TunnelRenderer.BoundedCache

net.i2p.router.web.helpers.TunnelRenderer.BoundedCache<K,V>

Type Parameters:: K - the key type of the cached entries; V - the value type stored under each key

All Implemented Interfaces:: Serializable, Cloneable, Map<K,V>, SequencedMap<K,V>

private static class TunnelRenderer.BoundedCache<K,V>extends LinkedHashMap<K,V>

A bounded LRU cache extending LinkedHashMap with computeIfAbsent support.

Nested Class Summary
Nested classes/interfaces inherited from class AbstractMap
AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>
Field Summary
Fields
Modifier and Type
Field
Description
private final int
_maxSize
Entries the cache holds before dropping the oldest.
Constructor Summary
Constructors
Constructor
Description
BoundedCache(int maxSize)
Builds a cache with a size limit.
Method Summary
Public Methods
Modifier and Type
Method
Description
Object
clone()

V
computeIfAbsent(K key, java.util.function.Function<? super K, ? extends V> mappingFunction)

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

Methods inherited from class LinkedHashMap
clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, newLinkedHashMap, putFirst, putLast, replaceAll, reversed, sequencedEntrySet, sequencedKeySet, sequencedValues, values
Methods inherited from class HashMap
compute, computeIfPresent, containsKey, isEmpty, merge, newHashMap, put, putAll, putIfAbsent, remove, remove, replace, replace, size
Methods inherited from class AbstractMap
equals, hashCode, toString
Methods inherited from class Object
getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface SequencedMap
firstEntry, lastEntry, pollFirstEntry, pollLastEntry

Field Details
- _maxSize
  private final int _maxSize
  Entries the cache holds before dropping the oldest.
Constructor Details
- BoundedCache
  public BoundedCache(int maxSize)
  Builds a cache with a size limit.
  Parameters:
  maxSize - the entries to keep
Method Details
- removeEldestEntry
  protected boolean removeEldestEntry(Map.Entry<K,V> eldest)
  Overrides:
  removeEldestEntry in class LinkedHashMap<K,V>
- clone
  public Object clone()
  Overrides:
  clone in class HashMap<K,V>
- computeIfAbsent
  public V computeIfAbsent(K key, java.util.function.Function<? super K, ? extends V> mappingFunction)
  Specified by:
  computeIfAbsent in interface Map<K,V>
  Overrides:
  computeIfAbsent in class HashMap<K,V>

Nested Class Summary