org.jgroups.util

Class ExpiryCache<K>

java.lang.Object

org.jgroups.util.ExpiryCache<K>

public class ExpiryCache<K>
extends java.lang.Object

Cache which maintains timestamps for keys, and methods to remove/replace expired keys. Compared to AgeOutCache, ExpiryCache doesn't require a timer task to run

Version:

3.3

Author:

Bela Ban

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.concurrent.ConcurrentMap<K,java.lang.Long>	map
protected long	timeout

Constructor Summary

Constructors

Constructor and Description
ExpiryCache(long timeout) Creates a new instance

Method Summary

Modifier and Type	Method and Description
boolean	addIfAbsentOrExpired(K key)
void	clear()
boolean	contains(K key)
long	getTimeout()
boolean	hasExpired(K key)
protected boolean	hasExpired(long val, long current_time)
void	remove(K key)
void	removeAll(java.util.Collection<K> keys)
int	removeExpiredElements()
void	setTimeout(long timeout)
int	size()
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

timeout

protected long timeout

map

protected final java.util.concurrent.ConcurrentMap<K,java.lang.Long> map

Constructor Detail

ExpiryCache

public ExpiryCache(long timeout)

Creates a new instance

Parameters:

timeout - Timeout in ms

Method Detail

getTimeout

public long getTimeout()

setTimeout

public void setTimeout(long timeout)

addIfAbsentOrExpired

public boolean addIfAbsentOrExpired(K key)

contains

public boolean contains(K key)

hasExpired

public boolean hasExpired(K key)

remove

public void remove(K key)

removeAll

public void removeAll(java.util.Collection<K> keys)

removeExpiredElements

public int removeExpiredElements()

clear

public void clear()

size

public int size()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hasExpired

protected boolean hasExpired(long val,
                             long current_time)