Package com.snowbound.common.utils

Class LRUHashtable<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.concurrent.ConcurrentHashMap<K,V>

com.snowbound.common.utils.CapacityLimitedHashtable<K,V>

com.snowbound.common.utils.LRUHashtable<K,V>

Type Parameters:

K - key type

V - value type

All Implemented Interfaces:

java.io.Serializable, java.util.concurrent.ConcurrentMap<K,V>, java.util.Map<K,V>

public class LRUHashtable<K,V>
extends CapacityLimitedHashtable<K,V>

Implementation of CapacityLimitedHashtable that only allows a specific number of entries before ejecting the least-recently-used items.

See Also:

CapacityLimitedHashtable, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.concurrent.ConcurrentHashMap

java.util.concurrent.ConcurrentHashMap.KeySetView<K extends java.lang.Object,V extends java.lang.Object>

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K extends java.lang.Object,V extends java.lang.Object>, java.util.AbstractMap.SimpleImmutableEntry<K extends java.lang.Object,V extends java.lang.Object>

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

java.util.Map.Entry<K extends java.lang.Object,V extends java.lang.Object>

Constructor Summary

Constructors

Constructor	Description
LRUHashtable(long max)	Constructor.

Method Summary

Modifier and Type	Method	Description
long	getObjectSize(java.lang.Object obj)	Always returns 1; this makes capacity a measure of the number of items in the table.

Methods inherited from class com.snowbound.common.utils.CapacityLimitedHashtable

currentSize, get, put, remove

Methods inherited from class java.util.concurrent.ConcurrentHashMap

clear, compute, computeIfAbsent, computeIfPresent, contains, containsKey, containsValue, elements, entrySet, equals, forEach, forEach, forEach, forEachEntry, forEachEntry, forEachKey, forEachKey, forEachValue, forEachValue, getOrDefault, hashCode, isEmpty, keys, keySet, keySet, mappingCount, merge, newKeySet, newKeySet, putAll, putIfAbsent, reduce, reduceEntries, reduceEntries, reduceEntriesToDouble, reduceEntriesToInt, reduceEntriesToLong, reduceKeys, reduceKeys, reduceKeysToDouble, reduceKeysToInt, reduceKeysToLong, reduceToDouble, reduceToInt, reduceToLong, reduceValues, reduceValues, reduceValuesToDouble, reduceValuesToInt, reduceValuesToLong, remove, replace, replace, replaceAll, search, searchEntries, searchKeys, searchValues, size, toString, values

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LRUHashtable

public LRUHashtable(long max)

Constructor.

Parameters:

max - Maximum capacity of this table in number of items.

Method Detail

getObjectSize

public long getObjectSize(java.lang.Object obj)

Always returns 1; this makes capacity a measure of the number of items in the table.

Specified by:

getObjectSize in class CapacityLimitedHashtable<K,V>

Parameters:

obj - object to size; since this always returns 1 its value does not matter

Returns:

always returns 1