com.linecorp.armeria.common.util

Class LruMap<T,U>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<T,U>

com.linecorp.armeria.common.util.LruMap<T,U>

Type Parameters:

T - the key type

U - the value type

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map<T,U>

public class LruMap<T,U>
extends java.util.LinkedHashMap<T,U>

LRU (Least Recently Used) cache Map.

See Also:

Serialized Form

Nested Class Summary

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

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

Constructor Summary

Constructors

Constructor and Description
LruMap(int maxEntries) Creates a new instance with the specified maximum number of allowed entries.

Method Summary

Modifier and Type	Method and Description
protected boolean	removeEldestEntry(java.util.Map.Entry<T,U> eldest) Returns true if the HashMap.size() of this map exceeds the maximum number of allowed entries.

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

LruMap

public LruMap(int maxEntries)

Creates a new instance with the specified maximum number of allowed entries.

Method Detail

removeEldestEntry

protected boolean removeEldestEntry(java.util.Map.Entry<T,U> eldest)

Returns true if the HashMap.size() of this map exceeds the maximum number of allowed entries. Invoked by LinkedHashMap for LRU behavior.

Overrides:

removeEldestEntry in class java.util.LinkedHashMap<T,U>