)

参数:

key -

val -

caching_time - Number of milliseconds to keep an entry in the cache. -1 means don't cache (if reaping is enabled, we'll evict an entry with -1 caching time), 0 means never evict. In the latter case, we can still evict an entry with 0 caching time: when we have a bounded cache, we evict in order of insertion no matter what the caching time is.

get

public V get(K key)

getInternalMap

public java.util.concurrent.ConcurrentMap<K,Cache.Value<V>> getInternalMap()

This method should not be used to add or remove elements ! It was just added because ReplCacheDemo requires it for its data model

返回:

getEntry

public Cache.Value<V> getEntry(K key)

remove

public V remove(K key)

entrySet

public java.util.Set<java.util.Map.Entry<K,Cache.Value<V>>> entrySet()

toString

public java.lang.String toString()

覆盖:

toString 在类中 java.lang.Object

dump

public java.lang.String dump()