Package org.apache.groovy.util.concurrent

Class ManagedIdentityConcurrentMap<K,V>

java.lang.Object

java.util.AbstractMap<K,V>

org.apache.groovy.util.concurrent.ConcurrentReferenceHashMap<K,V>

org.apache.groovy.util.concurrent.ManagedIdentityConcurrentMap<K,V>

Type Parameters:

K - the key type

V - the value type

All Implemented Interfaces:

Serializable, Map<K,V>

public class ManagedIdentityConcurrentMap<K,V>
extends ConcurrentReferenceHashMap<K,V>

This is a basic implementation of a map able to forget its keys could be weak/soft/strong references. This bases on ConcurrentReferenceHashMap, thus it is safe for concurrency. This map compares keys through references.

Since:

4.0.0

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.groovy.util.concurrent.ConcurrentReferenceHashMap

ConcurrentReferenceHashMap.HashIterator, ConcurrentReferenceHashMap.InitializableEntry<K,V>, ConcurrentReferenceHashMap.Option, ConcurrentReferenceHashMap.ReferenceType, ConcurrentReferenceHashMap.SimpleEntry<K,V>, ConcurrentReferenceHashMap.WriteThroughEntry

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

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>

Constructor Summary

Constructors

Constructor	Description
ManagedIdentityConcurrentMap()	Creates a new, empty map with the key weak reference
ManagedIdentityConcurrentMap(int initialCapacity)	Creates a new, empty map with the key weak reference and the specified initial capacity
ManagedIdentityConcurrentMap(ConcurrentReferenceHashMap.ReferenceType keyType)	Creates a new, empty map with the specified key reference type
ManagedIdentityConcurrentMap(ConcurrentReferenceHashMap.ReferenceType keyType, int initialCapacity)	Creates a new, empty map with the specified key reference type and initial capacity

Method Summary

Modifier and Type	Method	Description
V	getOrPut(K key, V value)	Get the key specified value, or put the default value and return it if the key is absent

Methods inherited from class org.apache.groovy.util.concurrent.ConcurrentReferenceHashMap

apply, applyIfAbsent, applyIfPresent, cachedEntrySet, clear, contains, containsKey, containsValue, elements, entrySet, get, hashOf, isEmpty, keys, keySet, purgeStaleEntries, put, putAll, putIfAbsent, remove, remove, replace, replace, size, values

Methods inherited from class java.util.AbstractMap

clone, 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, forEach, getOrDefault, merge, replaceAll

Constructor Details

ManagedIdentityConcurrentMap

public ManagedIdentityConcurrentMap()

Creates a new, empty map with the key weak reference

ManagedIdentityConcurrentMap

public ManagedIdentityConcurrentMap(int initialCapacity)

Creates a new, empty map with the key weak reference and the specified initial capacity

Parameters:

initialCapacity - initial capacity

ManagedIdentityConcurrentMap

public ManagedIdentityConcurrentMap(ConcurrentReferenceHashMap.ReferenceType keyType)

Creates a new, empty map with the specified key reference type

Parameters:

keyType - key reference type

ManagedIdentityConcurrentMap

public ManagedIdentityConcurrentMap(ConcurrentReferenceHashMap.ReferenceType keyType,
 int initialCapacity)

Creates a new, empty map with the specified key reference type and initial capacity

Parameters:

keyType - key reference type

initialCapacity - the initial capacity

Method Details

getOrPut

public V getOrPut(K key,
 V value)

Get the key specified value, or put the default value and return it if the key is absent

Parameters:

key - the key to look up

value - the default value if the key is absent

Returns:

the value