Package org.apache.storm.utils

Class LruMap<A,B>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<A,B>

org.apache.storm.utils.LruMap<A,B>

All Implemented Interfaces:

Serializable, Cloneable, Map<A,B>

public class LruMap<A,B>
extends LinkedHashMap<A,B>

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	LruMap.CacheEvictionCallback<K,V>

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

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

Constructor Summary

Constructors

Constructor	Description
LruMap(int maxSize)
LruMap(int maxSize, LruMap.CacheEvictionCallback evictionCallback)	Creates an LRU map that will call back before data is removed from the map.

Method Summary

Modifier and Type	Method	Description
protected boolean	removeEldestEntry(Map.Entry<A,B> 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 Details

LruMap

public LruMap(int maxSize)

LruMap

public LruMap(int maxSize,
 LruMap.CacheEvictionCallback evictionCallback)

Creates an LRU map that will call back before data is removed from the map.

Parameters:

maxSize - max capacity for the map

evictionCallback - callback to be called before removing data

Method Details

removeEldestEntry

protected boolean removeEldestEntry(Map.Entry<A,B> eldest)

Overrides:

removeEldestEntry in class LinkedHashMap<A,B>