Package org.jxmpp.util.cache

Class ExpirationCache<K,V>

java.lang.Object

org.jxmpp.util.cache.ExpirationCache<K,V>

All Implemented Interfaces:

Map<K,V>, Cache<K,V>

public class ExpirationCache<K,V>
extends Object
implements Cache<K,V>, Map<K,V>

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Constructor Summary

Constructors

Constructor	Description
ExpirationCache(int maxSize, long defaultExpirationTime)	Construct a new expiration cache.

Method Summary

Modifier and Type	Method	Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
V	get(Object key)
int	getMaxCacheSize()	Return the maximum cache Size.
boolean	isEmpty()
Set<K>	keySet()
V	lookup(K key)	Returns the value of the specified key, or null.
V	put(K key, V value)	Put a value in the cache.
V	put(K key, V value, long expirationTime)	Put a value in the cahce with the specified expiration time in milliseconds.
void	putAll(Map<? extends K,? extends V> m)
V	remove(Object key)	Remove a entry with the given key from the cache.
void	setDefaultExpirationTime(long defaultExpirationTime)	Set the default expiration time in milliseconds.
void	setMaxCacheSize(int maxCacheSize)	Set the maximum cache size.
int	size()
Collection<V>	values()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

Constructor Detail

ExpirationCache

public ExpirationCache(int maxSize,
                       long defaultExpirationTime)

Construct a new expiration cache.

Parameters:

maxSize - the maximum size.

defaultExpirationTime - the default expiration time in milliseconds.

Method Detail

setDefaultExpirationTime

public void setDefaultExpirationTime(long defaultExpirationTime)

Set the default expiration time in milliseconds.

Parameters:

defaultExpirationTime - the default expiration time.

put

public V put(K key,
             V value)

Description copied from interface: Cache

Put a value in the cache.

Specified by:

put in interface Cache<K,V>

Specified by:

put in interface Map<K,V>

Parameters:

key - the key of the value.

value - the value.

Returns:

the previous value or null.

put

public V put(K key,
             V value,
             long expirationTime)

Put a value in the cahce with the specified expiration time in milliseconds.

Parameters:

key - the key of the value.

value - the value.

expirationTime - the expiration time in milliseconds.

Returns:

the previous value or null.

lookup

public V lookup(K key)

Description copied from interface: Cache

Returns the value of the specified key, or null.

Specified by:

lookup in interface Cache<K,V>

Parameters:

key - the key.

Returns:

the value found in the cache, or null.

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

remove

public V remove(Object key)

Remove a entry with the given key from the cache.

Specified by:

remove in interface Map<K,V>

Parameters:

key - the key of the value to remove.

Returns:

the remove value, or null.

getMaxCacheSize

public int getMaxCacheSize()

Description copied from interface: Cache

Return the maximum cache Size.

Specified by:

getMaxCacheSize in interface Cache<K,V>

Returns:

the maximum cache size.

setMaxCacheSize

public void setMaxCacheSize(int maxCacheSize)

Description copied from interface: Cache

Set the maximum cache size.

Specified by:

setMaxCacheSize in interface Cache<K,V>

Parameters:

maxCacheSize - the new maximum cache size.

size

public int size()

Specified by:

size in interface Map<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

putAll

public void putAll(Map<? extends K,? extends V> m)

Specified by:

putAll in interface Map<K,V>

clear

public void clear()

Specified by:

clear in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface Map<K,V>