Package org.apache.phoenix.util

Class SimpleLRUCache<K extends Comparable,V>

java.lang.Object

java.util.AbstractMap<K,V>

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

org.apache.phoenix.util.SimpleLRUCache<K,V>

All Implemented Interfaces:

Serializable, ConcurrentMap<K,V>, Map<K,V>

public class SimpleLRUCache<K extends Comparable,V>
extends ConcurrentHashMap<K,V>

Minimal Cache implementation based on ConcurrentHashMap. The maxSize logic will only work if all access is via the the computeIfAbsent() method.

See Also:

• Serialized Form

Nested Class Summary

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

ConcurrentHashMap.KeySetView<K extends Object,V extends Object>

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>

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

Map.Entry<K extends Object,V extends Object>

Field Summary

Fields

Modifier and Type	Field	Description
protected static final org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
SimpleLRUCache(long maxSize, int concurrencyLevel)

Method Summary

Modifier and Type	Method	Description
V	computeIfAbsent(K key, Function<? super K,? extends V> mappingFunction)

Methods inherited from class java.util.concurrent.ConcurrentHashMap

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

Methods inherited from class java.util.AbstractMap

clone

Methods inherited from class java.lang.Object

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

Field Details

LOG

protected static final org.slf4j.Logger LOG

Constructor Details

SimpleLRUCache

public SimpleLRUCache(long maxSize,
 int concurrencyLevel)

Method Details

computeIfAbsent

public V computeIfAbsent(K key,
 Function<? super K,? extends V> mappingFunction)

Specified by:

computeIfAbsent in interface ConcurrentMap<K extends Comparable,V>

Specified by:

computeIfAbsent in interface Map<K extends Comparable,V>

Overrides:

computeIfAbsent in class ConcurrentHashMap<K extends Comparable,V>