io.vertx.sqlclient.impl.cache

Class LruCache<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<K,V>

io.vertx.sqlclient.impl.cache.LruCache<K,V>

All Implemented Interfaces:

Serializable, Cloneable, Map<K,V>

public class LruCache<K,V>
extends LinkedHashMap<K,V>

A LRU replacement strategy cache based on LinkedHashMap for prepared statements.

See Also:

Serialized Form

Nested Class Summary

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

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Constructor Summary

Constructors

Constructor and Description
LruCache(int capacity)

Method Summary

Modifier and Type	Method and Description
List<V>	cache(K key, V value)
V	evict() Evict the eldest entry from the cache
protected boolean	removeEldestEntry(Map.Entry<K,V> eldest)

Methods inherited from class java.util.LinkedHashMap

clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, replaceAll, values

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Constructor Detail

LruCache

public LruCache(int capacity)

Method Detail

evict

public V evict()

Evict the eldest entry from the cache

Returns:

the eldest value or null

cache

public List<V> cache(K key,
                     V value)

removeEldestEntry

protected boolean removeEldestEntry(Map.Entry<K,V> eldest)

Overrides:

removeEldestEntry in class LinkedHashMap<K,V>